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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[COMPASS-6531] Investigate changes in SERVER-73571: CurOp::_lockStatsBase is never set</title>
                <link>https://jira.mongodb.org/browse/COMPASS-6531</link>
                <project id="13182" key="COMPASS">Compass </project>
                    <description>    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Original Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;    &quot;sub-operations&quot; will once again no longer double-count the locking statistics of their parent operation(s). This change surfaces in the profiler and currentOp output for sub-operations. This bug was originally fixed in 4.2, but resurfaced again in 5.0. &lt;/p&gt;

&lt;p&gt;There aren&apos;t many cases where sub-operations are reported in currentOp or the profiler output, but one example would be when an individual delete command includes multiple different deletes in the deletes array. Prior to this change, each delete would inherit the locking statistics of the parent operation, even if those lock stats weren&apos;t associated with that delete. Some additional information can be found in the original bug fix (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26854&quot; title=&quot;LockStats for sub-operations no longer include time for previous sub ops&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26854&quot;&gt;&lt;del&gt;SERVER-26854&lt;/del&gt;&lt;/a&gt;), though the repro included in that ticket no longer works.&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    Each CurOp is meant to store a snapshot of its opCtx&apos;s lock stats taken at the time of the CurOp&apos;s creation. These snapshots would then be used when retrieving the stats for a given sub-operation to subtract out any stats recorded by its super-operations.&lt;/p&gt;

&lt;p&gt;However, the snapshots are never actually being taken and stored properly, so this subtraction is never occurring. As a result, all sub-operations report lock acquisition stats made by their super-operations.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="2268191">COMPASS-6531</key>
            <summary>Investigate changes in SERVER-73571: CurOp::_lockStatsBase is never set</summary>
                <type id="10501" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Investigation</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="-1">Unassigned</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
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                <created>Fri, 17 Feb 2023 21:43:02 +0000</created>
                <updated>Fri, 24 Feb 2023 11:15:37 +0000</updated>
                            <resolved>Fri, 24 Feb 2023 11:15:37 +0000</resolved>
                                                    <fixVersion>No version</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="5228150" author="JIRAUSER1256529" created="Fri, 24 Feb 2023 11:15:37 +0000"  >&lt;p&gt;No devtools impact.&lt;/p&gt;</comment>
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