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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-81103] disable mirroredReads in plan_cache_stats_all_hosts_sharded</title>
                <link>https://jira.mongodb.org/browse/SERVER-81103</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Starting in 4.4, mirrored reads are enabled by default with a sampling rate of 0.10. If not disabled, the primary node mirrors supported reads (this includes find queries) to the secondary node&apos;s cache to &quot;warm it up&quot; to reduce performance impact of primary elections. Here the cache means &quot;everything on RAM&quot;, which includes the plan cache. Thus even though the primary node executes a find query, the secondary&apos;s cache will &quot;mirror&quot; this read and have a plan for it in its plan cache. This results in the secondary having more plans in the cache than it executed. We disable this mirroring so the test passes in burn_in_tests.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2443376">SERVER-81103</key>
            <summary>disable mirroredReads in plan_cache_stats_all_hosts_sharded</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="maddie.zechar@mongodb.com">Maddie Zechar</assignee>
                                    <reporter username="maddie.zechar@mongodb.com">Maddie Zechar</reporter>
                        <labels>
                    </labels>
                <created>Fri, 15 Sep 2023 15:24:32 +0000</created>
                <updated>Sun, 29 Oct 2023 21:16:19 +0000</updated>
                            <resolved>Fri, 15 Sep 2023 21:05:58 +0000</resolved>
                                                    <fixVersion>7.1.0-rc4</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5722699" author="xgen-internal-githook" created="Thu, 21 Sep 2023 21:16:19 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;madelinezec&apos;, &apos;email&apos;: &apos;mez2113@columbia.edu&apos;, &apos;username&apos;: &apos;madelinezec&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-81103&quot; title=&quot;disable mirroredReads in plan_cache_stats_all_hosts_sharded&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-81103&quot;&gt;&lt;del&gt;SERVER-81103&lt;/del&gt;&lt;/a&gt; disable mirroredReads in plan_cache_stats_all_hosts_sharded&lt;br/&gt;
Branch: v7.1&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/dc03829c2ff899c9f36a6f03dd45ebbce2671020&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/dc03829c2ff899c9f36a6f03dd45ebbce2671020&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5719588" author="JIRAUSER1274113" created="Wed, 20 Sep 2023 21:35:07 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=maddie.zechar%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;maddie.zechar@mongodb.com&quot;&gt;maddie.zechar@mongodb.com&lt;/a&gt;, there is a request for 7.1 backport, please, note that v7.1 is frozen. Reach out to &lt;a href=&quot;https://mongodb.slack.com/admin/user_groups&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;@server-release-managers&lt;/a&gt;&#160;in&#160;&lt;a href=&quot;https://mongodb.slack.com/archives/C1XQ502TA&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;#server-release&lt;/a&gt; channel to merge the backport to 7.1&lt;/p&gt;</comment>
                            <comment id="5716976" author="JIRAUSER1259769" created="Wed, 20 Sep 2023 07:18:52 +0000"  >&lt;p&gt;Requesting backport as the issue continues to happen on v7.1 (please, see &lt;a href=&quot;https://buildbaron.corp.mongodb.com/ui/#/bfg/BFG-2094095&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;BFG-2094095&lt;/a&gt;)&lt;/p&gt;</comment>
                            <comment id="5708511" author="xgen-internal-githook" created="Fri, 15 Sep 2023 20:18:47 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;madelinezec&apos;, &apos;email&apos;: &apos;mez2113@columbia.edu&apos;, &apos;username&apos;: &apos;madelinezec&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-81103&quot; title=&quot;disable mirroredReads in plan_cache_stats_all_hosts_sharded&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-81103&quot;&gt;&lt;del&gt;SERVER-81103&lt;/del&gt;&lt;/a&gt; disable mirroredReads in plan_cache_stats_all_hosts_sharded&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/627895b8474ae137acffff5d5352ed1318d438b7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/627895b8474ae137acffff5d5352ed1318d438b7&lt;/a&gt;&lt;/p&gt;</comment>
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