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    <title>MongoDB Jira</title>
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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-50518] Improve slim_oplog_test.js to assert query performance</title>
                <link>https://jira.mongodb.org/browse/SERVER-50518</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49890&quot; title=&quot;Create local.system.resharding.slimOplogForGraphLookup view on donor shards&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49890&quot;&gt;&lt;del&gt;SERVER-49890&lt;/del&gt;&lt;/a&gt; hoped to verify that pipelining the oplog into a graphLookup on the &lt;tt&gt;local.system.resharding.slimOplogForGraphLookup&lt;/tt&gt; view used the oplog hack for efficient lookup. However, the (amateur) observation is that while the code is performant as expected, &lt;tt&gt;$graphLookup&lt;/tt&gt; does not integrate with &lt;tt&gt;explain&lt;/tt&gt;. The work done by &lt;tt&gt;$graphLookup&lt;/tt&gt; is allegedly completely unreported.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1451589">SERVER-50518</key>
            <summary>Improve slim_oplog_test.js to assert query performance</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="13203">Gone away</resolution>
                                        <assignee username="backlog-server-sharding-nyc">[DO NOT USE] Backlog - Sharding NYC</assignee>
                                    <reporter username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</reporter>
                        <labels>
                    </labels>
                <created>Tue, 25 Aug 2020 14:05:16 +0000</created>
                <updated>Fri, 27 Oct 2023 20:46:27 +0000</updated>
                            <resolved>Sat, 5 Jun 2021 19:15:31 +0000</resolved>
                                                                    <component>Querying</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3861350" author="max.hirschhorn@10gen.com" created="Sat, 5 Jun 2021 19:15:31 +0000"  >&lt;p&gt;The local.system.resharding.slimOplogForGraphLookup view is no longer used by resharding (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57303&quot; title=&quot;Create transaction history iterator stage for Resharding&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57303&quot;&gt;&lt;del&gt;SERVER-57303&lt;/del&gt;&lt;/a&gt;). slim&amp;#95;oplog&amp;#95;test.js shall be removed by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57478&quot; title=&quot;Remove code related to local.system.resharding.slimOplogForGraphLookup view&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57478&quot;&gt;&lt;del&gt;SERVER-57478&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="3360856" author="max.hirschhorn@10gen.com" created="Wed, 26 Aug 2020 19:06:34 +0000"  >&lt;p&gt;One thought would be to write a genny workload which runs a $graphLookup pipeline on a view on the oplog. I&apos;d vote to only run it on the 1-Node ReplSet Linux inMemory build variant in &lt;a href=&quot;https://evergreen.mongodb.com/waterfall/performance&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the /performance Evergreen project&lt;/a&gt; and not run it at all in sys-perf.&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is related to">
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            <issuekey id="1421049">SERVER-49890</issuekey>
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            <issuekey id="1769847">SERVER-57478</issuekey>
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            <issuelink>
            <issuekey id="572997">SERVER-36186</issuekey>
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