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    <title>MongoDB Jira</title>
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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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            <title>[SERVER-16879] Degraded performance on rc5 (mms-prod-pings1)</title>
                <link>https://jira.mongodb.org/browse/SERVER-16879</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is the same replica set as in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16482&quot; title=&quot;Decreased throughput due to changes in scheduling algorithm? (mms-prod-pings1)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16482&quot;&gt;&lt;del&gt;SERVER-16482&lt;/del&gt;&lt;/a&gt;.  The performance on rc4 (community) was measurably degraded from 2.6.6.  The suspected root cause of that is still under investigation as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16065&quot; title=&quot;Long flush pauses in MMAPv1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16065&quot;&gt;&lt;del&gt;SERVER-16065&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;We upgraded to rc5 (enterprise) regardless.  Unfortunately, rc5 (enterprise) displayed a severe degradation over rc4 (community).  Please see MMS charts below - note large spike in queues, decrease in opcounters.  &lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/attachment/61876/61876_pings-rc5.png&quot; width=&quot;90%&quot; style=&quot;border: 0px solid black&quot; /&gt;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;Will follow up with logs shortly.&lt;/p&gt;</description>
                <environment></environment>
        <key id="179037">SERVER-16879</key>
            <summary>Degraded performance on rc5 (mms-prod-pings1)</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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>
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                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="geert.bosch@mongodb.com">Geert Bosch</assignee>
                                    <reporter username="cailin.nelson@mongodb.com">Cailin Nelson</reporter>
                        <labels>
                    </labels>
                <created>Thu, 15 Jan 2015 20:46:58 +0000</created>
                <updated>Sun, 25 Jan 2015 18:39:22 +0000</updated>
                            <resolved>Thu, 22 Jan 2015 21:28:19 +0000</resolved>
                                    <version>2.8.0-rc5</version>
                                                    <component>Performance</component>
                                        <votes>0</votes>
                                    <watches>13</watches>
                                                                                                                <comments>
                            <comment id="812744" author="cailin.nelson@10gen.com" created="Sun, 25 Jan 2015 18:38:58 +0000"  >&lt;p&gt;We are pleased to confirm that, as of 3.0.0-rc6, we now have increased throughput on the newest version of MongoDB!&lt;/p&gt;</comment>
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                            <attachment id="61876" name="pings-rc5.png" size="194294" author="cailin.nelson@mongodb.com" created="Thu, 15 Jan 2015 20:46:58 +0000"/>
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