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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>
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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-48402] Add current values of socket metrics to collected metrics</title>
                <link>https://jira.mongodb.org/browse/SERVER-48402</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;System network metrics currently include things like &quot;Tcp ActiveOpens&quot; and &quot;TcpExt TW&quot;.&lt;/p&gt;

&lt;p&gt;It would be helpful to also have current values for active, as well as TIME_WAIT and CLOSE_WAIT.  It would help in investigating issues where the number of active connections, or connections in TIME_WAIT hit high levels.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1362064">SERVER-48402</key>
            <summary>Add current values of socket metrics to collected metrics</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="george.wangensteen@mongodb.com">George Wangensteen</assignee>
                                    <reporter username="eric.sommer@mongodb.com">Eric Sommer</reporter>
                        <labels>
                            <label>bkp</label>
                    </labels>
                <created>Tue, 26 May 2020 08:43:36 +0000</created>
                <updated>Sun, 29 Oct 2023 22:07:49 +0000</updated>
                            <resolved>Thu, 3 Aug 2023 20:27:40 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="5616150" author="xgen-internal-githook" created="Mon, 7 Aug 2023 02:40:06 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;George Wangensteen&apos;, &apos;email&apos;: &apos;george.wangensteen@mongodb.com&apos;, &apos;username&apos;: &apos;gewa24&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48402&quot; title=&quot;Add current values of socket metrics to collected metrics&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48402&quot;&gt;&lt;del&gt;SERVER-48402&lt;/del&gt;&lt;/a&gt; Add sockstat metrics to FTDC system collector on linux&lt;br/&gt;
Branch: minh.luu-no_compile_sys-perf&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d2080ff2b5af04a3dbe5fd0fd0ab467da42e473e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d2080ff2b5af04a3dbe5fd0fd0ab467da42e473e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5611559" author="xgen-internal-githook" created="Thu, 3 Aug 2023 20:18:22 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;George Wangensteen&apos;, &apos;email&apos;: &apos;george.wangensteen@mongodb.com&apos;, &apos;username&apos;: &apos;gewa24&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48402&quot; title=&quot;Add current values of socket metrics to collected metrics&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48402&quot;&gt;&lt;del&gt;SERVER-48402&lt;/del&gt;&lt;/a&gt; Add sockstat metrics to FTDC system collector on linux&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d2080ff2b5af04a3dbe5fd0fd0ab467da42e473e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d2080ff2b5af04a3dbe5fd0fd0ab467da42e473e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4262717" author="JIRAUSER1262719" created="Tue, 21 Dec 2021 21:33:15 +0000"  >&lt;p&gt;We haven&#8217;t heard back from you in at least 1 year, so I&apos;m going to close this ticket. If this is still an issue for you, please provide additional information and we will reopen the ticket.&lt;/p&gt;</comment>
                            <comment id="3106591" author="bruce.lucas@10gen.com" created="Tue, 26 May 2020 12:31:01 +0000"  >&lt;p&gt;The counters you mention are cumulative counters of the events they refer to, but I think what you&apos;re actually asking for is current values for established connections, connections in time_wait, and connections in close_wait.&lt;/p&gt;

&lt;p&gt;The current number of currently established connections is available as CurrEstab.&lt;/p&gt;

&lt;p&gt;I&apos;m not sure whether number of sockets in time_wait and close_wait is readily available for reporting in ftdc, but it may be in /proc/net/sockstat. Some &lt;a href=&quot;https://stackoverflow.com/questions/55405727/in-proc-sockstat-which-tcp-states-count-as-inuse-and-which-count-as-alloc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;investigation&lt;/a&gt; may be needed to determine what those counters mean.&lt;/p&gt;</comment>
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                            <attachment id="466036" name="Screenshot from 2023-07-31 15-17-42.png" size="70152" author="george.wangensteen@mongodb.com" created="Mon, 31 Jul 2023 19:20:09 +0000"/>
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                            <customfieldvalue>This patch adds new metrics to FTDC&amp;#39;s systemMetrics section on linux that are gathered from /proc/net/sockstat. In particular, it adds: &lt;br/&gt;
&lt;br/&gt;
sockets: used - the total number of sockets currently open/active at the OS level on the machine&lt;br/&gt;
&lt;br/&gt;
TCP: alloc - the total number of currently allocated TCP sockets on the machine&lt;br/&gt;
&lt;br/&gt;
TCP: inuse - the total number of currently in use TCP sockets on the machine&lt;br/&gt;
&lt;br/&gt;
TCP: inuse - the total number of current orphaned TCP sockets on the machine. Orphaned sockets are those that are still open at the OS level/have not been destroyed, but don&amp;#39;t have any open file descriptors corresponding to them (and therefore are not accessible by any process/have already been closed at the process leve. &lt;br/&gt;
&lt;br/&gt;
TCP: tw - the total number of TCP sockets currently in the &amp;quot;TIMED_WAIT&amp;quot; TCP-state on the macine. &lt;br/&gt;
&lt;br/&gt;
The linked server ticket has a screenshot showing how these metrics appear today in t2. We should probably add descriptors so they don&amp;#39;t show up as unknown and show up as counters instead of rates. </customfieldvalue>

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