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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-76413] Optimize how update stage guards against the Halloween problem during multi updates</title>
                <link>https://jira.mongodb.org/browse/SERVER-76413</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, the stage pessimistically assumes that any secondary index change during multi-update might lead to the Halloween problem, even if the changed index isn&apos;t used to scan the records (see `_updatedRecordIds` in UpdateStage). In most cases it means that if an update affects a secondary index, record ids of all updated records are temporarily stored by the stage, which might be quite a lot for some kinds of updates.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2320956">SERVER-76413</key>
            <summary>Optimize how update stage guards against the Halloween problem during multi updates</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="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="irina.yatsenko@mongodb.com">Irina Yatsenko</reporter>
                        <labels>
                    </labels>
                <created>Fri, 21 Apr 2023 15:04:32 +0000</created>
                <updated>Tue, 30 Jan 2024 15:21:28 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5411935" author="JIRAUSER1259274" created="Tue, 9 May 2023 16:06:01 +0000"  >&lt;p&gt;Yes, though we haven&apos;t measured the potential benefits (it can be done by comparing the baseline to a hacked build that doesn&apos;t guard against the Halloween problem on workloads that have secondary indexes but don&apos;t use index scan)&lt;/p&gt;</comment>
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