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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-16065] Long flush pauses in MMAPv1</title>
                <link>https://jira.mongodb.org/browse/SERVER-16065</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Reducing contention on GroupCommit mutex (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15950&quot; title=&quot;Reduce contention on groupCommitMutex in MMAP V1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15950&quot;&gt;&lt;del&gt;SERVER-15950&lt;/del&gt;&lt;/a&gt;) exposed a problem in flushing code.&lt;br/&gt;
The attached VTune lock profiler analysis shows that most of the actual lock wait contention  (time-wise) is because of long flush times, as visible from the following callstacks:&lt;/p&gt;

&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod!boost::condition_variable::timed_wait+0xf4 - condition_variable.hpp:74&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod!timed_wait&amp;lt;boost::date_time::subsecond_duration&amp;lt;boost::posix_time::time_duration,&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1000ll&amp;gt; &amp;gt;+0x296 - condition_variable_fwd.hpp:72&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod!mongo::CondVarLockGrantNotification::wait+0xa8 - lock_state.cpp:270&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod!timed_wait&amp;lt;boost::date_time::subsecond_duration&amp;lt;boost::posix_time::time_duration,&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod!mongo::CondVarLockGrantNotification::wait+0xa8 - lock_state.cpp:270&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod!mongo::Lock::DBLock::lockDB+0x2c - d_concurrency.cpp:227&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod!mongo::Lock::DBLock::DBLock+0xcd - d_concurrency.cpp:217&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod!mongo::WriteBatchExecutor::ExecInsertsState::_lockAndCheckImpl+0x16d&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;- batch_executor.cpp:954&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod!lockAndCheck+0x101 - batch_executor.cpp:1009&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod!mongo::WriteBatchExecutor::execOneInsert+0x5f - batch_executor.cpp:1063&lt;/span&gt;&lt;/pre&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;This is not an actual lock contention, but just long flush times. &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kaloian.manassiev&quot; class=&quot;user-hover&quot; rel=&quot;kaloian.manassiev&quot;&gt;kaloian.manassiev&lt;/a&gt; suggests this could be made better by flushing more often and some other small optimizations.&lt;/p&gt;</description>
                <environment></environment>
        <key id="168420">SERVER-16065</key>
            <summary>Long flush pauses in MMAPv1</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="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="davide.italiano">Davide Italiano</reporter>
                        <labels>
                            <label>28qa</label>
                    </labels>
                <created>Tue, 11 Nov 2014 01:03:38 +0000</created>
                <updated>Fri, 23 Jan 2015 23:35:14 +0000</updated>
                            <resolved>Wed, 21 Jan 2015 15:41:59 +0000</resolved>
                                                    <fixVersion>3.0.0-rc6</fixVersion>
                                    <component>Concurrency</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="809527" author="xgen-internal-githook" created="Wed, 21 Jan 2015 15:40:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5080&quot; title=&quot;journal rotates while dbMutex is held&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5080&quot;&gt;&lt;del&gt;SERVER-5080&lt;/del&gt;&lt;/a&gt; Write MMAP V1 journal in a separate thread&lt;/p&gt;

&lt;p&gt;Offloads the writing of the journal to disk to a separate thread, so that&lt;br/&gt;
when the journal lock is dropped we can immediately loop back and pick up&lt;br/&gt;
the next batch of changes.&lt;/p&gt;

&lt;p&gt;This allows the journal write to be parallelized with concurrent workload&lt;br/&gt;
once the intents list has been materialized.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f346c4ad0c2d892014c79d7adbbca61031f50194&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f346c4ad0c2d892014c79d7adbbca61031f50194&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="806388" author="xgen-internal-githook" created="Fri, 16 Jan 2015 15:12:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; Fix indentation in CommitJob&lt;/p&gt;

&lt;p&gt;No functional changes.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1ff892ae9306bec0a6dbbee1eac7edd3791f1eec&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1ff892ae9306bec0a6dbbee1eac7edd3791f1eec&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="806387" author="xgen-internal-githook" created="Fri, 16 Jan 2015 15:12:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; Cleanup CommitJob and RecoveryJob so there is encapsulation&lt;/p&gt;

&lt;p&gt;No functional changes.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ec08d1f900830ecf629dc34a2381ed1c599d02db&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ec08d1f900830ecf629dc34a2381ed1c599d02db&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="802414" author="xgen-internal-githook" created="Mon, 12 Jan 2015 16:18:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; Move AlignedBuilder under MMAP V1&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/77065ddd70015350e20a876f6174ebd45148cce6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/77065ddd70015350e20a876f6174ebd45148cce6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="802413" author="xgen-internal-githook" created="Mon, 12 Jan 2015 16:18:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; Move stuff out of CommitJob and into dur.cpp&lt;/p&gt;

&lt;p&gt;No need to duplicate this functionality.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9566e29b1dd85ada54d5a5924d8f3f38c517a74f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9566e29b1dd85ada54d5a5924d8f3f38c517a74f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="799597" author="xgen-internal-githook" created="Wed, 7 Jan 2015 22:29:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; MMAP V1 remap always&lt;/p&gt;

&lt;p&gt;We cannot remap selectively, because we now do not have a way to apply&lt;br/&gt;
back-pressure on the inserts coming in while journal I/O is happening&lt;br/&gt;
outside of the flush lock. That way if the journal I/O (WRITETOJOURNAL)&lt;br/&gt;
takes long time, we end up accumulating too much data in memory and&lt;br/&gt;
triggering rate limiting wassert.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2215b74a686290b97c90b27831f4d306b50f97da&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2215b74a686290b97c90b27831f4d306b50f97da&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="799573" author="kaloian.manassiev" created="Wed, 7 Jan 2015 22:09:11 +0000"  >&lt;p&gt;Need to reopen and pull out of RC5, because we now do not have a way to apply back-pressure on the inserts coming in while journal I/O is happening outside of a lock. That way if the journal I/O (WRITETOJOURNAL) takes long time, we end up accumulating too much data in memory.&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2015-01-07T21:18:37.901 0000 I -        [journal] warning assertion failure a &amp;lt;= 256*1024*1024 src/mongo/util/alignedbuilder.cpp 109&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2015-01-07T21:18:37.907 0000 I CONTROL  [journal] &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;----- BEGIN BACKTRACE -----&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; dbtest(mongo::printStackTrace(std::ostream&amp;amp;) 0x29) [0x141a4e9]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; dbtest(mongo::logContext(char const*) 0xE1) [0x13bd3a1]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; dbtest(mongo::wasserted(char const*, char const*, unsigned int) 0x199) [0x13a31d9]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; dbtest(mongo::AlignedBuilder::growReallocate(unsigned int) 0x4D) [0x13a27ad]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; dbtest( 0xDCBC21) [0x11cbc21]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; dbtest(mongo::dur::PREPLOGBUFFER(mongo::dur::JSectHeader&amp;amp;, mongo::AlignedBuilder&amp;amp;) 0x204) [0x11cc094]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; dbtest( 0xDC3070) [0x11c3070]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; dbtest( 0x1066104) [0x1466104]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; libpthread.so.0( 0x8182) [0x7f0c61afe182]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; libc.so.6(clone 0x6D) [0x7f0c605c6efd]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;-----  END BACKTRACE  -----&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2015-01-07T21:18:38.019 0000 I -        [journal] rate limiting wassert&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="798504" author="kaloian.manassiev" created="Tue, 6 Jan 2015 22:07:23 +0000"  >&lt;p&gt;Marking this as needed CAP verification, because we need to verify that the flush pauses are going down now.&lt;/p&gt;</comment>
                            <comment id="798501" author="xgen-internal-githook" created="Tue, 6 Jan 2015 22:04:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; Drop flush lock early if not doing remap&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/143765cfe3fa006c7109e409abd4a14eb6b36c2e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/143765cfe3fa006c7109e409abd4a14eb6b36c2e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="798500" author="xgen-internal-githook" created="Tue, 6 Jan 2015 22:04:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; Some formatting changes and comments&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/50c0c4491c856cf4217fd36057066d09281a96d8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/50c0c4491c856cf4217fd36057066d09281a96d8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="797489" author="xgen-internal-githook" created="Mon, 5 Jan 2015 20:51:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; Check for private/shared view match before remap&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9bfa0cc0f41dc8d425263cbf841f62b3e9d484da&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9bfa0cc0f41dc8d425263cbf841f62b3e9d484da&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="797488" author="xgen-internal-githook" created="Mon, 5 Jan 2015 20:51:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; Move code around and add comments in dur.cpp&lt;/p&gt;

&lt;p&gt;There are no functional changes, just adding comments and moving code&lt;br/&gt;
around to ease the change to early release the flush lock if we will&lt;br/&gt;
not be doing a remap.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f07504b53a284c7d4fa380c08b104c99a660a6bd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f07504b53a284c7d4fa380c08b104c99a660a6bd&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="796349" author="xgen-internal-githook" created="Fri, 2 Jan 2015 20:42:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; Get rid of the groupCommit method&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3bc56205c727f7a85da6a3c0321abaa782318a38&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3bc56205c727f7a85da6a3c0321abaa782318a38&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="796243" author="xgen-internal-githook" created="Fri, 2 Jan 2015 17:12:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt; Cleanup the MMAP V1 durability code&lt;/p&gt;

&lt;p&gt;No functional changes, just organizing declarations and cleaning up&lt;br/&gt;
includes.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0d93899c9031cfb776bad7e1b0f6ab9703fb2aea&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0d93899c9031cfb776bad7e1b0f6ab9703fb2aea&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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