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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>[SERVER-29148] Increase run time for mongos tests in sys-perf</title>
                <link>https://jira.mongodb.org/browse/SERVER-29148</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It seems that mongos sys-perf tests are running a bit longer recently, and including the validate part, the mmapv1 task is at risk at hitting the 6 hour limit.&lt;/p&gt;

&lt;p&gt;We should increase the exec_timeout_secs to 8 hours for that task. While doing that, please double check superficially that there isn&apos;t anything wrong why the task takes longer. (The assumption is that addition of fio and changing to EBS has made total runtime slower, even if the test results don&apos;t seem to have regressed.)&lt;/p&gt;</description>
                <environment></environment>
        <key id="382777">SERVER-29148</key>
            <summary>Increase run time for mongos tests in sys-perf</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="13201">Fixed</resolution>
                                        <assignee username="henrik.ingo@mongodb.com">Henrik Ingo</assignee>
                                    <reporter username="henrik.ingo@mongodb.com">Henrik Ingo</reporter>
                        <labels>
                    </labels>
                <created>Thu, 11 May 2017 17:01:57 +0000</created>
                <updated>Mon, 30 Oct 2023 23:16:55 +0000</updated>
                            <resolved>Mon, 29 May 2017 15:59:24 +0000</resolved>
                                                    <fixVersion>3.2.15</fixVersion>
                    <fixVersion>3.4.6</fixVersion>
                    <fixVersion>3.5.8</fixVersion>
                                    <component>Performance</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1601674" author="xgen-internal-githook" created="Tue, 20 Jun 2017 13:31:40 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;henrikingo&apos;, u&apos;name&apos;: u&apos;Henrik Ingo&apos;, u&apos;email&apos;: u&apos;henrik.ingo@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29148&quot; title=&quot;Increase run time for mongos tests in sys-perf&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29148&quot;&gt;&lt;del&gt;SERVER-29148&lt;/del&gt;&lt;/a&gt; Increase exec_timeout_secs for sys-perf mongos_workloads_MMAPv1 to 9&lt;/p&gt;

&lt;p&gt;...hours to leave some additional headroom&lt;/p&gt;

&lt;p&gt;(cherry picked from commit f7dce408e025a4d7d807aeab9f4fa7cbe9bf5953)&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/386d82060df58537bbdcb223f0ef54f97e7630ab&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/386d82060df58537bbdcb223f0ef54f97e7630ab&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1601673" author="xgen-internal-githook" created="Tue, 20 Jun 2017 13:31:39 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;henrikingo&apos;, u&apos;name&apos;: u&apos;Henrik Ingo&apos;, u&apos;email&apos;: u&apos;henrik.ingo@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29148&quot; title=&quot;Increase run time for mongos tests in sys-perf&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29148&quot;&gt;&lt;del&gt;SERVER-29148&lt;/del&gt;&lt;/a&gt; Increase run time for mongos tests in sys-perf&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 0ecf1da443f2cdc276e852217fbea8d4eb1c9df1)&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/71d78971263ed816a37658186bb2e460166f5603&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/71d78971263ed816a37658186bb2e460166f5603&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1601670" author="xgen-internal-githook" created="Tue, 20 Jun 2017 13:29:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;henrikingo&apos;, u&apos;name&apos;: u&apos;Henrik Ingo&apos;, u&apos;email&apos;: u&apos;henrik.ingo@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29148&quot; title=&quot;Increase run time for mongos tests in sys-perf&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29148&quot;&gt;&lt;del&gt;SERVER-29148&lt;/del&gt;&lt;/a&gt; Increase exec_timeout_secs for sys-perf mongos_workloads_MMAPv1 to 9&lt;/p&gt;

&lt;p&gt;...hours to leave some additional headroom&lt;/p&gt;

&lt;p&gt;(cherry picked from commit f7dce408e025a4d7d807aeab9f4fa7cbe9bf5953)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/49a1983cd0f262dd9ded1b452014c91c9a623bc4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/49a1983cd0f262dd9ded1b452014c91c9a623bc4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1601669" author="xgen-internal-githook" created="Tue, 20 Jun 2017 13:29:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;henrikingo&apos;, u&apos;name&apos;: u&apos;Henrik Ingo&apos;, u&apos;email&apos;: u&apos;henrik.ingo@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29148&quot; title=&quot;Increase run time for mongos tests in sys-perf&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29148&quot;&gt;&lt;del&gt;SERVER-29148&lt;/del&gt;&lt;/a&gt; Increase run time for mongos tests in sys-perf&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 0ecf1da443f2cdc276e852217fbea8d4eb1c9df1)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2e764884421c5e8e687bb37f0130839c3ed08fec&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2e764884421c5e8e687bb37f0130839c3ed08fec&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1582112" author="xgen-internal-githook" created="Mon, 29 May 2017 15:52:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;henrikingo&apos;, u&apos;name&apos;: u&apos;Henrik Ingo&apos;, u&apos;email&apos;: u&apos;henrik.ingo@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29148&quot; title=&quot;Increase run time for mongos tests in sys-perf&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29148&quot;&gt;&lt;del&gt;SERVER-29148&lt;/del&gt;&lt;/a&gt; Increase exec_timeout_secs for sys-perf mongos_workloads_MMAPv1 to 9&lt;/p&gt;

&lt;p&gt;...hours to leave some additional headroom&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f7dce408e025a4d7d807aeab9f4fa7cbe9bf5953&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f7dce408e025a4d7d807aeab9f4fa7cbe9bf5953&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1580663" author="henrik.ingo@10gen.com" created="Fri, 26 May 2017 07:58:30 +0000"  >&lt;p&gt;Task now works, but run time was 7h45m. Re-opening this ticket to set time to 9 h instead.&lt;/p&gt;</comment>
                            <comment id="1578797" author="xgen-internal-githook" created="Wed, 24 May 2017 13:30:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;henrikingo&apos;, u&apos;name&apos;: u&apos;Henrik Ingo&apos;, u&apos;email&apos;: u&apos;henrik.ingo@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29148&quot; title=&quot;Increase run time for mongos tests in sys-perf&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29148&quot;&gt;&lt;del&gt;SERVER-29148&lt;/del&gt;&lt;/a&gt; Increase run time for mongos tests in sys-perf&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0ecf1da443f2cdc276e852217fbea8d4eb1c9df1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0ecf1da443f2cdc276e852217fbea8d4eb1c9df1&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1578693" author="henrik.ingo@10gen.com" created="Wed, 24 May 2017 10:42:28 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kaloian.manassiev&quot; class=&quot;user-hover&quot; rel=&quot;kaloian.manassiev&quot;&gt;kaloian.manassiev&lt;/a&gt;, others&lt;/p&gt;

&lt;p&gt;It looks like the post-test validate_collections.js (and siblings in jstests/hooks) used to run in about 15 minutes, and after changing to readahead=32, it takes 30-40 minutes. It is run several times in the task, so combined this explains the increased run time.&lt;/p&gt;</comment>
                            <comment id="1570949" author="henrik.ingo@10gen.com" created="Mon, 15 May 2017 08:52:19 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kaloian.manassiev&quot; class=&quot;user-hover&quot; rel=&quot;kaloian.manassiev&quot;&gt;kaloian.manassiev&lt;/a&gt; We will have to double check exactly that question when we actively work on this ticket, however based on a first glance the test results themselves haven&apos;t changed much. The increased run-time can come from activities outside the actual tests, most of which are also single threaded, so particularly sensitive:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;inserts to populate a collection with data before a test&lt;/li&gt;
	&lt;li&gt;post-test checks in jstests/hooks (e.g. run_check_repl_dbhash.js)&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;If the increased run-time is due to issues like this, then the most likely reason is our recent migration to EBS instead of SSD, which increased latency of disk access. (But also made the latency more stable, which is what we like.)&lt;/p&gt;</comment>
                            <comment id="1570425" author="kaloian.manassiev" created="Sat, 13 May 2017 14:02:12 +0000"  >&lt;p&gt;Is this an indication of performance degradation? Is there a specific commit after which they have started running slower that you know of?&lt;/p&gt;</comment>
                    </comments>
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