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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-62193] Improve insert_vector secondary performance</title>
                <link>https://jira.mongodb.org/browse/SERVER-62193</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39950&quot; title=&quot;Merge two oplog batching code paths&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39950&quot;&gt;&lt;del&gt;SERVER-39950&lt;/del&gt;&lt;/a&gt; we merged some redundant code paths between sync tail and initial sync.  In doing so we lost some optimizations which affect the insert_vector test performance on secondaries.  &lt;/p&gt;

&lt;p&gt;The largest effect is probably the extra copy of the batch here&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/10gen/mongo/blob/857e5ff84b57167abcfb875c56a3cda1464de563/src/mongo/db/repl/oplog_batcher.cpp#L296&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/857e5ff84b57167abcfb875c56a3cda1464de563/src/mongo/db/repl/oplog_batcher.cpp#L296&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;But also note this pre-allocation may not be useful after removing that&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/10gen/mongo/blob/8c11a9d7c59a156619ba387be14eb584f979442a/src/mongo/db/repl/oplog_batcher.h#L50&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/8c11a9d7c59a156619ba387be14eb584f979442a/src/mongo/db/repl/oplog_batcher.h#L50&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;whereas pre-allocation here may be helpful&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/10gen/mongo/blob/857e5ff84b57167abcfb875c56a3cda1464de563/src/mongo/db/repl/oplog_batcher.cpp#L160&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/857e5ff84b57167abcfb875c56a3cda1464de563/src/mongo/db/repl/oplog_batcher.cpp#L160&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1954442">SERVER-62193</key>
            <summary>Improve insert_vector secondary performance</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-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="matthew.russotto@mongodb.com">Matthew Russotto</reporter>
                        <labels>
                    </labels>
                <created>Mon, 20 Dec 2021 18:48:38 +0000</created>
                <updated>Tue, 6 Dec 2022 00:42:51 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                    <issuelinks>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1867214">SERVER-59776</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1940792">SERVER-61843</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2011730">SERVER-65054</issuekey>
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