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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-43976] send query in the secondary to query for very little data have same time is very slowly </title>
                <link>https://jira.mongodb.org/browse/SERVER-43976</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;hi&lt;/p&gt;

&lt;p&gt;&#160; &#160; we have a problem when we send query same litter data collections in secondary always appear same very slowly query problems ,every day about one or two times.in the slowly logs we could find the&#160;timeAcquiringMicros take the longest time in the query.i think if always appear this problem .maybe we can&apos;t use secondary as one of the query point for share the responsibility of primary .because this will block&#160; the query too long time.and let our program became dead.maybe in this time the&#160; ParallelBatchWriterMode is&#160;PBWM&#160;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;the log like this&#160;&lt;/p&gt;

&lt;p&gt;2019-10-12T07:34:50.684+0800 I COMMAND&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;conn1279777&amp;#93;&lt;/span&gt;&#160;command gacc.r_plugin command: find { find: &quot;r_plugin&quot;, filter:&lt;/p&gt;

{ type: &quot;h3c&quot; }
&lt;p&gt;, limit: 1, shardVersion: [ Timestamp 0|0, ObjectId(&apos;000000000000000000000000&apos;) ] } planSummary: IXSCAN { type: 1 } keysExamined:1 docsExamined:1 cursorExhausted:1 numYields:0 nreturned:1 reslen:350 locks:{ Global: { acquireCount:&lt;/p&gt;
{ r: 2 }
&lt;p&gt;, acquireWaitCount: { r: 1 }, timeAcquiringMicros: { r: 38560627 } }, Database: { acquireCount:{ r: 1 }}, Collection: { acquireCount:{ r: 1 }} } protocol:op_command 38560ms&lt;/p&gt;</description>
                <environment></environment>
        <key id="967967">SERVER-43976</key>
            <summary>send query in the secondary to query for very little data have same time is very slowly </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>
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                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="zhouhancang">hancang2000</reporter>
                        <labels>
                    </labels>
                <created>Sat, 12 Oct 2019 02:43:24 +0000</created>
                <updated>Mon, 14 Oct 2019 15:04:54 +0000</updated>
                            <resolved>Mon, 14 Oct 2019 15:04:54 +0000</resolved>
                                                                    <component>Querying</component>
                    <component>Replication</component>
                    <component>WiredTiger</component>
                                        <votes>0</votes>
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