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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-30779] Investigate performance degradation in Causal Consistency enabled benchmark</title>
                <link>https://jira.mongodb.org/browse/SERVER-30779</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Investigate why causal consistency run shows the 6% and 10% drops in insert_vector_primary and insert_vector_secondary_overall tests&lt;/p&gt;

&lt;p&gt; &lt;a href=&quot;https://evergreen.mongodb.com/task/sys_perf_linux_3_node_replSet_core_workloads_WT_patch_583127818f1ead21b67a57eb117b9678232e5472_59974e03e3c33104980009e9_17_08_18_20_29_25#/%257B%2522perftab%2522%253A1%252C%2522compare%2522%253A%255B%257B%2522hash%2522%253A%2522583127818f1ead21b67a57eb117b9678232e5472%2522%257D%255D%257D&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://evergreen.mongodb.com/task/sys_perf_linux_3_node_replSet_core_workloads_WT_patch_583127818f1ead21b67a57eb117b9678232e5472_59974e03e3c33104980009e9_17_08_18_20_29_25#/%257B%2522perftab%2522%253A1%252C%2522compare%2522%253A%255B%257B%2522hash%2522%253A%2522583127818f1ead21b67a57eb117b9678232e5472%2522%257D%255D%257D&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;It should not cause degradation on w:1 inserts as those are not expected to wait. However the degradation can be explained because shell adds afterClusterTime concern to all commands including insert.&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/workloads/blob/c76a618683ee93029d0515457968400c23111c5a/workloads/insert_vector.js#L142&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/workloads/blob/c76a618683ee93029d0515457968400c23111c5a/workloads/insert_vector.js#L142&lt;/a&gt; is lint to the wait on secondaries.&lt;/p&gt;</description>
                <environment></environment>
        <key id="419014">SERVER-30779</key>
            <summary>Investigate performance degradation in Causal Consistency enabled benchmark</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="misha.tyulenev@mongodb.com">Misha Tyulenev</assignee>
                                    <reporter username="misha.tyulenev@mongodb.com">Misha Tyulenev</reporter>
                        <labels>
                    </labels>
                <created>Tue, 22 Aug 2017 18:54:36 +0000</created>
                <updated>Mon, 30 Oct 2023 23:14:06 +0000</updated>
                            <resolved>Thu, 16 Nov 2017 01:18:46 +0000</resolved>
                                                    <fixVersion>3.6.0-rc5</fixVersion>
                    <fixVersion>3.7.1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1727201" author="xgen-internal-githook" created="Thu, 16 Nov 2017 01:17:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Misha Tyulenev&apos;, &apos;username&apos;: &apos;mikety&apos;, &apos;email&apos;: &apos;misha@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30779&quot; title=&quot;Investigate performance degradation in Causal Consistency enabled benchmark&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30779&quot;&gt;&lt;del&gt;SERVER-30779&lt;/del&gt;&lt;/a&gt; do not sign clusterTime in mongos when auth is off or user has advanceClusterTime privilege&lt;/p&gt;

&lt;p&gt;(cherry picked from commit ad803634c69671ec7c43b0ca78edd30ad22b4e63)&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e82f61c0ea6678520f7731857c20051ad6c99ce4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e82f61c0ea6678520f7731857c20051ad6c99ce4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1727194" author="misha.tyulenev" created="Thu, 16 Nov 2017 01:11:31 +0000"  >&lt;p&gt;The performance is affected in part by mongos signing all the requests even when auth is off or when user is __system (or any user with advanceClusterTime privilege) . This is addressed by the commit.&lt;/p&gt;</comment>
                            <comment id="1727193" author="xgen-internal-githook" created="Thu, 16 Nov 2017 01:08:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Misha Tyulenev&apos;, &apos;username&apos;: &apos;mikety&apos;, &apos;email&apos;: &apos;misha@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30779&quot; title=&quot;Investigate performance degradation in Causal Consistency enabled benchmark&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30779&quot;&gt;&lt;del&gt;SERVER-30779&lt;/del&gt;&lt;/a&gt; do not sign clusterTime in mongos when auth is off or user has advanceClusterTime privilege&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ad803634c69671ec7c43b0ca78edd30ad22b4e63&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ad803634c69671ec7c43b0ca78edd30ad22b4e63&lt;/a&gt;&lt;/p&gt;</comment>
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