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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DOCS-8263] Operation latency histogram</title>
                <link>https://jira.mongodb.org/browse/DOCS-8263</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h4&gt;&lt;a name=&quot;Summary&quot;&gt;&lt;/a&gt;Summary&lt;/h4&gt;
&lt;p&gt;Provide a low-cost histogram in mongod that measures the execution time of reads, writes, and database commands.&lt;/p&gt;

&lt;h4&gt;&lt;a name=&quot;Motivation&quot;&gt;&lt;/a&gt;Motivation&lt;/h4&gt;
&lt;p&gt;Currently, there is only a limited number of ways to inspect the performance of a running MongoDB instance. While the system profiler does provide detailed information about &#8220;slow&#8221; operations, profiling all operations is prohibitively expensive. This project aims to implement a lightweight histogram component in the database with negligible runtime impact, which would allow it to be on by default and allow all operations to be recorded in a useful fashion. The global histogram output will also be included in serverStatus statistics.&lt;/p&gt;

&lt;h4&gt;&lt;a name=&quot;Documentation&quot;&gt;&lt;/a&gt;Documentation&lt;/h4&gt;
&lt;p&gt;&lt;a href=&quot;https://docs.google.com/document/d/1eUhOE9GbRTQvi4dbUNPyw_xRikUgFrSp9hNapl7zKGo/edit#heading=h.34rg07y6hpzs&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Scope Document&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://docs.google.com/document/d/13hdWltdOwi-TNG-2G4FLNK9jmFFpZEVb0WfAxpdvkGc/edit#heading=h.1h9ehcpd8mvj&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Design Document&lt;/a&gt;&lt;/p&gt;

&lt;h4&gt;&lt;a name=&quot;DocsChanges&quot;&gt;&lt;/a&gt;Docs Changes&lt;/h4&gt;
&lt;ul&gt;
	&lt;li&gt;$collStats aggregation stage&lt;/li&gt;
	&lt;li&gt;db.collection.latencyStats() shell helper&lt;/li&gt;
	&lt;li&gt;serverStatus.metrics change&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="300364">DOCS-8263</key>
            <summary>Operation latency histogram</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="andrew.aldridge@mongodb.com">Andrew Aldridge</assignee>
                                    <reporter username="ramon.fernandez@mongodb.com">Ramon Fernandez Marina</reporter>
                        <labels>
                    </labels>
                <created>Tue, 12 Jul 2016 15:53:22 +0000</created>
                <updated>Tue, 6 Dec 2022 07:07:21 +0000</updated>
                            <resolved>Tue, 8 Nov 2016 18:38:38 +0000</resolved>
                                                    <fixVersion>3.4 Core Server</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1429848" author="xgen-internal-githook" created="Wed, 9 Nov 2016 00:22:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;i80and&apos;, u&apos;name&apos;: u&apos;Andrew Aldridge&apos;, u&apos;email&apos;: u&apos;i80and@foxquill.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-8263&quot; title=&quot;Operation latency histogram&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-8263&quot;&gt;&lt;del&gt;DOCS-8263&lt;/del&gt;&lt;/a&gt;: latencyStats part 2&lt;/p&gt;

&lt;p&gt;Signed-off-by: kay &amp;lt;kay.kim@10gen.com&amp;gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/d82a552b42fed90968b5c817685a75f83b522d0a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/d82a552b42fed90968b5c817685a75f83b522d0a&lt;/a&gt;&lt;/p&gt;</comment>
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