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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>
    </build-info>


<item>
            <title>[SERVER-47428] Move concurrency_sharded* Evergreen tasks to -large distros</title>
                <link>https://jira.mongodb.org/browse/SERVER-47428</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;concurrency&amp;#95;sharded&amp;#42;.yml&lt;/tt&gt; test suites run against a 2-shard, 3-node replica set shard cluster (sometimes with a 1-node CSRS and sometimes with a 3-node CSRS) with 2 mongos processes. &lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_v4.4_enterprise_rhel_62_64_bit_concurrency_sharded_replication_with_balancer_aaa0011c67807d5e70f3f06a434f115438295cdb_20_04_01_23_06_45/0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;They currently&lt;/a&gt; run on the -small distros, which typically correspond to c4.xlarge and have 7.5GB of memory. The 6+ mongod processes tend not to leave much headroom for the other MongoDB processes, resmoke.py buffering log messages, or gdb attaching to a process. We have recently been seeing the OOM killer killing processes on the machine and causing the Evergreen task to fail. Moving to the -large distros, which typically correspond to c4.4xlarge and have 30GB of memory, should address these failures. This involves doing the following:&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;Adding &lt;a href=&quot;https://github.com/mongodb/mongo/blob/aa30f3747a32237e5dbb187c5bedd19108ad2f4e/etc/evergreen.yml#L6707&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the &quot;large&quot; Evergreen task tag&lt;/a&gt; to all of the &lt;tt&gt;concurrency&amp;#95;sharded&amp;#42;&lt;/tt&gt; task definitions.&lt;/li&gt;
	&lt;li&gt;Explicitly specifying the &lt;tt&gt;distros&lt;/tt&gt; option to the &lt;tt&gt;concurrency&amp;#95;sharded&amp;#42;&lt;/tt&gt; tasks listed on the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/aa30f3747a32237e5dbb187c5bedd19108ad2f4e/etc/evergreen.yml#L10134-L10143&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Enterprise RHEL 6.2 (large transactions format)&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/aa30f3747a32237e5dbb187c5bedd19108ad2f4e/etc/evergreen.yml#L10214&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Enterprise RHEL 6.2 (majority read concern off)&lt;/a&gt; build variants. Note that the &lt;tt&gt;concurrency_sharded_causal_consistency_gen&lt;/tt&gt; task specifies &lt;tt&gt;use_large_distro: &quot;true&quot;&lt;/tt&gt; already and can be left alone.&lt;/li&gt;
&lt;/ol&gt;
</description>
                <environment></environment>
        <key id="1309023">SERVER-47428</key>
            <summary>Move concurrency_sharded* Evergreen tasks to -large distros</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="max.hirschhorn@mongodb.com">Max Hirschhorn</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                            <label>sharding-4.4-stabilization</label>
                    </labels>
                <created>Thu, 9 Apr 2020 00:35:39 +0000</created>
                <updated>Sun, 29 Oct 2023 22:09:45 +0000</updated>
                            <resolved>Wed, 15 Apr 2020 01:19:52 +0000</resolved>
                                                    <fixVersion>4.4.0-rc2</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                    <fixVersion>4.2.10</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3331528" author="xgen-internal-githook" created="Mon, 10 Aug 2020 20:37:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Max Hirschhorn&apos;, &apos;email&apos;: &apos;max.hirschhorn@mongodb.com&apos;, &apos;username&apos;: &apos;visemet&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47428&quot; title=&quot;Move concurrency_sharded* Evergreen tasks to -large distros&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47428&quot;&gt;&lt;del&gt;SERVER-47428&lt;/del&gt;&lt;/a&gt; Move concurrency_sharded* tasks to -large distros.&lt;/p&gt;

&lt;p&gt;Not all build variants run the concurrency* tasks with the &quot;large&quot; task&lt;br/&gt;
tag on a -large distro. The RHEL 6.2 and SUSE 12 build variants were&lt;br/&gt;
specifically modified to do so because OOM failures have been observed&lt;br/&gt;
on them.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 6202c52a254ced5238eaf7f77117f7c4865aed56)&lt;br/&gt;
(cherry picked from commit 6c5be09f0f56e390ee0eb652b6c723fb3e484d7f)&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d4e970c26ded41593ea5c008526f7c2ff1d56d5a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d4e970c26ded41593ea5c008526f7c2ff1d56d5a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3040054" author="xgen-internal-githook" created="Wed, 15 Apr 2020 02:39:47 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Max Hirschhorn&apos;, &apos;email&apos;: &apos;max.hirschhorn@mongodb.com&apos;, &apos;username&apos;: &apos;visemet&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47428&quot; title=&quot;Move concurrency_sharded* Evergreen tasks to -large distros&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47428&quot;&gt;&lt;del&gt;SERVER-47428&lt;/del&gt;&lt;/a&gt; Move concurrency_sharded* tasks to -large distros.&lt;/p&gt;

&lt;p&gt;Not all build variants run the concurrency* tasks with the &quot;large&quot; task&lt;br/&gt;
tag on a -large distro. The RHEL 6.2 and SUSE 12 build variants were&lt;br/&gt;
specifically modified to do so because OOM failures have been observed&lt;br/&gt;
on them.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 6202c52a254ced5238eaf7f77117f7c4865aed56)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6c5be09f0f56e390ee0eb652b6c723fb3e484d7f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6c5be09f0f56e390ee0eb652b6c723fb3e484d7f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3039975" author="xgen-internal-githook" created="Wed, 15 Apr 2020 00:37:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Max Hirschhorn&apos;, &apos;email&apos;: &apos;max.hirschhorn@mongodb.com&apos;, &apos;username&apos;: &apos;visemet&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47428&quot; title=&quot;Move concurrency_sharded* Evergreen tasks to -large distros&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47428&quot;&gt;&lt;del&gt;SERVER-47428&lt;/del&gt;&lt;/a&gt; Move concurrency_sharded* tasks to -large distros.&lt;/p&gt;

&lt;p&gt;Not all build variants run the concurrency* tasks with the &quot;large&quot; task&lt;br/&gt;
tag on a -large distro. The RHEL 6.2 and SUSE 12 build variants were&lt;br/&gt;
specifically modified to do so because OOM failures have been observed&lt;br/&gt;
on them.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6202c52a254ced5238eaf7f77117f7c4865aed56&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6202c52a254ced5238eaf7f77117f7c4865aed56&lt;/a&gt;&lt;/p&gt;</comment>
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