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    <title>MongoDB Jira</title>
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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-42402] Performance benchmark for refining the shard key of a collection with very many chunks</title>
                <link>https://jira.mongodb.org/browse/SERVER-42402</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;From &lt;a href=&quot;https://docs.google.com/document/d/1X91kPudrOog7sQsrxB7GXTiRe66B4yUSx4rLj5HKvfY/edit#heading=h.5iu1y848bbb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the design document&lt;/a&gt;:&#160;&lt;/p&gt;

&lt;p&gt;A sysperf benchmark should be made that actually refines the shard key for a collection with a huge number of chunks to uncover any unforeseen performance problems. This benchmark will serve mostly as a sanity check and should only be added as a permanent benchmark if it is found to add valuable enough performance coverage beyond the coverage from the benchmark in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42400&quot; title=&quot;Add new task in system_perf.yml for million documents in transaction workload&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42400&quot;&gt;&lt;del&gt;SERVER-42400&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="874690">SERVER-42402</key>
            <summary>Performance benchmark for refining the shard key of a collection with very many chunks</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="9">Done</resolution>
                                        <assignee username="blake.oler@mongodb.com">Blake Oler</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                    </labels>
                <created>Wed, 24 Jul 2019 21:03:06 +0000</created>
                <updated>Mon, 11 Nov 2019 18:09:50 +0000</updated>
                            <resolved>Mon, 11 Nov 2019 18:09:50 +0000</resolved>
                                                                    <component>Performance</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2528939" author="blake.oler" created="Mon, 11 Nov 2019 18:08:24 +0000"  >&lt;p&gt;Verified via local testing that the time taken for refining a shard key is linear with the amount of chunks. Chart is in the attached file. Closing this ticket as Done.&lt;/p&gt;
</comment>
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                    <name>Gantt Dependency</name>
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                            <attachment id="236920" name="Screenshot from 2019-11-08 13-27-42.png" size="25167" author="blake.oler@mongodb.com" created="Mon, 11 Nov 2019 18:08:19 +0000"/>
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