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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-69101] Remove WTPrepareConflictForReads fail point</title>
                <link>https://jira.mongodb.org/browse/SERVER-69101</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;WTPrepareConflictForReads&lt;/tt&gt; is checked within &lt;tt&gt;wiredTigerPrepareConflictRetry&lt;/tt&gt; which is an especially hot path. Some storage intensive queries spend more than one percent of their time just checking this fail point.&lt;/p&gt;

&lt;p&gt;Furthermore, the fail point is only used in &lt;a href=&quot;https://github.com/mongodb/mongo/blob/cfbd8f84498a748e81a904b44f5c16328b957e0c/jstests/noPassthrough/wt_prepare_conflict.js&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;one test&lt;/a&gt; which the storage exec team has agreed is of little value, and can be replaced with a unit test.&lt;/p&gt;

&lt;p&gt;This task is to:&lt;br/&gt;
a) Remove WTPrepareConflictForReads and associated test.&lt;br/&gt;
b) Add a unit test for &lt;tt&gt;wiredTigerPrepareConflictRetry&lt;/tt&gt; which provides a special callback that will simulate prepare conflicts.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2120397">SERVER-69101</key>
            <summary>Remove WTPrepareConflictForReads fail point</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="13201">Fixed</resolution>
                                        <assignee username="yuhong.zhang@mongodb.com">Yuhong Zhang</assignee>
                                    <reporter username="ian.boros@mongodb.com">Ian Boros</reporter>
                        <labels>
                            <label>storex-perf</label>
                    </labels>
                <created>Tue, 23 Aug 2022 19:42:04 +0000</created>
                <updated>Sun, 29 Oct 2023 21:34:04 +0000</updated>
                            <resolved>Tue, 28 Feb 2023 03:33:40 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5235189" author="xgen-internal-githook" created="Tue, 28 Feb 2023 03:28:18 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;yuhong.zhang@mongodb.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-69101&quot; title=&quot;Remove WTPrepareConflictForReads fail point&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-69101&quot;&gt;&lt;del&gt;SERVER-69101&lt;/del&gt;&lt;/a&gt; Remove WTPrepareConflictForReads fail point&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2309eaed5e2ab1a74edcdf1d202a0e4339689e1a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2309eaed5e2ab1a74edcdf1d202a0e4339689e1a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4771516" author="ian.boros" created="Tue, 23 Aug 2022 19:47:59 +0000"  >&lt;p&gt;For future reference, the query I was using to measure this change was on the bestbuy dataset using a column index:&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;</comment>
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            <issuekey id="2120534">SERVER-69105</issuekey>
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