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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-11965] Docs for SERVER-23332: Expose query plan cache key in system.profile entry and query log lines</title>
                <link>https://jira.mongodb.org/browse/DOCS-11965</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;----------------------------&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;OriginalDescription&quot;&gt;&lt;/a&gt;Original Description&lt;/h2&gt;
&lt;blockquote&gt;
&lt;h3&gt;&lt;a name=&quot;Description%3A&quot;&gt;&lt;/a&gt;Description:&lt;/h3&gt;

&lt;p&gt;The &quot;queryHash&quot; is now present in slow query log lines and in system.profile output. We may wish to document this in pages about these debug mechanisms. All queries with the same hash are considered the same &quot;shape&quot;, and use the same plan cache entry. This may be useful for diagnosing issues around query performance. Please ask Storch for more details, and to review any proposed documentation changes.&lt;/p&gt;

&lt;p&gt;Note that &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35981&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-35981&lt;/a&gt; added this same &apos;queryHash&apos; to the plan cache introspection commands output, and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36527&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-36527&lt;/a&gt; added it to explain output.&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;It would be nice if we included a hash of all queries (without their binds) so we can get a sense for unique types of queries being run on a system and to be able to get a better performance profile for &quot;bad&quot; queries. If we could add that hash into the mongod.log we can easily &quot;group&quot; queries for prioritization when telling the customer what to &quot;tweak&quot;.&lt;/p&gt;&lt;/blockquote&gt;
&lt;p&gt;----------------------------&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
&lt;h2&gt;&lt;a name=&quot;Scopeofchanges%28filesthatneedworkandhowmuch%29&quot;&gt;&lt;/a&gt;Scope of changes (files that need work and how much)&lt;/h2&gt;

&lt;p&gt;&#160;&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;4.2 &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/check.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/li&gt;
	&lt;li&gt;tutorial/manage-the-database-profiler &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/check.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/li&gt;
	&lt;li&gt;/reference/database-profiler&#160; &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/check.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/li&gt;
	&lt;li&gt;source/tutorial/evaluate-operation-performance.txt &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/check.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/li&gt;
	&lt;li&gt;administration/analyzing-mongodb-performance &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/check.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/li&gt;
	&lt;li&gt;&lt;del&gt;source/includes/fact-log-slow-queries.rst&lt;/del&gt;&lt;/li&gt;
	&lt;li&gt;&lt;del&gt;source/includes/options-mongod.yaml&lt;/del&gt;&lt;/li&gt;
	&lt;li&gt;source/reference/log-messages.txt &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/check.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/li&gt;
	&lt;li&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;h2&gt;&lt;a name=&quot;Impacttootherdocsoutsideofthisproduct&quot;&gt;&lt;/a&gt;Impact to other docs outside of this product&lt;/h2&gt;
&lt;h2&gt;&lt;a name=&quot;MVP%28workanddate%3F%29&quot;&gt;&lt;/a&gt;MVP (work and date?)&lt;/h2&gt;
&lt;h2&gt;&lt;a name=&quot;Resources%28e.g.ScopeDocs%2CInvision%29&quot;&gt;&lt;/a&gt;Resources (e.g. Scope Docs, Invision)&lt;/h2&gt;</description>
                <environment></environment>
        <key id="587613">DOCS-11965</key>
            <summary>Docs for SERVER-23332: Expose query plan cache key in system.profile entry and query log lines</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>
                    </labels>
                <created>Mon, 13 Aug 2018 17:25:22 +0000</created>
                <updated>Mon, 13 Nov 2023 18:32:49 +0000</updated>
                            <resolved>Thu, 31 Jan 2019 00:19:32 +0000</resolved>
                                                    <fixVersion>4.1.2</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="2132835" author="xgen-internal-githook" created="Thu, 31 Jan 2019 00:17:08 +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-11962&quot; title=&quot;Docs for SERVER-35981: Include hash of plan cache key in planCacheListShapes and planCacheListPlans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11962&quot;&gt;&lt;del&gt;DOCS-11962&lt;/del&gt;&lt;/a&gt;,&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12387&quot; title=&quot;Docs for SERVER-33303: Modifying indexes impacts application of index filters&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12387&quot;&gt;&lt;del&gt;DOCS-12387&lt;/del&gt;&lt;/a&gt;,&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11959&quot; title=&quot;Docs for SERVER-36527: Include queryHash in explain output&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11959&quot;&gt;&lt;del&gt;DOCS-11959&lt;/del&gt;&lt;/a&gt;,&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11965&quot; title=&quot;Docs for SERVER-23332: Expose query plan cache key in system.profile entry and query log lines&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11965&quot;&gt;&lt;del&gt;DOCS-11965&lt;/del&gt;&lt;/a&gt;: queryHash and planCacheKey&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/0e367a666aac090a7ed617e20309a1b1760911b7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/0e367a666aac090a7ed617e20309a1b1760911b7&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                    <name>Documented</name>
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                                        <issuelink>
            <issuekey id="274826">SERVER-23332</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
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                                                        </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="592875">DOCS-11982</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="676738">DOCS-12387</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="587606">DOCS-11959</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="587610">DOCS-11962</issuekey>
        </issuelink>
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