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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-34436] Workloads to apply transaction snapshot cache pressure</title>
                <link>https://jira.mongodb.org/browse/SERVER-34436</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;From the design:&lt;/p&gt;

&lt;p&gt;&quot;Test a varying workload that first applies cache pressure (many write transactions with one outstanding incomplete read transaction), then floods a server with PIT requests, then applies cache pressure again.&quot;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31767&quot; title=&quot;Provide a window of snapshot history that is accessible for PIT reads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31767&quot;&gt;&lt;del&gt;SERVER-31767&lt;/del&gt;&lt;/a&gt; is introducing a snapshot history window within which a mongod guarantees service of reads, along with a few new server parameter knobs to handle cache pressure. Cache pressure can build as we keep too many snapshots open and the cache and server become immobilized, so we must test out configurations.&lt;/p&gt;

&lt;p&gt;PIT requests are currently using the stable_timestamp, so this ticket may depend on further progress of the global PIT reads project, which depends on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31767&quot; title=&quot;Provide a window of snapshot history that is accessible for PIT reads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31767&quot;&gt;&lt;del&gt;SERVER-31767&lt;/del&gt;&lt;/a&gt;. &lt;/p&gt;</description>
                <environment></environment>
        <key id="526005">SERVER-34436</key>
            <summary>Workloads to apply transaction snapshot cache pressure</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="13201">Fixed</resolution>
                                        <assignee username="dianna.hohensee@mongodb.com">Dianna Hohensee</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Thu, 12 Apr 2018 14:49:28 +0000</created>
                <updated>Sun, 29 Oct 2023 22:32:47 +0000</updated>
                            <resolved>Mon, 2 Jul 2018 17:45:34 +0000</resolved>
                                                    <fixVersion>4.1.1</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1920948" author="dianna.hohensee" created="Thu, 14 Jun 2018 18:04:49 +0000"  >&lt;p&gt;Turning this into a master ticket with linked tasks.&lt;/p&gt;</comment>
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            <issuekey id="566775">WT-4155</issuekey>
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            <issuekey id="559229">SERVER-35601</issuekey>
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            <issuelink>
            <issuekey id="559236">SERVER-35602</issuekey>
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