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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-50290] Enforce stronger limits on task splitting</title>
                <link>https://jira.mongodb.org/browse/SERVER-50290</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We have found that splitting tasks too aggressively we can create a lot of extra work in setup and teardown of the tests, which causes us to split tasks even more, which leads to more setup and teardown. By limiting the number of sub-tasks we create, we can contain the growth of the setup/teardown overhead. &lt;/p&gt;

&lt;p&gt;In some exploration, it appears that a max split of 3 gives us similar makespans as we currently have, which minimizing the overhead of additional tasks.&lt;/p&gt;

&lt;hr /&gt;

&lt;p&gt;As a server engineer, &lt;br/&gt;
I want tasks in my patch builds split optimally,&lt;br/&gt;
So that I can minimize the amount of time I spend waiting for a patch build.&lt;/p&gt;

&lt;hr /&gt;

&lt;p&gt;AC:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;All required builders set the max_sub_suites value to 3.&lt;/li&gt;
	&lt;li&gt;Non-required builders set the max_sub_suites value to 1.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="1440931">SERVER-50290</key>
            <summary>Enforce stronger limits on task splitting</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="david.bradford@mongodb.com">David Bradford</assignee>
                                    <reporter username="david.bradford@mongodb.com">David Bradford</reporter>
                        <labels>
                    </labels>
                <created>Thu, 13 Aug 2020 13:57:42 +0000</created>
                <updated>Sun, 29 Oct 2023 22:04:28 +0000</updated>
                            <resolved>Thu, 13 Aug 2020 20:24:32 +0000</resolved>
                                                    <fixVersion>4.4.1</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3347010" author="harris.hoke" created="Wed, 19 Aug 2020 13:56:21 +0000"  >&lt;p&gt;Just for the last 24 hours, we didn&#8217;t even hit max_hosts on either rhel62 distro, much less maxing out for those long nightly plateaus we&#8217;ve come to expect. With one day of this I would be worried it was just a fluke due to fluctuations in volume, but two days is extremely promising to me!&lt;br/&gt;
 &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;274638_thumb&quot; href=&quot;https://jira.mongodb.org/secure/attachment/274638/274638_Screen+Shot+2020-08-19+at+9.32.11+AM.png&quot; title=&quot;Screen Shot 2020-08-19 at 9.32.11 AM.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;274638&quot; file-preview-title=&quot;Screen Shot 2020-08-19 at 9.32.11 AM.png&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/thumbnail/274638/_thumb_274638.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</comment>
                            <comment id="3338311" author="xgen-internal-githook" created="Thu, 13 Aug 2020 20:17:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;David Bradford&apos;, &apos;email&apos;: &apos;david.bradford@mongodb.com&apos;, &apos;username&apos;: &apos;dbradf&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50290&quot; title=&quot;Enforce stronger limits on task splitting&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50290&quot;&gt;&lt;del&gt;SERVER-50290&lt;/del&gt;&lt;/a&gt;: Cap number of subtasks generated&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 53b690294d160a6e1cd0f4a004cb55c4835a48b8)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7ef0e225846a25821325bd24fc66d29f4c503385&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7ef0e225846a25821325bd24fc66d29f4c503385&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3338088" author="xgen-internal-githook" created="Thu, 13 Aug 2020 18:42:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;David Bradford&apos;, &apos;email&apos;: &apos;david.bradford@mongodb.com&apos;, &apos;username&apos;: &apos;dbradf&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50290&quot; title=&quot;Enforce stronger limits on task splitting&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50290&quot;&gt;&lt;del&gt;SERVER-50290&lt;/del&gt;&lt;/a&gt;: Cap number of subtasks generated&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/53b690294d160a6e1cd0f4a004cb55c4835a48b8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/53b690294d160a6e1cd0f4a004cb55c4835a48b8&lt;/a&gt;&lt;/p&gt;</comment>
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                            <attachment id="274638" name="Screen Shot 2020-08-19 at 9.32.11 AM.png" size="42576" author="harris.hoke@mongodb.com" created="Wed, 19 Aug 2020 13:56:03 +0000"/>
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