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    <title>MongoDB Jira</title>
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    <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-20493] CSRS with protocolVersion:0 is very slow due to waiting for committed snapshot advancement messages via heartbeats</title>
                <link>https://jira.mongodb.org/browse/SERVER-20493</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="230500">SERVER-20493</key>
            <summary>CSRS with protocolVersion:0 is very slow due to waiting for committed snapshot advancement messages via heartbeats</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                    </labels>
                <created>Fri, 18 Sep 2015 18:43:53 +0000</created>
                <updated>Thu, 14 Apr 2016 15:19:23 +0000</updated>
                            <resolved>Tue, 6 Oct 2015 14:13:07 +0000</resolved>
                                                                    <component>Replication</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1052429" author="milkie" created="Tue, 6 Oct 2015 14:13:07 +0000"  >&lt;p&gt;The default is now protocolVersion 1, so there should be no reason to run CSRS with pv0.  If one must, one can use the workaround described above.&lt;/p&gt;</comment>
                            <comment id="1042572" author="spencer" created="Thu, 24 Sep 2015 19:57:15 +0000"  >&lt;p&gt;We should revert &lt;a href=&quot;https://github.com/mongodb/mongo/blob/1af86515e2fa8b12ef697a4c1fc573ac6ae3cd03/src/mongo/shell/shardingtest.js#L353&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this line&lt;/a&gt; once this has been fixed&lt;/p&gt;</comment>
                            <comment id="1042361" author="xgen-internal-githook" created="Thu, 24 Sep 2015 17:57:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;stbrody&apos;, u&apos;name&apos;: u&apos;Spencer T Brody&apos;, u&apos;email&apos;: u&apos;spencer@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-20494&quot; title=&quot;Enable reading from CSRS secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-20494&quot;&gt;&lt;del&gt;SERVER-20494&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-20493&quot; title=&quot;CSRS with protocolVersion:0 is very slow due to waiting for committed snapshot advancement messages via heartbeats&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-20493&quot;&gt;&lt;del&gt;SERVER-20493&lt;/del&gt;&lt;/a&gt; Change CatalogManagerReplicaSet to use Nearest read preference&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/75f185e88b063ab13e0686552202de38618dec54&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/75f185e88b063ab13e0686552202de38618dec54&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1037136" author="spencer" created="Fri, 18 Sep 2015 18:47:02 +0000"  >&lt;p&gt;As a workaround you can turn the heartbeat frequency for the config server replica set down (setting it to 100ms instead of the default 2 seconds seems to make the issue more or less go away)&lt;/p&gt;</comment>
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            <issuekey id="230503">SERVER-20494</issuekey>
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                                        <issuelink>
            <issuekey id="231327">SERVER-20604</issuekey>
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