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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>[DOCS-12178] Docs for SERVER-32146: Log slow oplog entry application</title>
                <link>https://jira.mongodb.org/browse/DOCS-12178</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
&lt;div class=&quot;panel&quot; style=&quot;background-color: #cccccc;border-style: dashed;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #cccccc;&quot;&gt;
&lt;h3&gt;&lt;a name=&quot;Description%3A&quot;&gt;&lt;/a&gt;Description: &lt;/h3&gt;

&lt;p&gt;This introduces logging for oplog entries that are slow to apply on secondaries. The rule is to log if the op application took longer than &quot;slowMS&quot;. This is the same threshold that we use for slow operation logging on primaries.&lt;/p&gt;

&lt;p&gt;Note that, unlike slow op logging on primaries, this feature does not come with an option to log all ops you apply. Only oplog entries considered slow to apply (i.e. above the &quot;slowMS&quot; threshold) will be logged on secondaries.&lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;EngineeringTicketDescription%3A&quot;&gt;&lt;/a&gt;Engineering Ticket Description:&lt;/h3&gt;

&lt;p&gt;We log slow operations on the primary, it would also be helpful to log slow oplog application to see what&apos;s using system resources.&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;


&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;ul&gt;
	&lt;li&gt;source/release-notes/4.2.txt
	&lt;ul&gt;
		&lt;li&gt;relnotes and others mention that the log verbosity level does not affect this logging.  As such, for now, will not update on the verbosity logging section that the setting has no effect on secondary slow oplog logging.&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;source/core/replica-set-oplog.txt&lt;/li&gt;
	&lt;li&gt;source/core/replica-set-secondary.txt&lt;/li&gt;
	&lt;li&gt;source/core/replica-set-sync.txt&lt;/li&gt;
	&lt;li&gt;source/includes/apiargs-dbcommand-profile-fields.yaml&lt;/li&gt;
	&lt;li&gt;source/includes/extracts-4.2-changes.yaml&lt;/li&gt;
	&lt;li&gt;source/includes/fact-log-slow-queries.rst&lt;/li&gt;
	&lt;li&gt;source/includes/options-mongod.yaml&lt;/li&gt;
	&lt;li&gt;source/reference/log-messages.txt&lt;/li&gt;
	&lt;li&gt;source/replication.txt&lt;/li&gt;
	&lt;li&gt;source/tutorial/manage-the-database-profiler.txt&lt;/li&gt;
	&lt;li&gt;source/administration/configuration&lt;/li&gt;
	&lt;li&gt;source/administration/monitoring.txt&lt;/li&gt;
	&lt;li&gt;source/tutorial/evaluate-operation-performance.txt&lt;/li&gt;
	&lt;li&gt;source/tutorial/troubleshoot-replica-sets.txt&lt;/li&gt;
&lt;/ul&gt;


&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;p&gt;none&lt;/p&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="627951">DOCS-12178</key>
            <summary>Docs for SERVER-32146: Log slow oplog entry application</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="13201">Fixed</resolution>
                                        <assignee username="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="kay.kim@mongodb.com">Kay Kim</reporter>
                        <labels>
                            <label>SWDI</label>
                            <label>neweng</label>
                    </labels>
                <created>Thu, 1 Nov 2018 22:46:46 +0000</created>
                <updated>Mon, 13 Nov 2023 18:29:35 +0000</updated>
                            <resolved>Thu, 29 Nov 2018 21:34:09 +0000</resolved>
                                                    <fixVersion>4.1.5</fixVersion>
                    <fixVersion>4.0.6</fixVersion>
                    <fixVersion>3.6.11</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2168577" author="xgen-internal-githook" created="Mon, 4 Mar 2019 01:33:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kay Kim&apos;, &apos;email&apos;: &apos;kay.kim@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12178&quot; title=&quot;Docs for SERVER-32146: Log slow oplog entry application&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12178&quot;&gt;&lt;del&gt;DOCS-12178&lt;/del&gt;&lt;/a&gt;: cleanup backport merge cruft&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/3827b6417a8f0588a00dc8503377eae95a986a4c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/3827b6417a8f0588a00dc8503377eae95a986a4c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2168576" author="xgen-internal-githook" created="Mon, 4 Mar 2019 01:33:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;kay&apos;, &apos;username&apos;: &apos;kay-kim&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12178&quot; title=&quot;Docs for SERVER-32146: Log slow oplog entry application&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12178&quot;&gt;&lt;del&gt;DOCS-12178&lt;/del&gt;&lt;/a&gt;: Backport to 3.6.11: secondaries log slow oplog applications&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/f2136276470a647b21a195a3177c3e094b15887e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/f2136276470a647b21a195a3177c3e094b15887e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2137896" author="xgen-internal-githook" created="Tue, 5 Feb 2019 13:07:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kay Kim&apos;, &apos;email&apos;: &apos;kay.kim@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12178&quot; title=&quot;Docs for SERVER-32146: Log slow oplog entry application&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12178&quot;&gt;&lt;del&gt;DOCS-12178&lt;/del&gt;&lt;/a&gt;: tweak last commit to include explicit for more info&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/80f0b9a66c51826e5b2cec5f8da4ee210011f3d9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/80f0b9a66c51826e5b2cec5f8da4ee210011f3d9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2137895" author="xgen-internal-githook" created="Tue, 5 Feb 2019 13:07:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;kay&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12178&quot; title=&quot;Docs for SERVER-32146: Log slow oplog entry application&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12178&quot;&gt;&lt;del&gt;DOCS-12178&lt;/del&gt;&lt;/a&gt;: Backport to 4.0.6: secondaries log slow oplog applications&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/b36b5940ce6bd33c1b7f6f39429184a7e9d4ff6f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/b36b5940ce6bd33c1b7f6f39429184a7e9d4ff6f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2115863" author="xgen-internal-githook" created="Tue, 15 Jan 2019 17:17:47 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@mongodb.com&apos;, &apos;name&apos;: &apos;Kay Kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12178&quot; title=&quot;Docs for SERVER-32146: Log slow oplog entry application&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12178&quot;&gt;&lt;del&gt;DOCS-12178&lt;/del&gt;&lt;/a&gt;: tweak last commit to include explicit for more info&lt;br/&gt;
Branch: v4.0.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/f4dfb8535acba3c2c15e2f5e85e9a930be89f2e8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/f4dfb8535acba3c2c15e2f5e85e9a930be89f2e8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2115861" author="xgen-internal-githook" created="Tue, 15 Jan 2019 17:16:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@mongodb.com&apos;, &apos;name&apos;: &apos;Kay Kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12178&quot; title=&quot;Docs for SERVER-32146: Log slow oplog entry application&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12178&quot;&gt;&lt;del&gt;DOCS-12178&lt;/del&gt;&lt;/a&gt;: part2 &amp;#8211; tweaks to incorporate the backport/availability in 4.0.6&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/4738ad043ab1a91e62f5cc97c70e89bf9d935e65&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/4738ad043ab1a91e62f5cc97c70e89bf9d935e65&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2115809" author="xgen-internal-githook" created="Tue, 15 Jan 2019 16:48:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;kay-kim&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;name&apos;: &apos;kay&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12178&quot; title=&quot;Docs for SERVER-32146: Log slow oplog entry application&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12178&quot;&gt;&lt;del&gt;DOCS-12178&lt;/del&gt;&lt;/a&gt;: Backport to 4.0.6: secondaries log slow oplog applications&lt;br/&gt;
Branch: v4.0.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/cb347c558086d02c36e263de776a4e5984370c08&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/cb347c558086d02c36e263de776a4e5984370c08&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2076060" author="xgen-internal-githook" created="Thu, 29 Nov 2018 21:32:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;kay&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12178&quot; title=&quot;Docs for SERVER-32146: Log slow oplog entry application&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12178&quot;&gt;&lt;del&gt;DOCS-12178&lt;/del&gt;&lt;/a&gt;: 4.2 secondaries log slow oplog applications&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/27dcdb35185dc4f96b99020c6eed45c78889811f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/27dcdb35185dc4f96b99020c6eed45c78889811f&lt;/a&gt;&lt;/p&gt;</comment>
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