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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-29353] Increase the amount of memory available for tests running on the UBSan builder</title>
                <link>https://jira.mongodb.org/browse/SERVER-29353</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There have been many instances where the OOM killer has killed a mongod process when running on the UBSan builder. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.5.7/etc/evergreen.yml#L8612&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;With the &lt;tt&gt;num_jobs_available&lt;/tt&gt; expansion equal to the number of CPUs&lt;/a&gt;, we end up running 4 tests concurrently on the &lt;tt&gt;ubuntu1604&amp;#45;test&lt;/tt&gt; distro is a c3.xlarge (4 CPU, 7.5GiB memory). We should change to use the &lt;tt&gt;ubuntu1604&amp;#45;build&lt;/tt&gt; distro and set &lt;tt&gt;num_jobs_available&lt;/tt&gt; to number of CPUs divided by 3 when running tests &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.5.7/etc/evergreen.yml#L8436&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;to match the configuration we use for the ASan builders&lt;/a&gt;. The &lt;tt&gt;ubuntu1604&amp;#45;build&lt;/tt&gt; distro is a c3.4xlarge (16 CPU, 30GiB memory), so we&apos;ll end up running 5 tests concurrently, but have a larger ratio (3.2x) of available memory to number of concurrent tests.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Note&lt;/b&gt;: The special handling for running the &quot;compile&quot; task on the &lt;tt&gt;ubuntu1604&amp;#45;build&lt;/tt&gt; distro can be removed since all tasks for the build variant will run on that distro anyway.&lt;/p&gt;

&lt;hr /&gt;

&lt;p&gt;&lt;a href=&quot;https://aws.amazon.com/ec2/instance-types/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://aws.amazon.com/ec2/instance-types/&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="386560">SERVER-29353</key>
            <summary>Increase the amount of memory available for tests running on the UBSan builder</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="eddie.louie">Eddie Louie</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                            <label>tig-evgconfig</label>
                    </labels>
                <created>Wed, 24 May 2017 17:42:29 +0000</created>
                <updated>Mon, 30 Oct 2023 23:16:34 +0000</updated>
                            <resolved>Wed, 31 May 2017 14:02:43 +0000</resolved>
                                                    <fixVersion>3.4.5</fixVersion>
                    <fixVersion>3.5.9</fixVersion>
                                    <component>Build</component>
                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1586183" author="xgen-internal-githook" created="Fri, 2 Jun 2017 17:37:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;elouie99&apos;, u&apos;name&apos;: u&apos;Eddie Louie&apos;, u&apos;email&apos;: u&apos;eddie.louie@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29353&quot; title=&quot;Increase the amount of memory available for tests running on the UBSan builder&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29353&quot;&gt;&lt;del&gt;SERVER-29353&lt;/del&gt;&lt;/a&gt; Increase amount of memory available for tests running on UBSan builder&lt;/p&gt;

&lt;p&gt;(cherry picked from commit ede32e355cc476a7f672a353efdfda66b1273a1f)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/537dbec568f58368fc7f2b7a3e249fd166a24aff&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/537dbec568f58368fc7f2b7a3e249fd166a24aff&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1583736" author="xgen-internal-githook" created="Wed, 31 May 2017 13:56:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;elouie99&apos;, u&apos;name&apos;: u&apos;Eddie Louie&apos;, u&apos;email&apos;: u&apos;eddie.louie@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29353&quot; title=&quot;Increase the amount of memory available for tests running on the UBSan builder&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29353&quot;&gt;&lt;del&gt;SERVER-29353&lt;/del&gt;&lt;/a&gt; Increase amount of memory available for tests running on UBSan builder&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ede32e355cc476a7f672a353efdfda66b1273a1f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ede32e355cc476a7f672a353efdfda66b1273a1f&lt;/a&gt;&lt;/p&gt;</comment>
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