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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-25180] Make latency histogram collection optional in full-time diagnostic data capture</title>
                <link>https://jira.mongodb.org/browse/SERVER-25180</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The new latency histogram facility adds a considerable amount of data to ftdc, decreasing the retention period significantly. It has limited value for the primary purpose of always-on ftdc, because mongod logs provide information about the high-latency operations which are generally of interest for after-the-fact issue analysis. Collection of latency histogram data by ftdc should be optional, off by default. It should be possible to enable capture of latency histogram data in ftdc dynamically at runtime if desired to use it for targeted performance investigations.&lt;/p&gt;</description>
                <environment></environment>
        <key id="302736">SERVER-25180</key>
            <summary>Make latency histogram collection optional in full-time diagnostic data capture</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="kyle.suarez@mongodb.com">Kyle Suarez</assignee>
                                    <reporter username="bruce.lucas@mongodb.com">Bruce Lucas</reporter>
                        <labels>
                    </labels>
                <created>Wed, 20 Jul 2016 18:54:54 +0000</created>
                <updated>Mon, 21 May 2018 17:29:49 +0000</updated>
                            <resolved>Mon, 29 Aug 2016 17:51:35 +0000</resolved>
                                                    <fixVersion>3.3.12</fixVersion>
                                    <component>Diagnostics</component>
                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="1370902" author="kyle.suarez" created="Mon, 29 Aug 2016 17:51:35 +0000"  >&lt;p&gt;Marking Documentation Changes as &quot;needed&quot;, since this changes the previous API for the histogram-related commands.&lt;/p&gt;</comment>
                            <comment id="1370895" author="xgen-internal-githook" created="Mon, 29 Aug 2016 17:49:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kevinAlbs&apos;, u&apos;name&apos;: u&apos;Kevin Albertson&apos;, u&apos;email&apos;: u&apos;kevin.albertson@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25180&quot; title=&quot;Make latency histogram collection optional in full-time diagnostic data capture&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-25180&quot;&gt;&lt;del&gt;SERVER-25180&lt;/del&gt;&lt;/a&gt; make full histogram output optional&lt;/p&gt;

&lt;p&gt;For full per-collection histograms, use the aggregation stage&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;
		&lt;tbody &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-top: 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;    { $collStats: { latencyStats: { histograms: true } } }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;For the full global histogram, invoke serverStatus with&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;
		&lt;tbody &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-top: 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;    db.serverStatus( { opLatencies: { histograms: true } } )&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/be09d7bf0a72f44f8909221f178a70a2cb0a6b68&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/be09d7bf0a72f44f8909221f178a70a2cb0a6b68&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1362589" author="kyle.suarez" created="Fri, 19 Aug 2016 20:40:19 +0000"  >&lt;p&gt;Putting this back on the backlog since &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kevin.albertson&quot; class=&quot;user-hover&quot; rel=&quot;kevin.albertson&quot;&gt;kevin.albertson&lt;/a&gt;&apos;s internship is coming to a close. Because of the downstream impact of this ticket, I&apos;ll try to get this done as soon as possible in the next iteration.&lt;/p&gt;</comment>
                            <comment id="1342847" author="bruce.lucas@10gen.com" created="Mon, 1 Aug 2016 12:27:34 +0000"  >&lt;p&gt;Note by the way that the overall stats &quot;ops&quot; and &quot;latency&quot; for each category should be retained as this is a small amount of data and will allow computing average latency which is very useful information.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10320">
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                                                                <inwardlinks description="is documented by">
                                        <issuelink>
            <issuekey id="319546">DOCS-8907</issuekey>
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                            <issuelinktype id="10012">
                    <name>Related</name>
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                                        <issuelink>
            <issuekey id="544199">SERVER-34998</issuekey>
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