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    <title>MongoDB Jira</title>
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    <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-9502] Docs for SERVER-21818: Capture system metrics in FTDC</title>
                <link>https://jira.mongodb.org/browse/DOCS-9502</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;Engineering Ticket Description:&lt;/p&gt;

&lt;p&gt;Currently full-time data capture only includes internal metrics (with a small number of exceptions). It would be useful to also capture system metrics related to cpu, memory, and storage. For illustrative purposes attached is a POC data capture tool sysmon.py that captures such information on Linux from /proc/stat, /proc/meminfo, and /sys/block/*/stat that has proven useful for problem diagnosis. Captured information includes the following:&lt;/p&gt;

&lt;p&gt;&lt;b&gt;/proc/stat&lt;/b&gt;&lt;br/&gt;
cpu_user&lt;br/&gt;
cpu_nice&lt;br/&gt;
cpu_system&lt;br/&gt;
cpu_idle&lt;br/&gt;
cpu_iowait&lt;br/&gt;
cpu_irq&lt;br/&gt;
cpu_softirq&lt;br/&gt;
cpu_steal&lt;br/&gt;
cpu_guest&lt;br/&gt;
cpu_guest_nice&lt;br/&gt;
ctxt&lt;br/&gt;
btime&lt;br/&gt;
processes&lt;br/&gt;
procs_running&lt;br/&gt;
procs_blocked&lt;br/&gt;
cpus&lt;/p&gt;

&lt;p&gt;&lt;b&gt;/proc/meminfo&lt;/b&gt;&lt;br/&gt;
memtotal&lt;br/&gt;
memfree&lt;br/&gt;
buffers&lt;br/&gt;
cached&lt;br/&gt;
swapcached&lt;br/&gt;
active&lt;br/&gt;
inactive&lt;br/&gt;
active anon&lt;br/&gt;
inactive anon&lt;br/&gt;
active file&lt;br/&gt;
inactive file&lt;br/&gt;
dirty&lt;/p&gt;

&lt;p&gt;&lt;b&gt;/sys/block/&amp;#42;/stat&lt;/b&gt;&lt;br/&gt;
sd*.reads&lt;br/&gt;
sd*.reads_merged&lt;br/&gt;
sd*.read_sectors&lt;br/&gt;
sd*.read_time_ms&lt;br/&gt;
sd*.writes&lt;br/&gt;
sd*.writes_merged&lt;br/&gt;
sd*.write_sectors&lt;br/&gt;
sd*.write_time_ms&lt;br/&gt;
sd*.io_in_progress&lt;br/&gt;
sd*.io_time_ms&lt;br/&gt;
sd*.io_queued_ms&lt;/p&gt;

&lt;p&gt;Similar metrics are available through Windows APIs. Where applicable cumulative counters are preferred over instantaneous values because cumulative counters can be sampled at arbitrary time intervals. In general raw system-specific metrics with a minimum of processing are preferred, leaving it to tooling to subsample as needed and compute useful values for display. (An exception might be for example that sectors could be converted to bytes because sector may be a system- or device-specific unit.)&lt;/p&gt;
</description>
                <environment></environment>
        <key id="336320">DOCS-9502</key>
            <summary>Docs for SERVER-21818: Capture system metrics in FTDC</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="emily.hall">Emily Hall</reporter>
                        <labels>
                            <label>monitoring</label>
                    </labels>
                <created>Mon, 5 Dec 2016 13:23:22 +0000</created>
                <updated>Mon, 30 Oct 2023 21:20:14 +0000</updated>
                                                            <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4940844" author="edu.bot" created="Mon, 31 Oct 2022 16:11:52 +0000"  >&lt;p&gt;Hello! This ticket has been closed due to inactivity. If you believe this ticket is still important, please reopen it and leave a comment to explain why. Thank you!&lt;/p&gt;</comment>
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