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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-16572] Add counter for calls to sched_yield in WiredTiger</title>
                <link>https://jira.mongodb.org/browse/SERVER-16572</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It appears that calls to sched_yield can be associated with performance issues; see for example &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16269?focusedCommentId=787146&amp;amp;page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-787146&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;this ticket&lt;/a&gt;. So it could be useful if the performance metrics included a counter for calls to sched_yield.&lt;/p&gt;</description>
                <environment></environment>
        <key id="175030">SERVER-16572</key>
            <summary>Add counter for calls to sched_yield in WiredTiger</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="sue.loverso@mongodb.com">Susan LoVerso</assignee>
                                    <reporter username="bruce.lucas@mongodb.com">Bruce Lucas</reporter>
                        <labels>
                    </labels>
                <created>Wed, 17 Dec 2014 14:04:43 +0000</created>
                <updated>Thu, 15 Jan 2015 16:46:46 +0000</updated>
                            <resolved>Fri, 2 Jan 2015 06:33:48 +0000</resolved>
                                                    <fixVersion>2.8.0-rc5</fixVersion>
                                    <component>Diagnostics</component>
                    <component>Performance</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>12</watches>
                                                                                                                <comments>
                            <comment id="791645" author="eliot" created="Sun, 21 Dec 2014 11:20:48 +0000"  >&lt;p&gt;I don&apos;t think is going to add anything.  The variably in cpu spin times and scheduling is going to market this incredibly erratic and noisy. And it could easily be a perf hit. Time would be useful but even more expensive.  &lt;/p&gt;</comment>
                            <comment id="789566" author="charlie.page@10gen.com" created="Thu, 18 Dec 2014 16:37:21 +0000"  >&lt;p&gt;If these stats are tied into mongtop, etc this strategy needs to consider how the stats are reported on long waits (i.e. would this cause a wait not to even be seen until it&apos;s completed?)&lt;/p&gt;</comment>
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