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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
    </build-info>


<item>
            <title>[SERVER-24971] Excessive memory held by sessions when application threads do evictions</title>
                <link>https://jira.mongodb.org/browse/SERVER-24971</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Under heavy cache pressure application threads will get involved with evictions. This uses memory that is associated with and retained by the WT session. If there are a large number of sessions (active connections), and the evicted pages are large, this can amount to a very large amount of memory, several GBs in some cases.&lt;/p&gt;</description>
                <environment></environment>
        <key id="299858">SERVER-24971</key>
            <summary>Excessive memory held by sessions when application threads do evictions</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="michael.cahill@mongodb.com">Michael Cahill</assignee>
                                    <reporter username="bruce.lucas@mongodb.com">Bruce Lucas</reporter>
                        <labels>
                            <label>code-only</label>
                    </labels>
                <created>Sun, 10 Jul 2016 13:38:33 +0000</created>
                <updated>Wed, 20 Sep 2017 17:48:58 +0000</updated>
                            <resolved>Mon, 8 Aug 2016 00:47:09 +0000</resolved>
                                                    <fixVersion>3.2.9</fixVersion>
                    <fixVersion>3.3.11</fixVersion>
                                    <component>WiredTiger</component>
                                        <votes>1</votes>
                                    <watches>16</watches>
                                                                                                                <comments>
                            <comment id="1382671" author="xgen-internal-githook" created="Tue, 13 Sep 2016 00:37:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;agorrod&apos;, u&apos;name&apos;: u&apos;Alex Gorrod&apos;, u&apos;email&apos;: u&apos;alexander.gorrod@mongodb.com&apos;}
&lt;p&gt;Message: Import wiredtiger: 911c940adab547d36ac305fc627a79e637fa3c40 from branch mongodb-3.2&lt;/p&gt;

&lt;p&gt;ref: dddca65..911c940ada&lt;br/&gt;
for: 3.2.10&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24971&quot; title=&quot;Excessive memory held by sessions when application threads do evictions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24971&quot;&gt;&lt;del&gt;SERVER-24971&lt;/del&gt;&lt;/a&gt;  Excessive memory held by sessions when application threads do evictions&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25843&quot; title=&quot;Coverity analysis defect 99856: Redundant test&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-25843&quot;&gt;&lt;del&gt;SERVER-25843&lt;/del&gt;&lt;/a&gt;  Coverity analysis defect 99856: Redundant test&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25845&quot; title=&quot;Coverity analysis defect 99859: Explicit null dereferenced&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-25845&quot;&gt;&lt;del&gt;SERVER-25845&lt;/del&gt;&lt;/a&gt;  Coverity analysis defect 99859: Explicit null dereferenced&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25846&quot; title=&quot;Coverity analysis defect 99861: Dereference after null check&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-25846&quot;&gt;&lt;del&gt;SERVER-25846&lt;/del&gt;&lt;/a&gt;  Coverity analysis defect 99861: Dereference after null check&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-1162&quot; title=&quot;Add latency to Jenkins wtperf tests and plots&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-1162&quot;&gt;&lt;del&gt;WT-1162&lt;/del&gt;&lt;/a&gt;       Add latency to Jenkins wtperf tests and plots&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2026&quot; title=&quot;Maximum pages size at eviction too large&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2026&quot;&gt;&lt;del&gt;WT-2026&lt;/del&gt;&lt;/a&gt;       Maximum pages size at eviction too large&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2221&quot; title=&quot;Document which statistics are available via a &amp;quot;fast&amp;quot; configuration vs. an &amp;quot;all&amp;quot; configuration&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2221&quot;&gt;&lt;del&gt;WT-2221&lt;/del&gt;&lt;/a&gt;       Document which statistics are available via a &quot;fast&quot; configuration vs. an &quot;all&quot; configuration&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2233&quot; title=&quot;Investigate changing when the eviction server switches to aggressive mode.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2233&quot;&gt;&lt;del&gt;WT-2233&lt;/del&gt;&lt;/a&gt;       Investigate changing when the eviction server switches to aggressive mode.&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2239&quot; title=&quot;Make sure LSM cursors read up to date dsk_gen, it was racing with compact&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2239&quot;&gt;&lt;del&gt;WT-2239&lt;/del&gt;&lt;/a&gt;       Make sure LSM cursors read up to date dsk_gen, it was racing with compact&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2323&quot; title=&quot;Allocate a transaction id at the beginning of join cursor iteration&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2323&quot;&gt;&lt;del&gt;WT-2323&lt;/del&gt;&lt;/a&gt;       Allocate a transaction id at the beginning of join cursor iteration&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2353&quot; title=&quot;Failure to create async threads as part of a wiredtiger_open call will cause a hang&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2353&quot;&gt;&lt;del&gt;WT-2353&lt;/del&gt;&lt;/a&gt;       Failure to create async threads as part of a wiredtiger_open call will cause a hang&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2380&quot; title=&quot;Make scripts fail if code doesn&amp;#39;t match style&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2380&quot;&gt;&lt;del&gt;WT-2380&lt;/del&gt;&lt;/a&gt;       Make scripts fail if code doesn&apos;t match style&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2486&quot; title=&quot;Update make check so that it runs faster&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2486&quot;&gt;&lt;del&gt;WT-2486&lt;/del&gt;&lt;/a&gt;       Update make check so that it runs faster&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2555&quot; title=&quot;make format run on Windows&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2555&quot;&gt;&lt;del&gt;WT-2555&lt;/del&gt;&lt;/a&gt;       make format run on Windows&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2578&quot; title=&quot;remove write barriers from the TAILQ_INSERT_XXX macros&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2578&quot;&gt;&lt;del&gt;WT-2578&lt;/del&gt;&lt;/a&gt;       remove write barriers from the TAILQ_INSERT_XXX macros&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2631&quot; title=&quot;nullptr is passed for parameters marked with attribute non-null&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2631&quot;&gt;&lt;del&gt;WT-2631&lt;/del&gt;&lt;/a&gt;       nullptr is passed for parameters marked with attribute non-null&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2638&quot; title=&quot;ftruncate may not be supported&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2638&quot;&gt;&lt;del&gt;WT-2638&lt;/del&gt;&lt;/a&gt;       ftruncate may not be supported&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2645&quot; title=&quot;wt dump: push the complexity of collecting metadata into a dump cursor&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2645&quot;&gt;&lt;del&gt;WT-2645&lt;/del&gt;&lt;/a&gt;       wt dump: push the complexity of collecting metadata into a dump cursor&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2648&quot; title=&quot;cache-line alignment for new ports&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2648&quot;&gt;&lt;del&gt;WT-2648&lt;/del&gt;&lt;/a&gt;       cache-line alignment for new ports&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2665&quot; title=&quot;Limit allocator fragmentation in WiredTiger&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2665&quot;&gt;&lt;del&gt;WT-2665&lt;/del&gt;&lt;/a&gt;       Limit allocator fragmentation in WiredTiger&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2678&quot; title=&quot;The metadata should not imply that an empty value is true&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2678&quot;&gt;&lt;del&gt;WT-2678&lt;/del&gt;&lt;/a&gt;       The metadata should not imply that an empty value is true&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2688&quot; title=&quot;configure --enable-python doesn&amp;#39;t check for availability of swig&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2688&quot;&gt;&lt;del&gt;WT-2688&lt;/del&gt;&lt;/a&gt;       configure --enable-python doesn&apos;t check for availability of swig&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2693&quot; title=&quot;Check open_cursor error paths for consistent handling&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2693&quot;&gt;&lt;del&gt;WT-2693&lt;/del&gt;&lt;/a&gt;       Check open_cursor error paths for consistent handling&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2695&quot; title=&quot;Integrate s390x accelerated crc32c support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2695&quot;&gt;&lt;del&gt;WT-2695&lt;/del&gt;&lt;/a&gt;       Integrate s390x accelerated crc32c support&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2708&quot; title=&quot;split child-update race with reconciliation/eviction&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2708&quot;&gt;&lt;del&gt;WT-2708&lt;/del&gt;&lt;/a&gt;       split child-update race with reconciliation/eviction&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2711&quot; title=&quot;Change statistics log configuration options&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2711&quot;&gt;&lt;del&gt;WT-2711&lt;/del&gt;&lt;/a&gt;       Change statistics log configuration options&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2719&quot; title=&quot;add fuzz testing for WiredTiger options and reconfiguration.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2719&quot;&gt;&lt;del&gt;WT-2719&lt;/del&gt;&lt;/a&gt;       add fuzz testing for WiredTiger options and reconfiguration.&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2728&quot; title=&quot;Don&amp;#39;t re-read log file headers during log_flush&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2728&quot;&gt;&lt;del&gt;WT-2728&lt;/del&gt;&lt;/a&gt;       Don&apos;t re-read log file headers during log_flush&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2729&quot; title=&quot;Focus eviction walks in largest trees&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2729&quot;&gt;&lt;del&gt;WT-2729&lt;/del&gt;&lt;/a&gt;       Focus eviction walks in largest trees&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2730&quot; title=&quot;cursor next/prev can return the wrong key/value pair when crossing a page boundary&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2730&quot;&gt;&lt;del&gt;WT-2730&lt;/del&gt;&lt;/a&gt;       cursor next/prev can return the wrong key/value pair when crossing a page boundary&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2731&quot; title=&quot;Raw compression can create pages that are larger than expected&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2731&quot;&gt;&lt;del&gt;WT-2731&lt;/del&gt;&lt;/a&gt;       Raw compression can create pages that are larger than expected&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2732&quot; title=&quot;Coverity analysis defect 99665: Redundant test&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2732&quot;&gt;&lt;del&gt;WT-2732&lt;/del&gt;&lt;/a&gt;       Coverity analysis defect 99665: Redundant test&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2734&quot; title=&quot;Improve documentation of eviction behavior&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2734&quot;&gt;&lt;del&gt;WT-2734&lt;/del&gt;&lt;/a&gt;       Improve documentation of eviction behavior&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2737&quot; title=&quot;Scrub dirty pages rather than evicting them&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2737&quot;&gt;&lt;del&gt;WT-2737&lt;/del&gt;&lt;/a&gt;       Scrub dirty pages rather than evicting them&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2738&quot; title=&quot;Remove the ability to change the default checkpoint name&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2738&quot;&gt;&lt;del&gt;WT-2738&lt;/del&gt;&lt;/a&gt;       Remove the ability to change the default checkpoint name&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2739&quot; title=&quot;pluggable file systems documentation cleanups&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2739&quot;&gt;&lt;del&gt;WT-2739&lt;/del&gt;&lt;/a&gt;       pluggable file systems documentation cleanups&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2743&quot; title=&quot;Thread count statistics always report 0&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2743&quot;&gt;&lt;del&gt;WT-2743&lt;/del&gt;&lt;/a&gt;       Thread count statistics always report 0&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2744&quot; title=&quot;partial line even with line buffering set&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2744&quot;&gt;&lt;del&gt;WT-2744&lt;/del&gt;&lt;/a&gt;       partial line even with line buffering set&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2746&quot; title=&quot;track checkpoint I/O separately from eviction I/O&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2746&quot;&gt;&lt;del&gt;WT-2746&lt;/del&gt;&lt;/a&gt;       track checkpoint I/O separately from eviction I/O&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2751&quot; title=&quot;column-store statistics incorrectly calculates the number of entries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2751&quot;&gt;&lt;del&gt;WT-2751&lt;/del&gt;&lt;/a&gt;       column-store statistics incorrectly calculates the number of entries&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2752&quot; title=&quot;Fixes to zipfian wtperf workload config&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2752&quot;&gt;&lt;del&gt;WT-2752&lt;/del&gt;&lt;/a&gt;       Fixes to zipfian wtperf workload config&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2755&quot; title=&quot;flexelint configuration treats size_t as 4B type&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2755&quot;&gt;&lt;del&gt;WT-2755&lt;/del&gt;&lt;/a&gt;       flexelint configuration treats size_t as 4B type&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2756&quot; title=&quot;Upgrade the autoconf archive package to check for swig 3.0&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2756&quot;&gt;&lt;del&gt;WT-2756&lt;/del&gt;&lt;/a&gt;       Upgrade the autoconf archive package to check for swig 3.0&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2757&quot; title=&quot;Column tables behave differently when column names are provided&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2757&quot;&gt;&lt;del&gt;WT-2757&lt;/del&gt;&lt;/a&gt;       Column tables behave differently when column names are provided&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2759&quot; title=&quot;Releasing the hot-backup lock doesn&amp;#39;t require the schema lock.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2759&quot;&gt;&lt;del&gt;WT-2759&lt;/del&gt;&lt;/a&gt;       Releasing the hot-backup lock doesn&apos;t require the schema lock.&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2760&quot; title=&quot;Fix a bug in backup related to directory sync. Change the filesystem API to make durable the default&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2760&quot;&gt;&lt;del&gt;WT-2760&lt;/del&gt;&lt;/a&gt;       Fix a bug in backup related to directory sync. Change the filesystem API to make durable the default&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2762&quot; title=&quot;wtstats tool fails if checkpoint runs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2762&quot;&gt;&lt;del&gt;WT-2762&lt;/del&gt;&lt;/a&gt;       wtstats tool fails if checkpoint runs&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2763&quot; title=&quot;Unit test test_intpack failing on OSX&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2763&quot;&gt;&lt;del&gt;WT-2763&lt;/del&gt;&lt;/a&gt;       Unit test test_intpack failing on OSX&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2764&quot; title=&quot;Optimize checkpoints to reduce throughput disruption&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2764&quot;&gt;&lt;del&gt;WT-2764&lt;/del&gt;&lt;/a&gt;       Optimize checkpoints to reduce throughput disruption&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2765&quot; title=&quot;wt dump: indices need to be shown in the dump output&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2765&quot;&gt;&lt;del&gt;WT-2765&lt;/del&gt;&lt;/a&gt;       wt dump: indices need to be shown in the dump output&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2766&quot; title=&quot;Don&amp;#39;t count eviction of lookaside file pages for the purpose of checking stuck cache&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2766&quot;&gt;&lt;del&gt;WT-2766&lt;/del&gt;&lt;/a&gt;       Don&apos;t count eviction of lookaside file pages for the purpose of checking stuck cache&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2767&quot; title=&quot;test suite needs way to run an individual scenario&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2767&quot;&gt;&lt;del&gt;WT-2767&lt;/del&gt;&lt;/a&gt;       test suite needs way to run an individual scenario&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2769&quot; title=&quot;Update documentation to reflect correct limits of memory_page_max&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2769&quot;&gt;&lt;del&gt;WT-2769&lt;/del&gt;&lt;/a&gt;       Update documentation to reflect correct limits of memory_page_max&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2770&quot; title=&quot;Add statistics tracking schema operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2770&quot;&gt;&lt;del&gt;WT-2770&lt;/del&gt;&lt;/a&gt;       Add statistics tracking schema operations&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2772&quot; title=&quot;Investigate log performance testing weirdness&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2772&quot;&gt;&lt;del&gt;WT-2772&lt;/del&gt;&lt;/a&gt;       Investigate log performance testing weirdness&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2773&quot; title=&quot;search_near in indexes does not find exact matches&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2773&quot;&gt;&lt;del&gt;WT-2773&lt;/del&gt;&lt;/a&gt;       search_near in indexes does not find exact matches&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2774&quot; title=&quot;minor cleanups/improvements&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2774&quot;&gt;&lt;del&gt;WT-2774&lt;/del&gt;&lt;/a&gt;       minor cleanups/improvements&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2778&quot; title=&quot;Python test suite: make scenario initialization consistent&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2778&quot;&gt;&lt;del&gt;WT-2778&lt;/del&gt;&lt;/a&gt;       Python test suite: make scenario initialization consistent&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2779&quot; title=&quot;Raw compression created unexpectedly large pages on disk&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2779&quot;&gt;&lt;del&gt;WT-2779&lt;/del&gt;&lt;/a&gt;       Raw compression created unexpectedly large pages on disk&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2781&quot; title=&quot;Enhance bulk cursor option with an option to return immediately on contention&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2781&quot;&gt;&lt;del&gt;WT-2781&lt;/del&gt;&lt;/a&gt;       Enhance bulk cursor option with an option to return immediately on contention&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2782&quot; title=&quot;Missing a fs_directory_list_free in ex_file_system.c&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2782&quot;&gt;&lt;del&gt;WT-2782&lt;/del&gt;&lt;/a&gt;       Missing a fs_directory_list_free in ex_file_system.c&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2783&quot; title=&quot;wtperf multi-btree.wtperf dumps core on Mac&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2783&quot;&gt;&lt;del&gt;WT-2783&lt;/del&gt;&lt;/a&gt;       wtperf multi-btree.wtperf dumps core on Mac&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2785&quot; title=&quot;Scrub dirty pages rather than evicting them: single-page reconciliation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2785&quot;&gt;&lt;del&gt;WT-2785&lt;/del&gt;&lt;/a&gt;       Scrub dirty pages rather than evicting them: single-page reconciliation&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2787&quot; title=&quot;Include src/include/wiredtiger_ext.h is problematic&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2787&quot;&gt;&lt;del&gt;WT-2787&lt;/del&gt;&lt;/a&gt;       Include src/include/wiredtiger_ext.h is problematic&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2788&quot; title=&quot;Java: freed memory overwrite during handle close can cause JNI crash&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2788&quot;&gt;&lt;del&gt;WT-2788&lt;/del&gt;&lt;/a&gt;       Java: freed memory overwrite during handle close can cause JNI crash&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2791&quot; title=&quot;Enhance OS X Evergreen unit test&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2791&quot;&gt;&lt;del&gt;WT-2791&lt;/del&gt;&lt;/a&gt;       Enhance OS X Evergreen unit test&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2793&quot; title=&quot;wtperf config improvements&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2793&quot;&gt;&lt;del&gt;WT-2793&lt;/del&gt;&lt;/a&gt;       wtperf config improvements&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2795&quot; title=&quot;Update documentation around read-only configuration&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2795&quot;&gt;&lt;del&gt;WT-2795&lt;/del&gt;&lt;/a&gt;       Update documentation around read-only configuration&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2796&quot; title=&quot;Memory leak in reconciliation uncovered by stress testing &quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2796&quot;&gt;&lt;del&gt;WT-2796&lt;/del&gt;&lt;/a&gt;       Memory leak in reconciliation uncovered by stress testing&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2798&quot; title=&quot;Crash vulnerability with nojournal after create during checkpoint&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2798&quot;&gt;&lt;del&gt;WT-2798&lt;/del&gt;&lt;/a&gt;       Crash vulnerability with nojournal after create during checkpoint&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2800&quot; title=&quot;Illegal file format in test/format on PPC&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2800&quot;&gt;&lt;del&gt;WT-2800&lt;/del&gt;&lt;/a&gt;       Illegal file format in test/format on PPC&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2801&quot; title=&quot;Crash vulnerability from eviction of metadata during checkpoint&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2801&quot;&gt;&lt;del&gt;WT-2801&lt;/del&gt;&lt;/a&gt;       Crash vulnerability from eviction of metadata during checkpoint&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2802&quot; title=&quot;Transaction commit causes heap-use-after free&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2802&quot;&gt;&lt;del&gt;WT-2802&lt;/del&gt;&lt;/a&gt;       Transaction commit causes heap-use-after free&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2803&quot; title=&quot;Add verbose functionality to WT Evergreen tests&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2803&quot;&gt;&lt;del&gt;WT-2803&lt;/del&gt;&lt;/a&gt;       Add verbose functionality to WT Evergreen tests&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2804&quot; title=&quot;Don&amp;#39;t read values in a tree without a snapshot&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2804&quot;&gt;&lt;del&gt;WT-2804&lt;/del&gt;&lt;/a&gt;       Don&apos;t read values in a tree without a snapshot&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2805&quot; title=&quot;Infinite recursion if error streams fail&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2805&quot;&gt;&lt;del&gt;WT-2805&lt;/del&gt;&lt;/a&gt;       Infinite recursion if error streams fail&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2806&quot; title=&quot;wtperf allocation size off-by-one&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2806&quot;&gt;&lt;del&gt;WT-2806&lt;/del&gt;&lt;/a&gt;       wtperf allocation size off-by-one&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2807&quot; title=&quot;Switch Jenkins performance tests to tcmalloc&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2807&quot;&gt;&lt;del&gt;WT-2807&lt;/del&gt;&lt;/a&gt;       Switch Jenkins performance tests to tcmalloc&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2811&quot; title=&quot;Reconciliation asserts that transaction time has gone backwards&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2811&quot;&gt;&lt;del&gt;WT-2811&lt;/del&gt;&lt;/a&gt;       Reconciliation asserts that transaction time has gone backwards&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2812&quot; title=&quot;Error when reconfiguring cache targets&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2812&quot;&gt;&lt;del&gt;WT-2812&lt;/del&gt;&lt;/a&gt;       Error when reconfiguring cache targets&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2813&quot; title=&quot;small cache usage stuck even with large cache&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2813&quot;&gt;&lt;del&gt;WT-2813&lt;/del&gt;&lt;/a&gt;       small cache usage stuck even with large cache&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2814&quot; title=&quot;Enhance wtperf to support single-op truncate mode&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2814&quot;&gt;&lt;del&gt;WT-2814&lt;/del&gt;&lt;/a&gt;       Enhance wtperf to support single-op truncate mode&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2816&quot; title=&quot;Improve WiredTiger eviction performance&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2816&quot;&gt;&lt;del&gt;WT-2816&lt;/del&gt;&lt;/a&gt;       Improve WiredTiger eviction performance&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2817&quot; title=&quot;Investigate performance regression in develop, add workload to wtperf/runners&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2817&quot;&gt;&lt;del&gt;WT-2817&lt;/del&gt;&lt;/a&gt;       Investigate performance regression in develop, add workload to wtperf/runners&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2818&quot; title=&quot;The page visibility check when queuing pages for eviction is overly restrictive&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2818&quot;&gt;&lt;del&gt;WT-2818&lt;/del&gt;&lt;/a&gt;       The page visibility check when queuing pages for eviction is overly restrictive&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2820&quot; title=&quot;add gcc warn_unused_result attribute&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2820&quot;&gt;&lt;del&gt;WT-2820&lt;/del&gt;&lt;/a&gt;       add gcc warn_unused_result attribute&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2822&quot; title=&quot;panic mutex and other functions that cannot fail&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2822&quot;&gt;&lt;del&gt;WT-2822&lt;/del&gt;&lt;/a&gt;       panic mutex and other functions that cannot fail&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2823&quot; title=&quot;support file handles without a truncate method&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2823&quot;&gt;&lt;del&gt;WT-2823&lt;/del&gt;&lt;/a&gt;       support file handles without a truncate method&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2824&quot; title=&quot;wtperf displays connection and table create configurations twice&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2824&quot;&gt;&lt;del&gt;WT-2824&lt;/del&gt;&lt;/a&gt;       wtperf displays connection and table create configurations twice&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2826&quot; title=&quot;clang38 false positive on uninitialized variable.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2826&quot;&gt;&lt;del&gt;WT-2826&lt;/del&gt;&lt;/a&gt;       clang38 false positive on uninitialized variable.&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2827&quot; title=&quot;checkpoint log_size configuration improvements&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2827&quot;&gt;&lt;del&gt;WT-2827&lt;/del&gt;&lt;/a&gt;       checkpoint log_size configuration improvements&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2828&quot; title=&quot;Make long wtperf tests reflect mongoDB usage&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2828&quot;&gt;&lt;del&gt;WT-2828&lt;/del&gt;&lt;/a&gt;       Make long wtperf tests reflect mongoDB usage&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2829&quot; title=&quot;Switch automated testing to use enable-strict configure option&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2829&quot;&gt;&lt;del&gt;WT-2829&lt;/del&gt;&lt;/a&gt;       Switch automated testing to use enable-strict configure option&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2832&quot; title=&quot;Python test uses hard-coded temporary directory&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2832&quot;&gt;&lt;del&gt;WT-2832&lt;/del&gt;&lt;/a&gt;       Python test uses hard-coded temporary directory&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2834&quot; title=&quot;Join cursor: discrepancy with bloom filters&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2834&quot;&gt;&lt;del&gt;WT-2834&lt;/del&gt;&lt;/a&gt;       Join cursor: discrepancy with bloom filters&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2835&quot; title=&quot;WT_CONNECTION.leak-memory can skip memory map and cache cleanup&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2835&quot;&gt;&lt;del&gt;WT-2835&lt;/del&gt;&lt;/a&gt;       WT_CONNECTION.leak-memory can skip memory map and cache cleanup&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2838&quot; title=&quot;Don&amp;#39;t free session handles on close if leak memory is configured&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2838&quot;&gt;&lt;del&gt;WT-2838&lt;/del&gt;&lt;/a&gt;       Don&apos;t free session handles on close if leak memory is configured&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2839&quot; title=&quot;lint: Ignoring return value of function&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2839&quot;&gt;&lt;del&gt;WT-2839&lt;/del&gt;&lt;/a&gt;       lint: Ignoring return value of function&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2840&quot; title=&quot;clang analysis: garbage values&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2840&quot;&gt;&lt;del&gt;WT-2840&lt;/del&gt;&lt;/a&gt;       clang analysis: garbage values&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2841&quot; title=&quot;Jenkins Valgrind runner is reporting errors in test wt2719_reconfig&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2841&quot;&gt;&lt;del&gt;WT-2841&lt;/del&gt;&lt;/a&gt;       Jenkins Valgrind runner is reporting errors in test wt2719_reconfig&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2842&quot; title=&quot;split wtperf&amp;#39;s configuration into per-database and per-run parts&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2842&quot;&gt;&lt;del&gt;WT-2842&lt;/del&gt;&lt;/a&gt;       split wtperf&apos;s configuration into per-database and per-run parts&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2843&quot; title=&quot;Fix a bug in recovery if there is no filesystem truncate support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2843&quot;&gt;&lt;del&gt;WT-2843&lt;/del&gt;&lt;/a&gt;       Fix a bug in recovery if there is no filesystem truncate support&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2846&quot; title=&quot;Several bugs related to reconfiguring eviction server at runtime&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2846&quot;&gt;&lt;del&gt;WT-2846&lt;/del&gt;&lt;/a&gt;       Several bugs related to reconfiguring eviction server at runtime&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2847&quot; title=&quot;Merge fair locks into read/write locks.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2847&quot;&gt;&lt;del&gt;WT-2847&lt;/del&gt;&lt;/a&gt;       Merge fair locks into read/write locks.&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2850&quot; title=&quot;clang 4.1 attribute warnings when building&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2850&quot;&gt;&lt;del&gt;WT-2850&lt;/del&gt;&lt;/a&gt;       clang 4.1 attribute warnings when building&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2853&quot; title=&quot;Multi threaded reader writer example shows temporary slowdown or lockup&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2853&quot;&gt;&lt;del&gt;WT-2853&lt;/del&gt;&lt;/a&gt;       Multi threaded reader writer example shows temporary slowdown or lockup&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2857&quot; title=&quot;POSIX ftruncate calls should be #ifdef&amp;#39;d HAVE_FTRUNCATE&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2857&quot;&gt;&lt;del&gt;WT-2857&lt;/del&gt;&lt;/a&gt;       POSIX ftruncate calls should be #ifdef&apos;d HAVE_FTRUNCATE&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2862&quot; title=&quot;Fix lint error in test case for forced eviction with multiple cursors&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2862&quot;&gt;&lt;del&gt;WT-2862&lt;/del&gt;&lt;/a&gt;       Fix lint error in test case for forced eviction with multiple cursors&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2863&quot; title=&quot;Support UTF-8 paths on Windows&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2863&quot;&gt;&lt;del&gt;WT-2863&lt;/del&gt;&lt;/a&gt;       Support UTF-8 paths on Windows&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2865&quot; title=&quot;eviction thread error failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2865&quot;&gt;&lt;del&gt;WT-2865&lt;/del&gt;&lt;/a&gt;       eviction thread error failure&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2866&quot; title=&quot;Eviction server algorithm tuning&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2866&quot;&gt;&lt;del&gt;WT-2866&lt;/del&gt;&lt;/a&gt;       Eviction server algorithm tuning&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2867&quot; title=&quot;Review and fix barrier usage in __lsm_tree_close&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2867&quot;&gt;&lt;del&gt;WT-2867&lt;/del&gt;&lt;/a&gt;       Review and fix barrier usage in __lsm_tree_close&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2868&quot; title=&quot;Add sample_interval to checkpoint-stress wtperf config&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2868&quot;&gt;&lt;del&gt;WT-2868&lt;/del&gt;&lt;/a&gt;       Add sample_interval to checkpoint-stress wtperf config&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2869&quot; title=&quot;Performance regression on secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2869&quot;&gt;&lt;del&gt;WT-2869&lt;/del&gt;&lt;/a&gt;       Performance regression on secondaries&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2870&quot; title=&quot;Rename wtperf checkpoint schema jobs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2870&quot;&gt;&lt;del&gt;WT-2870&lt;/del&gt;&lt;/a&gt;       Rename wtperf checkpoint schema jobs&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2871&quot; title=&quot;__wt_verbose has the wrong GCC format attributes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2871&quot;&gt;&lt;del&gt;WT-2871&lt;/del&gt;&lt;/a&gt;       __wt_verbose has the wrong GCC format attributes&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2872&quot; title=&quot;Recent stuck cache test/stress failures.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2872&quot;&gt;&lt;del&gt;WT-2872&lt;/del&gt;&lt;/a&gt;       Recent stuck cache test/stress failures.&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2873&quot; title=&quot;Refactor CRC32 code&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2873&quot;&gt;&lt;del&gt;WT-2873&lt;/del&gt;&lt;/a&gt;       Refactor CRC32 code&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2875&quot; title=&quot;Test test_wt2853_perf can run too long under valgrind&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2875&quot;&gt;&lt;del&gt;WT-2875&lt;/del&gt;&lt;/a&gt;       Test test_wt2853_perf can run too long under valgrind&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2876&quot; title=&quot;Extend wtperf to support a log like table&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2876&quot;&gt;&lt;del&gt;WT-2876&lt;/del&gt;&lt;/a&gt;       Extend wtperf to support a log like table&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2878&quot; title=&quot;Verbose changes affected performance&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2878&quot;&gt;&lt;del&gt;WT-2878&lt;/del&gt;&lt;/a&gt;       Verbose changes affected performance&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2881&quot; title=&quot;Add -Wpedantic to clang compiler warning flags&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2881&quot;&gt;&lt;del&gt;WT-2881&lt;/del&gt;&lt;/a&gt;       Add -Wpedantic to clang compiler warning flags&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2883&quot; title=&quot;wiredtiger_open with verbose=handleops recursive loop&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2883&quot;&gt;&lt;del&gt;WT-2883&lt;/del&gt;&lt;/a&gt;       wiredtiger_open with verbose=handleops recursive loop&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2885&quot; title=&quot;__wt_checkpoint_signal lint&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2885&quot;&gt;&lt;del&gt;WT-2885&lt;/del&gt;&lt;/a&gt;       __wt_checkpoint_signal lint&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2886&quot; title=&quot;Decide how in-memory configuration and eviction_dirty_target interact&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2886&quot;&gt;&lt;del&gt;WT-2886&lt;/del&gt;&lt;/a&gt;       Decide how in-memory configuration and eviction_dirty_target interact&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2888&quot; title=&quot;Switch functions to return void where possible&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2888&quot;&gt;&lt;del&gt;WT-2888&lt;/del&gt;&lt;/a&gt;       Switch functions to return void where possible&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2892&quot; title=&quot;hot backup can race with block truncate&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2892&quot;&gt;&lt;del&gt;WT-2892&lt;/del&gt;&lt;/a&gt;       hot backup can race with block truncate&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2896&quot; title=&quot;Coverity #1362535: resource leak&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2896&quot;&gt;&lt;del&gt;WT-2896&lt;/del&gt;&lt;/a&gt;       Coverity #1362535: resource leak&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2897&quot; title=&quot;Checkpoints can become corrupted on failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2897&quot;&gt;&lt;del&gt;WT-2897&lt;/del&gt;&lt;/a&gt;       Checkpoints can become corrupted on failure&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2901&quot; title=&quot;Add option to disable checkpoint dirty stepdown phase&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2901&quot;&gt;&lt;del&gt;WT-2901&lt;/del&gt;&lt;/a&gt;       Add option to disable checkpoint dirty stepdown phase&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2903&quot; title=&quot;Reduce the impact of checkpoint scrubbing on applications&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2903&quot;&gt;&lt;del&gt;WT-2903&lt;/del&gt;&lt;/a&gt;       Reduce the impact of checkpoint scrubbing on applications&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7d2acd6395ec84beca34718a75371bc11f0c9f60&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7d2acd6395ec84beca34718a75371bc11f0c9f60&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1381564" author="xgen-internal-githook" created="Mon, 12 Sep 2016 08:04:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;michaelcahill&apos;, u&apos;name&apos;: u&apos;Michael Cahill&apos;, u&apos;email&apos;: u&apos;michael.cahill@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24971&quot; title=&quot;Excessive memory held by sessions when application threads do evictions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24971&quot;&gt;&lt;del&gt;SERVER-24971&lt;/del&gt;&lt;/a&gt; Don&apos;t cache buffers after application eviction. (#2869)&lt;br/&gt;
Branch: mongodb-3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/wiredtiger/wiredtiger/commit/f98ecc9d7cb6a427eaed943f4e3f46eacdbac836&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/wiredtiger/wiredtiger/commit/f98ecc9d7cb6a427eaed943f4e3f46eacdbac836&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1346725" author="xgen-internal-githook" created="Thu, 4 Aug 2016 06:22:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;agorrod&apos;, u&apos;name&apos;: u&apos;Alex Gorrod&apos;, u&apos;email&apos;: u&apos;alexander.gorrod@mongodb.com&apos;}
&lt;p&gt;Message: Import wiredtiger-wiredtiger-2.8.0-589-ga9e9696.tar.gz from wiredtiger branch mongodb-3.4&lt;/p&gt;

&lt;p&gt;ref: d8fb874..a9e9696&lt;br/&gt;
for: 3.3.11&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24971&quot; title=&quot;Excessive memory held by sessions when application threads do evictions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24971&quot;&gt;&lt;del&gt;SERVER-24971&lt;/del&gt;&lt;/a&gt;  Excessive memory held by sessions when application threads do evictions&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-1162&quot; title=&quot;Add latency to Jenkins wtperf tests and plots&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-1162&quot;&gt;&lt;del&gt;WT-1162&lt;/del&gt;&lt;/a&gt;       Add latency to Jenkins wtperf tests and plots&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2026&quot; title=&quot;Maximum pages size at eviction too large&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2026&quot;&gt;&lt;del&gt;WT-2026&lt;/del&gt;&lt;/a&gt;       Maximum pages size at eviction too large&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2239&quot; title=&quot;Make sure LSM cursors read up to date dsk_gen, it was racing with compact&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2239&quot;&gt;&lt;del&gt;WT-2239&lt;/del&gt;&lt;/a&gt;       Make sure LSM cursors read up to date dsk_gen, it was racing with compact&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2353&quot; title=&quot;Failure to create async threads as part of a wiredtiger_open call will cause a hang&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2353&quot;&gt;&lt;del&gt;WT-2353&lt;/del&gt;&lt;/a&gt;       Failure to create async threads as part of a wiredtiger_open call will cause a hang&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2380&quot; title=&quot;Make scripts fail if code doesn&amp;#39;t match style&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2380&quot;&gt;&lt;del&gt;WT-2380&lt;/del&gt;&lt;/a&gt;       Make scripts fail if code doesn&apos;t match style&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2486&quot; title=&quot;Update make check so that it runs faster&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2486&quot;&gt;&lt;del&gt;WT-2486&lt;/del&gt;&lt;/a&gt;       Update make check so that it runs faster&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2578&quot; title=&quot;remove write barriers from the TAILQ_INSERT_XXX macros&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2578&quot;&gt;&lt;del&gt;WT-2578&lt;/del&gt;&lt;/a&gt;       remove write barriers from the TAILQ_INSERT_XXX macros&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2648&quot; title=&quot;cache-line alignment for new ports&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2648&quot;&gt;&lt;del&gt;WT-2648&lt;/del&gt;&lt;/a&gt;       cache-line alignment for new ports&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2665&quot; title=&quot;Limit allocator fragmentation in WiredTiger&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2665&quot;&gt;&lt;del&gt;WT-2665&lt;/del&gt;&lt;/a&gt;       Limit allocator fragmentation in WiredTiger&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2693&quot; title=&quot;Check open_cursor error paths for consistent handling&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2693&quot;&gt;&lt;del&gt;WT-2693&lt;/del&gt;&lt;/a&gt;       Check open_cursor error paths for consistent handling&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2708&quot; title=&quot;split child-update race with reconciliation/eviction&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2708&quot;&gt;&lt;del&gt;WT-2708&lt;/del&gt;&lt;/a&gt;       split child-update race with reconciliation/eviction&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2711&quot; title=&quot;Change statistics log configuration options&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2711&quot;&gt;&lt;del&gt;WT-2711&lt;/del&gt;&lt;/a&gt;       Change statistics log configuration options&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2728&quot; title=&quot;Don&amp;#39;t re-read log file headers during log_flush&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2728&quot;&gt;&lt;del&gt;WT-2728&lt;/del&gt;&lt;/a&gt;       Don&apos;t re-read log file headers during log_flush&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2729&quot; title=&quot;Focus eviction walks in largest trees&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2729&quot;&gt;&lt;del&gt;WT-2729&lt;/del&gt;&lt;/a&gt;       Focus eviction walks in largest trees&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2730&quot; title=&quot;cursor next/prev can return the wrong key/value pair when crossing a page boundary&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2730&quot;&gt;&lt;del&gt;WT-2730&lt;/del&gt;&lt;/a&gt;       cursor next/prev can return the wrong key/value pair when crossing a page boundary&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2731&quot; title=&quot;Raw compression can create pages that are larger than expected&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2731&quot;&gt;&lt;del&gt;WT-2731&lt;/del&gt;&lt;/a&gt;       Raw compression can create pages that are larger than expected&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2732&quot; title=&quot;Coverity analysis defect 99665: Redundant test&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2732&quot;&gt;&lt;del&gt;WT-2732&lt;/del&gt;&lt;/a&gt;       Coverity analysis defect 99665: Redundant test&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2737&quot; title=&quot;Scrub dirty pages rather than evicting them&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2737&quot;&gt;&lt;del&gt;WT-2737&lt;/del&gt;&lt;/a&gt;       Scrub dirty pages rather than evicting them&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2738&quot; title=&quot;Remove the ability to change the default checkpoint name&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2738&quot;&gt;&lt;del&gt;WT-2738&lt;/del&gt;&lt;/a&gt;       Remove the ability to change the default checkpoint name&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2739&quot; title=&quot;pluggable file systems documentation cleanups&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2739&quot;&gt;&lt;del&gt;WT-2739&lt;/del&gt;&lt;/a&gt;       pluggable file systems documentation cleanups&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2743&quot; title=&quot;Thread count statistics always report 0&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2743&quot;&gt;&lt;del&gt;WT-2743&lt;/del&gt;&lt;/a&gt;       Thread count statistics always report 0&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2744&quot; title=&quot;partial line even with line buffering set&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2744&quot;&gt;&lt;del&gt;WT-2744&lt;/del&gt;&lt;/a&gt;       partial line even with line buffering set&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2746&quot; title=&quot;track checkpoint I/O separately from eviction I/O&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2746&quot;&gt;&lt;del&gt;WT-2746&lt;/del&gt;&lt;/a&gt;       track checkpoint I/O separately from eviction I/O&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2751&quot; title=&quot;column-store statistics incorrectly calculates the number of entries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2751&quot;&gt;&lt;del&gt;WT-2751&lt;/del&gt;&lt;/a&gt;       column-store statistics incorrectly calculates the number of entries&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2752&quot; title=&quot;Fixes to zipfian wtperf workload config&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2752&quot;&gt;&lt;del&gt;WT-2752&lt;/del&gt;&lt;/a&gt;       Fixes to zipfian wtperf workload config&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2755&quot; title=&quot;flexelint configuration treats size_t as 4B type&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2755&quot;&gt;&lt;del&gt;WT-2755&lt;/del&gt;&lt;/a&gt;       flexelint configuration treats size_t as 4B type&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2756&quot; title=&quot;Upgrade the autoconf archive package to check for swig 3.0&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2756&quot;&gt;&lt;del&gt;WT-2756&lt;/del&gt;&lt;/a&gt;       Upgrade the autoconf archive package to check for swig 3.0&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2757&quot; title=&quot;Column tables behave differently when column names are provided&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2757&quot;&gt;&lt;del&gt;WT-2757&lt;/del&gt;&lt;/a&gt;       Column tables behave differently when column names are provided&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2759&quot; title=&quot;Releasing the hot-backup lock doesn&amp;#39;t require the schema lock.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2759&quot;&gt;&lt;del&gt;WT-2759&lt;/del&gt;&lt;/a&gt;       Releasing the hot-backup lock doesn&apos;t require the schema lock.&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2760&quot; title=&quot;Fix a bug in backup related to directory sync. Change the filesystem API to make durable the default&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2760&quot;&gt;&lt;del&gt;WT-2760&lt;/del&gt;&lt;/a&gt;       Fix a bug in backup related to directory sync. Change the filesystem API to make durable the default&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2762&quot; title=&quot;wtstats tool fails if checkpoint runs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2762&quot;&gt;&lt;del&gt;WT-2762&lt;/del&gt;&lt;/a&gt;       wtstats tool fails if checkpoint runs&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2763&quot; title=&quot;Unit test test_intpack failing on OSX&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2763&quot;&gt;&lt;del&gt;WT-2763&lt;/del&gt;&lt;/a&gt;       Unit test test_intpack failing on OSX&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2764&quot; title=&quot;Optimize checkpoints to reduce throughput disruption&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2764&quot;&gt;&lt;del&gt;WT-2764&lt;/del&gt;&lt;/a&gt;       Optimize checkpoints to reduce throughput disruption&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2765&quot; title=&quot;wt dump: indices need to be shown in the dump output&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2765&quot;&gt;&lt;del&gt;WT-2765&lt;/del&gt;&lt;/a&gt;       wt dump: indices need to be shown in the dump output&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2767&quot; title=&quot;test suite needs way to run an individual scenario&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2767&quot;&gt;&lt;del&gt;WT-2767&lt;/del&gt;&lt;/a&gt;       test suite needs way to run an individual scenario&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2769&quot; title=&quot;Update documentation to reflect correct limits of memory_page_max&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2769&quot;&gt;&lt;del&gt;WT-2769&lt;/del&gt;&lt;/a&gt;       Update documentation to reflect correct limits of memory_page_max&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2770&quot; title=&quot;Add statistics tracking schema operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2770&quot;&gt;&lt;del&gt;WT-2770&lt;/del&gt;&lt;/a&gt;       Add statistics tracking schema operations&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2772&quot; title=&quot;Investigate log performance testing weirdness&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2772&quot;&gt;&lt;del&gt;WT-2772&lt;/del&gt;&lt;/a&gt;       Investigate log performance testing weirdness&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2773&quot; title=&quot;search_near in indexes does not find exact matches&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2773&quot;&gt;&lt;del&gt;WT-2773&lt;/del&gt;&lt;/a&gt;       search_near in indexes does not find exact matches&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2774&quot; title=&quot;minor cleanups/improvements&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2774&quot;&gt;&lt;del&gt;WT-2774&lt;/del&gt;&lt;/a&gt;       minor cleanups/improvements&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2778&quot; title=&quot;Python test suite: make scenario initialization consistent&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2778&quot;&gt;&lt;del&gt;WT-2778&lt;/del&gt;&lt;/a&gt;       Python test suite: make scenario initialization consistent&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2779&quot; title=&quot;Raw compression created unexpectedly large pages on disk&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2779&quot;&gt;&lt;del&gt;WT-2779&lt;/del&gt;&lt;/a&gt;       Raw compression created unexpectedly large pages on disk&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2781&quot; title=&quot;Enhance bulk cursor option with an option to return immediately on contention&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2781&quot;&gt;&lt;del&gt;WT-2781&lt;/del&gt;&lt;/a&gt;       Enhance bulk cursor option with an option to return immediately on contention&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2782&quot; title=&quot;Missing a fs_directory_list_free in ex_file_system.c&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2782&quot;&gt;&lt;del&gt;WT-2782&lt;/del&gt;&lt;/a&gt;       Missing a fs_directory_list_free in ex_file_system.c&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2785&quot; title=&quot;Scrub dirty pages rather than evicting them: single-page reconciliation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2785&quot;&gt;&lt;del&gt;WT-2785&lt;/del&gt;&lt;/a&gt;       Scrub dirty pages rather than evicting them: single-page reconciliation&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2791&quot; title=&quot;Enhance OS X Evergreen unit test&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2791&quot;&gt;&lt;del&gt;WT-2791&lt;/del&gt;&lt;/a&gt;       Enhance OS X Evergreen unit test&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2793&quot; title=&quot;wtperf config improvements&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2793&quot;&gt;&lt;del&gt;WT-2793&lt;/del&gt;&lt;/a&gt;       wtperf config improvements&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2796&quot; title=&quot;Memory leak in reconciliation uncovered by stress testing &quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2796&quot;&gt;&lt;del&gt;WT-2796&lt;/del&gt;&lt;/a&gt;       Memory leak in reconciliation uncovered by stress testing&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2798&quot; title=&quot;Crash vulnerability with nojournal after create during checkpoint&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2798&quot;&gt;&lt;del&gt;WT-2798&lt;/del&gt;&lt;/a&gt;       Crash vulnerability with nojournal after create during checkpoint&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2800&quot; title=&quot;Illegal file format in test/format on PPC&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2800&quot;&gt;&lt;del&gt;WT-2800&lt;/del&gt;&lt;/a&gt;       Illegal file format in test/format on PPC&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2801&quot; title=&quot;Crash vulnerability from eviction of metadata during checkpoint&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2801&quot;&gt;&lt;del&gt;WT-2801&lt;/del&gt;&lt;/a&gt;       Crash vulnerability from eviction of metadata during checkpoint&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2802&quot; title=&quot;Transaction commit causes heap-use-after free&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2802&quot;&gt;&lt;del&gt;WT-2802&lt;/del&gt;&lt;/a&gt;       Transaction commit causes heap-use-after free&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2803&quot; title=&quot;Add verbose functionality to WT Evergreen tests&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2803&quot;&gt;&lt;del&gt;WT-2803&lt;/del&gt;&lt;/a&gt;       Add verbose functionality to WT Evergreen tests&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2804&quot; title=&quot;Don&amp;#39;t read values in a tree without a snapshot&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2804&quot;&gt;&lt;del&gt;WT-2804&lt;/del&gt;&lt;/a&gt;       Don&apos;t read values in a tree without a snapshot&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2805&quot; title=&quot;Infinite recursion if error streams fail&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2805&quot;&gt;&lt;del&gt;WT-2805&lt;/del&gt;&lt;/a&gt;       Infinite recursion if error streams fail&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2806&quot; title=&quot;wtperf allocation size off-by-one&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2806&quot;&gt;&lt;del&gt;WT-2806&lt;/del&gt;&lt;/a&gt;       wtperf allocation size off-by-one&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c4612847ed88c5e0500f0e9ecb2ecdcb49621cf1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c4612847ed88c5e0500f0e9ecb2ecdcb49621cf1&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1346669" author="xgen-internal-githook" created="Thu, 4 Aug 2016 06:08:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;michaelcahill&apos;, u&apos;name&apos;: u&apos;Michael Cahill&apos;, u&apos;email&apos;: u&apos;michael.cahill@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24971&quot; title=&quot;Excessive memory held by sessions when application threads do evictions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24971&quot;&gt;&lt;del&gt;SERVER-24971&lt;/del&gt;&lt;/a&gt; Don&apos;t cache buffers after application eviction. (#2869)&lt;br/&gt;
Branch: mongodb-3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/wiredtiger/wiredtiger/commit/f98ecc9d7cb6a427eaed943f4e3f46eacdbac836&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/wiredtiger/wiredtiger/commit/f98ecc9d7cb6a427eaed943f4e3f46eacdbac836&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1342076" author="xgen-internal-githook" created="Sat, 30 Jul 2016 00:55:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;name&apos;: u&apos;Ramon Fernandez&apos;, u&apos;email&apos;: u&apos;ramon@mongodb.com&apos;}
&lt;p&gt;Message: Import wiredtiger-wiredtiger-2.8.0-601-gdddca65.tar.gz from wiredtiger branch mongodb-3.2&lt;/p&gt;

&lt;p&gt;ref: 848e5f5..dddca65&lt;br/&gt;
for: 3.2.9&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24971&quot; title=&quot;Excessive memory held by sessions when application threads do evictions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24971&quot;&gt;&lt;del&gt;SERVER-24971&lt;/del&gt;&lt;/a&gt;  Excessive memory held by sessions when application threads do evictions&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2711&quot; title=&quot;Change statistics log configuration options&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2711&quot;&gt;&lt;del&gt;WT-2711&lt;/del&gt;&lt;/a&gt;       Change statistics log configuration options&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2730&quot; title=&quot;cursor next/prev can return the wrong key/value pair when crossing a page boundary&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2730&quot;&gt;&lt;del&gt;WT-2730&lt;/del&gt;&lt;/a&gt;       cursor next/prev can return the wrong key/value pair when crossing a page boundary&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2760&quot; title=&quot;Fix a bug in backup related to directory sync. Change the filesystem API to make durable the default&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2760&quot;&gt;&lt;del&gt;WT-2760&lt;/del&gt;&lt;/a&gt;       Fix a bug in backup related to directory sync. Change the filesystem API to make durable the default&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2798&quot; title=&quot;Crash vulnerability with nojournal after create during checkpoint&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2798&quot;&gt;&lt;del&gt;WT-2798&lt;/del&gt;&lt;/a&gt;       Crash vulnerability with nojournal after create during checkpoint&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/WT-2802&quot; title=&quot;Transaction commit causes heap-use-after free&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2802&quot;&gt;&lt;del&gt;WT-2802&lt;/del&gt;&lt;/a&gt;       PPC test/format sanitizer heap-use-after free&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8c33be6ca2523af862db28157d1b8bfdb3f6028a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8c33be6ca2523af862db28157d1b8bfdb3f6028a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1340865" author="xgen-internal-githook" created="Fri, 29 Jul 2016 06:08:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;michaelcahill&apos;, u&apos;name&apos;: u&apos;Michael Cahill&apos;, u&apos;email&apos;: u&apos;michael.cahill@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24971&quot; title=&quot;Excessive memory held by sessions when application threads do evictions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24971&quot;&gt;&lt;del&gt;SERVER-24971&lt;/del&gt;&lt;/a&gt; Don&apos;t cache buffers after application eviction. (#2869)&lt;/p&gt;

&lt;p&gt;(cherry picked from commit f98ecc9d7cb6a427eaed943f4e3f46eacdbac836)&lt;br/&gt;
Branch: mongodb-3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/wiredtiger/wiredtiger/commit/6f81f197933493aa21f88eb58dad12bf1ebcd7ff&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/wiredtiger/wiredtiger/commit/6f81f197933493aa21f88eb58dad12bf1ebcd7ff&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1340864" author="michael.cahill" created="Fri, 29 Jul 2016 06:04:28 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ramon.fernandez&quot; class=&quot;user-hover&quot; rel=&quot;ramon.fernandez&quot;&gt;ramon.fernandez&lt;/a&gt;, we&apos;re held up on a 3.3 drop by testing &amp;#8211; there are some stability and perf regression issues in the current tip of WiredTiger  develop that we want to sort out before bumping 3.3 (hopefully the next bump early next week will be WT feature complete for 3.4.0-rc0).&lt;/p&gt;

&lt;p&gt;I&apos;ll cherry-pick this onto WiredTiger&apos;s &lt;tt&gt;mongodb-3.2&lt;/tt&gt; branch now.&lt;/p&gt;</comment>
                            <comment id="1324798" author="alexander.gorrod" created="Fri, 15 Jul 2016 00:45:11 +0000"  >&lt;p&gt;This is in the WiredTiger develop branch.&lt;/p&gt;</comment>
                            <comment id="1324796" author="xgen-internal-githook" created="Fri, 15 Jul 2016 00:41:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;michaelcahill&apos;, u&apos;name&apos;: u&apos;Michael Cahill&apos;, u&apos;email&apos;: u&apos;michael.cahill@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24971&quot; title=&quot;Excessive memory held by sessions when application threads do evictions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24971&quot;&gt;&lt;del&gt;SERVER-24971&lt;/del&gt;&lt;/a&gt; Don&apos;t cache buffers after application eviction. (#2869)&lt;br/&gt;
Branch: develop&lt;br/&gt;
&lt;a href=&quot;https://github.com/wiredtiger/wiredtiger/commit/f98ecc9d7cb6a427eaed943f4e3f46eacdbac836&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/wiredtiger/wiredtiger/commit/f98ecc9d7cb6a427eaed943f4e3f46eacdbac836&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1319826" author="bruce.lucas@10gen.com" created="Mon, 11 Jul 2016 13:14:54 +0000"  >&lt;p&gt;Thanks &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=michael.cahill&quot; class=&quot;user-hover&quot; rel=&quot;michael.cahill&quot;&gt;michael.cahill&lt;/a&gt;. I should note that in addition to memory used by calls on application threads to __wt_evict via __wt_cache_eviction_worker on transaction open, I&apos;m seeing significant memory used by application thread calls to __wt_evict directly from __wt_page_in_func while reading a page into cache. Will the patch address all the paths by which application threads can do evictions?&lt;/p&gt;</comment>
                            <comment id="1319564" author="michael.cahill" created="Mon, 11 Jul 2016 06:31:13 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bruce.lucas&quot; class=&quot;user-hover&quot; rel=&quot;bruce.lucas&quot;&gt;bruce.lucas&lt;/a&gt;, you asked some questions about what is going on here:&lt;/p&gt;

&lt;blockquote&gt;
&lt;p&gt;If I&apos;m reading the code correctly, it appears that reconciliation during eviction uses buffers associated with the session which are expanded as needed (&lt;tt&gt;&amp;#95;&amp;#95;wt_buf_grow_worker&lt;/tt&gt; in the stacks above), and it appears never shrink, is that correct? If there are a large number of sessions that at one point or another get involved in evictions, and the pages are large, this could be quite a lot of memory. Couple of thoughts:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;could these buffers be temporary instead of persisting with the session? Is that done to minimize allocator churn?&lt;/li&gt;
	&lt;li&gt;maybe the buffers could be shrunk at the end of each eviction if they are larger than a certain threshold?&lt;/li&gt;
&lt;/ul&gt;
&lt;/blockquote&gt;

&lt;p&gt;You are correct that this memory is being allocated in each application session that evicts a dirty page, and the allocated memory is cached in the session.  They could be made temporary, at least for this path &amp;#8211; I suspect the code was written with checkpoint in mind, where many pages are written in a single session.  I&apos;ll work up a patch that frees this memory at the end of application thread eviction.&lt;/p&gt;</comment>
                            <comment id="1319462" author="alexander.gorrod" created="Mon, 11 Jul 2016 01:54:56 +0000"  >&lt;p&gt;Thanks for the report &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bruce.lucas&quot; class=&quot;user-hover&quot; rel=&quot;bruce.lucas&quot;&gt;bruce.lucas&lt;/a&gt;. It would be very helpful if you can provide a test case to reproduce the behavior.&lt;/p&gt;</comment>
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