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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-17838] Find operations slow down over time as results of heap contention under stress</title>
                <link>https://jira.mongodb.org/browse/SERVER-17838</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Environment:&lt;br/&gt;
771f17-2015-03-30\bin&amp;gt;mongo.exe --version&lt;br/&gt;
MongoDB shell version: 3.0.2-pre-&lt;/p&gt;

&lt;p&gt;Stand alone Mongod, configured on Windows &lt;/p&gt;

&lt;p&gt;Test:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Hammer.Mongo - query only profile&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Expected - Steady state throughput.&lt;br/&gt;
Actual - Throughput slow down, more parallel query lower throughput &lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;See attached graph that highlight contention vs. I/O operation per sec&lt;/li&gt;
	&lt;li&gt;Profiler output highlight the malloc/free as hot function&lt;/li&gt;
&lt;/ol&gt;
</description>
                <environment></environment>
        <key id="193381">SERVER-17838</key>
            <summary>Find operations slow down over time as results of heap contention under stress</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="4">Incomplete</resolution>
                                        <assignee username="eitan.klein">Eitan Klein</assignee>
                                    <reporter username="eitan.klein">Eitan Klein</reporter>
                        <labels>
                            <label>32qa</label>
                    </labels>
                <created>Wed, 1 Apr 2015 13:20:29 +0000</created>
                <updated>Sat, 26 Sep 2015 11:48:58 +0000</updated>
                            <resolved>Sat, 26 Sep 2015 11:48:58 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                        <attachments>
                            <attachment id="69370" name="ProfilerHeap.png" size="209947" author="eitan.klein" created="Wed, 1 Apr 2015 13:20:29 +0000"/>
                            <attachment id="69369" name="heapContention.jpg" size="82699" author="eitan.klein" created="Wed, 1 Apr 2015 13:20:29 +0000"/>
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