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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-36675] maintenance in mongos workload</title>
                <link>https://jira.mongodb.org/browse/SERVER-36675</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;What happens when we bounce / bring on a new mongos&lt;/p&gt;

&lt;p&gt;Test:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Set up a 1 shard cluster&lt;/li&gt;
	&lt;li&gt;Set up a workload of N sleeps per second via a mongos
	&lt;ul&gt;
		&lt;li&gt;Stage these out so that the workload practically requires M connections to execute (due to the sleeps)&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;Measure steady state perf&lt;/li&gt;
	&lt;li&gt;Try stuff:
	&lt;ul&gt;
		&lt;li&gt;Set up a second mongos
		&lt;ul&gt;
			&lt;li&gt;Point an equivalent workload against it&lt;/li&gt;
		&lt;/ul&gt;
		&lt;/li&gt;
		&lt;li&gt;Bounce the mongos
		&lt;ul&gt;
			&lt;li&gt;Time to reversion to mean&lt;/li&gt;
		&lt;/ul&gt;
		&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;Variants:
	&lt;ul&gt;
		&lt;li&gt;Is it worse if there is a very large routing table
		&lt;ul&gt;
			&lt;li&gt;Many shards&lt;/li&gt;
			&lt;li&gt;Many chunks&lt;/li&gt;
		&lt;/ul&gt;
		&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="588577">SERVER-36675</key>
            <summary>maintenance in mongos workload</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="mira.carey@mongodb.com">Mira Carey</reporter>
                        <labels>
                            <label>PM-1211</label>
                            <label>re-triaged-ticket</label>
                    </labels>
                <created>Tue, 14 Aug 2018 23:04:31 +0000</created>
                <updated>Thu, 23 Mar 2023 20:30:18 +0000</updated>
                            <resolved>Tue, 2 Nov 2021 15:11:55 +0000</resolved>
                                                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4163358" author="JIRAUSER1262719" created="Tue, 2 Nov 2021 15:11:56 +0000"  >&lt;p&gt;The Service Arch team is in the process of cleaning up tickets in the backlog. This ticket has not been updated in two years so we are closing it. Please reopen if you think this change is valuable.&lt;/p&gt;</comment>
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