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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-45430] Optimize the way a transaction waits for the previous transaction&apos;s table update to be durable</title>
                <link>https://jira.mongodb.org/browse/SERVER-45430</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This came out of the work for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44260&quot; title=&quot;Transaction can conflict with previous transaction on the session if the all committed point is held back&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-44260&quot;&gt;&lt;del&gt;SERVER-44260&lt;/del&gt;&lt;/a&gt;. There are two optimizations we can make here:&lt;/p&gt;

&lt;p&gt;1. The bug should only apply to transactions using &lt;tt&gt;readConcern: snapshot&lt;/tt&gt;. We should check this before calling &lt;tt&gt;waitForAllEarlierOplogWritesToBeVisible()&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;2. Ideally, we could pass an optional timestamp parameter into &lt;tt&gt;waitForAllEarlierOplogWritesToBeVisible()&lt;/tt&gt; that specifies the timestamp the all_durable must reach before returning. This would be a weaker guarantee than waiting until the last oplog entry write is durable, but seems like a reasonable extension of this method.&lt;/p&gt;

&lt;p&gt;The TransactionParticipant can keep track of the timestamp of the last transaction table write (we only care about prepared commits and prepared aborts), which would be passed into &lt;tt&gt;waitForAllEarlierOplogWritesToBeVisible()&lt;/tt&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1081779">SERVER-45430</key>
            <summary>Optimize the way a transaction waits for the previous transaction&apos;s table update to be durable</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="pavithra.vetriselvan@mongodb.com">Pavithra Vetriselvan</reporter>
                        <labels>
                            <label>ShardedTxn:FutureOptimizations</label>
                    </labels>
                <created>Thu, 9 Jan 2020 14:08:31 +0000</created>
                <updated>Tue, 6 Dec 2022 02:38:46 +0000</updated>
                                                                            <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2718417" author="milkie" created="Fri, 10 Jan 2020 13:26:40 +0000"  >&lt;p&gt;Seems reasonable to me.&lt;/p&gt;</comment>
                            <comment id="2714212" author="pavithra.vetriselvan" created="Thu, 9 Jan 2020 14:11:47 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=milkie&quot; class=&quot;user-hover&quot; rel=&quot;milkie&quot;&gt;milkie&lt;/a&gt; Do the changes to &lt;tt&gt;waitForAllEarlierOplogWritesToBeVisible()&lt;/tt&gt; sound reasonable?&lt;/p&gt;</comment>
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