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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-47644] Enable Latency Stats in FTDC</title>
                <link>https://jira.mongodb.org/browse/SERVER-47644</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&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; suggests an option such as &lt;tt&gt;diagnosticDataCollectionEnableLatencyHistograms&lt;/tt&gt; to enable FTDC collection of latency histograms. However this does not seem to be implemented.&lt;/p&gt;

&lt;p&gt;Adding histogram buckets &amp;lt;=&#160;&lt;tt&gt;slowms&lt;/tt&gt; would allow for a better understanding of latency spikes and response time distributions.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1319868">SERVER-47644</key>
            <summary>Enable Latency Stats in FTDC</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="13201">Fixed</resolution>
                                        <assignee username="mark.benvenuto@mongodb.com">Mark Benvenuto</assignee>
                                    <reporter username="kevin.arhelger@mongodb.com">Kevin Arhelger</reporter>
                        <labels>
                    </labels>
                <created>Fri, 17 Apr 2020 21:44:47 +0000</created>
                <updated>Sun, 29 Oct 2023 22:09:18 +0000</updated>
                            <resolved>Thu, 7 May 2020 23:15:50 +0000</resolved>
                                    <version>3.6.17</version>
                    <version>4.2.6</version>
                    <version>4.0.18</version>
                    <version>4.4.0-rc1</version>
                                    <fixVersion>4.4.0-rc5</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                    <component>Diagnostics</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="3076459" author="xgen-internal-githook" created="Fri, 8 May 2020 19:43:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47644&quot; title=&quot;Enable Latency Stats in FTDC&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47644&quot;&gt;&lt;del&gt;SERVER-47644&lt;/del&gt;&lt;/a&gt; Enable Histogram Latency Stats in FTDC&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 049b10ad31be3233130dbf4313b6be4a3ecd47c9)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/07b6549afa70178570b0af93f536db1b8c5643a3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/07b6549afa70178570b0af93f536db1b8c5643a3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3074548" author="xgen-internal-githook" created="Thu, 7 May 2020 19:08:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47644&quot; title=&quot;Enable Latency Stats in FTDC&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47644&quot;&gt;&lt;del&gt;SERVER-47644&lt;/del&gt;&lt;/a&gt; Enable Histogram Latency Stats in FTDC&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/049b10ad31be3233130dbf4313b6be4a3ecd47c9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/049b10ad31be3233130dbf4313b6be4a3ecd47c9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3067979" author="bruce.lucas@10gen.com" created="Mon, 4 May 2020 20:05:37 +0000"  >&lt;p&gt;Not a strong opinion. Option 3 would mean that the last bucket would have a different meaning from the bucket of the same name in the unfiltered histogram. On the other hand it conveys useful information, and I think it is currently the case that the last bucket in the unfiltered histogram is everything larger than the next to last? If so option 3 would be consistent with that and I think would be preferable on the whole.&lt;/p&gt;</comment>
                            <comment id="3063138" author="kevin.arhelger" created="Thu, 30 Apr 2020 18:37:31 +0000"  >&lt;p&gt;I am fine with either 2 (updated CR) or 3. 3 might be slightly less confusing for new users of FTDC.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bruce.lucas&quot; class=&quot;user-hover&quot; rel=&quot;bruce.lucas&quot;&gt;bruce.lucas&lt;/a&gt; do you have a strong opinion either way?&lt;/p&gt;</comment>
                            <comment id="3061222" author="mark.benvenuto" created="Wed, 29 Apr 2020 19:58:29 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kevin.arhelger&quot; class=&quot;user-hover&quot; rel=&quot;kevin.arhelger&quot;&gt;kevin.arhelger&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bruce.lucas&quot; class=&quot;user-hover&quot; rel=&quot;bruce.lucas&quot;&gt;bruce.lucas&lt;/a&gt;, here some possible choices for how the buckets will get logged in FTDC when the flag is enabled.&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;All the buckets (not the preferred choice, original CR)&lt;/li&gt;
	&lt;li&gt;Only the buckets &amp;lt;= slowMs (updated CR)&lt;/li&gt;
	&lt;li&gt;Only the buckets &amp;lt;= slowMs + one bucket for &amp;gt; slowMS. This bucket would be labeled &lt;tt&gt;int(slowMS+1)&lt;/tt&gt;&lt;/li&gt;
	&lt;li&gt;Only the buckets &amp;gt;= slowMs&lt;/li&gt;
	&lt;li&gt;Some other choice.&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;Let me know what kind of filtering you would like.&lt;/p&gt;</comment>
                            <comment id="3056687" author="bruce.lucas@10gen.com" created="Mon, 27 Apr 2020 15:38:40 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kevin.arhelger&quot; class=&quot;user-hover&quot; rel=&quot;kevin.arhelger&quot;&gt;kevin.arhelger&lt;/a&gt; your ask on this ticket was for histogram buckets &amp;lt;= slowms, but the current code review adds all of the histogram buckets. I think this will have a substantially greater impact on ftdc than your initial ask. Do you think this is still workable from a perspective of retention and impact on consuming tools?&lt;/p&gt;</comment>
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