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    <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-65294] Speed up replset tenant_migration_* tests</title>
                <link>https://jira.mongodb.org/browse/SERVER-65294</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There are multiple tenant_migration_*.js tests under the replica sets suite take 10+ minutes. As these tests run a tenant migration hundreds of times surrounding individual user commands, any savings on how long it takes to run a tenant migration can add up.&lt;/p&gt;

&lt;p&gt;One observed deficiency is that each tenant migration takes a minimum of 5 seconds to run. There&apos;s a problem where majority read concern tailable awaitdata cursors don&apos;t return when their first document is ready, but rather when the &lt;tt&gt;maxTimeMs&lt;/tt&gt; is satisfied (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/b455f601072c1c3a75bbdefb252cf2642822a0a6/src/mongo/db/repl/oplog_fetcher.cpp#L111-L120&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;default 5 seconds based on the election timeout&lt;/a&gt;). Addressing that unnecessary cost alone saves ~10 minutes on every run of &lt;tt&gt;tenant_migration_concurrent_writes_on_donor.js&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;This ticket should also audit other codepaths to make sure tests are running as expected.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2018227">SERVER-65294</key>
            <summary>Speed up replset tenant_migration_* tests</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="3">Duplicate</resolution>
                                        <assignee username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</assignee>
                                    <reporter username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</reporter>
                        <labels>
                    </labels>
                <created>Wed, 6 Apr 2022 15:11:28 +0000</created>
                <updated>Wed, 4 May 2022 19:54:28 +0000</updated>
                            <resolved>Wed, 4 May 2022 19:54:28 +0000</resolved>
                                                                                        <votes>0</votes>
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