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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-41923] Provide a way for a secondary to warm up the cache automatically by matching the cached data on the primary</title>
                <link>https://jira.mongodb.org/browse/SERVER-41923</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Right now if a replica set (shard) member is restarted it brings a performance impact since the members has to load data into the cache from the disk before the performance returns to the normal level.&lt;/p&gt;

&lt;p&gt;The only workaround for that so far is by synthesizing a custom workload that would warm up the cache for the users ad-hoc. This presents the problem as it would require certain development effort and, for instance, in Atlas the failovers (restarts) are pretty frequent phenomenon due to the maintenance activities.&lt;/p&gt;

&lt;p&gt;It would be great if the secondary could get the map of the cached data from another member (say, primary) and use it to warm up its own cache.&lt;/p&gt;</description>
                <environment></environment>
        <key id="814881">SERVER-41923</key>
            <summary>Provide a way for a secondary to warm up the cache automatically by matching the cached data on the primary</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="13203">Gone away</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="dmitry.ryabtsev@mongodb.com">Dmitry Ryabtsev</reporter>
                        <labels>
                    </labels>
                <created>Wed, 26 Jun 2019 04:23:38 +0000</created>
                <updated>Fri, 27 Oct 2023 20:42:49 +0000</updated>
                            <resolved>Mon, 10 Jan 2022 14:07:21 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>1</votes>
                                    <watches>17</watches>
                                                                                                                <comments>
                            <comment id="4283083" author="thomas.schubert" created="Mon, 10 Jan 2022 14:55:55 +0000"  >&lt;p&gt;This feature was tracked over a number of tickets and is available starting in MongoDB 4.4.0. For more details, see &lt;a href=&quot;https://docs.mongodb.com/manual/release-notes/4.4/#mirrored-reads&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/release-notes/4.4/#mirrored-reads&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2321939" author="siyuan.zhou@10gen.com" created="Thu, 11 Jul 2019 21:00:27 +0000"  >&lt;p&gt;Reopened the ticket as the proposal of&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3767&quot; title=&quot;Keep Indexes in Memory on Secondary Nodes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3767&quot;&gt;&lt;del&gt;SERVER-3767&lt;/del&gt;&lt;/a&gt; is slightly different from this one.&lt;/p&gt;</comment>
                            <comment id="2321898" author="siyuan.zhou@10gen.com" created="Thu, 11 Jul 2019 20:42:56 +0000"  >&lt;p&gt;Closing this ticket as a dup of&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3767&quot; title=&quot;Keep Indexes in Memory on Secondary Nodes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3767&quot;&gt;&lt;del&gt;SERVER-3767&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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