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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>
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<item>
            <title>[SERVER-16517] Secondary on 2.8.0rc2 cannot keep up (insert-heavy, mmapv1) (mms-prod-queues)</title>
                <link>https://jira.mongodb.org/browse/SERVER-16517</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It seems that for this particular workload, this problem is reproducible.  So, please let me know what information would be helpful, and we can gather it.&lt;/p&gt;

&lt;p&gt;For now, we are going to downgrade this secondary.&lt;/p&gt;

&lt;p&gt;In the opcounters chart:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Top line: insert&lt;/li&gt;
	&lt;li&gt;Second line: query&lt;/li&gt;
	&lt;li&gt;Third line: command&lt;/li&gt;
	&lt;li&gt;Fourth line: update&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;&lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/attachment/59384/59384_repllag.png&quot; width=&quot;90%&quot; style=&quot;border: 0px solid black&quot; /&gt;&lt;/span&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="174132">SERVER-16517</key>
            <summary>Secondary on 2.8.0rc2 cannot keep up (insert-heavy, mmapv1) (mms-prod-queues)</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="schwerin@mongodb.com">Andy Schwerin</assignee>
                                    <reporter username="cailin.nelson@mongodb.com">Cailin Nelson</reporter>
                        <labels>
                    </labels>
                <created>Thu, 11 Dec 2014 23:09:03 +0000</created>
                <updated>Fri, 16 Jan 2015 04:33:35 +0000</updated>
                            <resolved>Wed, 14 Jan 2015 20:13:04 +0000</resolved>
                                    <version>2.8.0-rc2</version>
                                    <fixVersion>2.8.0-rc5</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>17</watches>
                                                                                                                <comments>
                            <comment id="806147" author="cailin.nelson@10gen.com" created="Fri, 16 Jan 2015 04:33:35 +0000"  >&lt;p&gt;Yay!&lt;/p&gt;</comment>
                            <comment id="804648" author="schwerin" created="Wed, 14 Jan 2015 20:13:04 +0000"  >&lt;p&gt;All signs indicate that this is resolved by the fix for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16829&quot; title=&quot;Expose tcmalloc runtime configuration options through setParameter mechanism&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16829&quot;&gt;&lt;del&gt;SERVER-16829&lt;/del&gt;&lt;/a&gt;, specifically the part that raises the ceiling on the total amount of RAM in per-thread free lists for tcmalloc from 32MB to 64MB.&lt;/p&gt;</comment>
                            <comment id="803825" author="xgen-internal-githook" created="Tue, 13 Jan 2015 22:40:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;andy10gen&apos;, u&apos;name&apos;: u&apos;Andy Schwerin&apos;, u&apos;email&apos;: u&apos;schwerin@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16829&quot; title=&quot;Expose tcmalloc runtime configuration options through setParameter mechanism&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16829&quot;&gt;&lt;del&gt;SERVER-16829&lt;/del&gt;&lt;/a&gt; Expose tcmalloc configuration options for per-thread cache size and decommit behavior.&lt;/p&gt;

&lt;p&gt;Also, increases the default cap on the sum of all per-thread cache sizes from&lt;br/&gt;
32MB to 64MB, as advised by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16551&quot; title=&quot;tcmalloc ReleaseToCentralCache account &amp;gt; 14% usage with long insert traffic&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16551&quot;&gt;&lt;del&gt;SERVER-16551&lt;/del&gt;&lt;/a&gt;.  Should improve behavior of&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16517&quot; title=&quot;Secondary on 2.8.0rc2 cannot keep up (insert-heavy, mmapv1) (mms-prod-queues)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16517&quot;&gt;&lt;del&gt;SERVER-16517&lt;/del&gt;&lt;/a&gt;, as well.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a6ca16f211fe01d2870593d9ab9bfaaa88097a14&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a6ca16f211fe01d2870593d9ab9bfaaa88097a14&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="175113">SERVER-16574</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="174611">SERVER-16551</issuekey>
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                            <attachment id="60513" name="queues_2014-12-28.png" size="267365" author="cailin.nelson@mongodb.com" created="Mon, 29 Dec 2014 03:30:24 +0000"/>
                            <attachment id="60560" name="queues_2014-12-29.png" size="76914" author="cailin.nelson@mongodb.com" created="Mon, 29 Dec 2014 22:09:51 +0000"/>
                            <attachment id="59384" name="repllag.png" size="174123" author="cailin.nelson@mongodb.com" created="Thu, 11 Dec 2014 23:09:03 +0000"/>
                            <attachment id="59562" name="repllag2.png" size="165560" author="cailin.nelson@mongodb.com" created="Sat, 13 Dec 2014 15:46:42 +0000"/>
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