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<channel>
    <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>
    </build-info>


<item>
            <title>[SERVER-60594] mongos 4.4.8 slow on mongos,but fast on mongod </title>
                <link>https://jira.mongodb.org/browse/SERVER-60594</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;i upgrade from 4.4.4 to 4.4.8 cluster.&lt;br/&gt;
cluster has three mongos,three data nodes and one config using replicate with three nodes.&lt;br/&gt;
i recently i find many slow logs on mongos,op_msg more than 1000ms&#12290;but data node there is no any more than 100ms.&lt;/p&gt;

&lt;p&gt;i check io,mem,cpu, there is no stress on it. i guess exists problem on mongos.&lt;br/&gt;
but i can&apos;t find it.&lt;/p&gt;

&lt;p&gt;mongos slow log:&lt;br/&gt;
{&quot;t&quot;:&lt;/p&gt;
{&quot;$date&quot;:&quot;2021-10-11T21:15:25.154+08:00&quot;}
&lt;p&gt;,&quot;s&quot;:&quot;I&quot;,  &quot;c&quot;:&quot;COMMAND&quot;,  &quot;id&quot;:51803,   &quot;ctx&quot;:&quot;conn3042892&quot;,&quot;msg&quot;:&quot;Slow query&quot;,&quot;attr&quot;:{&quot;type&quot;:&quot;command&quot;,&quot;ns&quot;:&quot;wzjMonitor.expWzjMonitor&quot;,&quot;appName&quot;:&quot;wzj_op&quot;,&quot;command&quot;:{&quot;find&quot;:&quot;expWzjMonitor&quot;,&quot;filter&quot;:&lt;/p&gt;
{&quot;no&quot;:&quot;YT3224052005840&quot;}
&lt;p&gt;,&quot;projection&quot;:&lt;/p&gt;
{&quot;no&quot;:1,&quot;del&quot;:1,&quot;curT&quot;:1,&quot;oType&quot;:1,&quot;matOrg&quot;:1,&quot;_id&quot;:0}
&lt;p&gt;,&quot;$db&quot;:&quot;wzjMonitor&quot;,&quot;$clusterTime&quot;:{&quot;clusterTime&quot;:{&quot;$timestamp&quot;:{&quot;t&quot;:1633958124,&quot;i&quot;:152}},&quot;signature&quot;:{&quot;hash&quot;:{&quot;$binary&quot;:{&quot;base64&quot;:&quot;XbmmyAeBvyjB0IIpxpqKars52yg=&quot;,&quot;subType&quot;:&quot;0&quot;}},&quot;keyId&quot;:6958985885933109266}},&quot;lsid&quot;:{&quot;id&quot;:&lt;/p&gt;
{&quot;$uuid&quot;:&quot;5b593b65-b82d-40e8-8c94-682d9e4abc3d&quot;}
&lt;p&gt;}},&quot;nShards&quot;:1,&quot;cursorExhausted&quot;:true,&quot;numYields&quot;:0,&quot;nreturned&quot;:1,&quot;reslen&quot;:323,&quot;protocol&quot;:&quot;op_msg&quot;,&quot;durationMillis&quot;:1080}}&lt;/p&gt;

&lt;p&gt;but i execute it just 2ms.&lt;br/&gt;
mongos&amp;gt; db.expWzjMonitor.find(&lt;/p&gt;
{&quot;no&quot;:&quot;YT3224052005840&quot;}
&lt;p&gt;).projection(&lt;/p&gt;
{&quot;no&quot;:1,&quot;del&quot;:1,&quot;curT&quot;:1,&quot;oType&quot;:1,&quot;matOrg&quot;:1,&quot;_id&quot;:0}
&lt;p&gt;).explain(&quot;executionStats&quot;)&lt;br/&gt;
{&lt;br/&gt;
	&quot;queryPlanner&quot; : {&lt;br/&gt;
		&quot;mongosPlannerVersion&quot; : 1,&lt;br/&gt;
		&quot;winningPlan&quot; : {&lt;br/&gt;
			&quot;stage&quot; : &quot;SINGLE_SHARD&quot;,&lt;br/&gt;
			&quot;shards&quot; : [&lt;br/&gt;
				{&lt;br/&gt;
					&quot;shardName&quot; : &quot;shard2&quot;,&lt;br/&gt;
					&quot;connectionString&quot; : &quot;shard2/srvdb303.yto.cloud:21002,srvdb305.yto.cloud:21002,srvdb307.yto.cloud:21002&quot;,&lt;br/&gt;
					&quot;serverInfo&quot; : &lt;/p&gt;
{
						&quot;host&quot; : &quot;srvdb305.yto.cloud&quot;,
						&quot;port&quot; : 21002,
						&quot;version&quot; : &quot;4.4.8&quot;,
						&quot;gitVersion&quot; : &quot;83b8bb8b6b325d8d8d3dfd2ad9f744bdad7d6ca0&quot;
					}
&lt;p&gt;,&lt;br/&gt;
					&quot;plannerVersion&quot; : 1,&lt;br/&gt;
					&quot;namespace&quot; : &quot;wzjMonitor.expWzjMonitor&quot;,&lt;br/&gt;
					&quot;indexFilterSet&quot; : false,&lt;br/&gt;
					&quot;parsedQuery&quot; : {&lt;br/&gt;
						&quot;no&quot; : &lt;/p&gt;
{
							&quot;$eq&quot; : &quot;YT3224052005840&quot;
						}
&lt;p&gt;					},&lt;br/&gt;
					&quot;winningPlan&quot; : {&lt;br/&gt;
						&quot;stage&quot; : &quot;PROJECTION_SIMPLE&quot;,&lt;br/&gt;
						&quot;transformBy&quot; : &lt;/p&gt;
{
							&quot;no&quot; : 1,
							&quot;del&quot; : 1,
							&quot;curT&quot; : 1,
							&quot;oType&quot; : 1,
							&quot;matOrg&quot; : 1,
							&quot;_id&quot; : 0
						}
&lt;p&gt;,&lt;br/&gt;
						&quot;inputStage&quot; : {&lt;br/&gt;
							&quot;stage&quot; : &quot;SHARDING_FILTER&quot;,&lt;br/&gt;
							&quot;inputStage&quot; : {&lt;br/&gt;
								&quot;stage&quot; : &quot;FETCH&quot;,&lt;br/&gt;
								&quot;filter&quot; : {&lt;br/&gt;
									&quot;no&quot; : &lt;/p&gt;
{
										&quot;$eq&quot; : &quot;YT3224052005840&quot;
									}
&lt;p&gt;								},&lt;br/&gt;
								&quot;inputStage&quot; : {&lt;br/&gt;
									&quot;stage&quot; : &quot;IXSCAN&quot;,&lt;br/&gt;
									&quot;keyPattern&quot; : &lt;/p&gt;
{
										&quot;no&quot; : &quot;hashed&quot;
									}
&lt;p&gt;,&lt;br/&gt;
									&quot;indexName&quot; : &quot;no_hashed&quot;,&lt;br/&gt;
									&quot;isMultiKey&quot; : false,&lt;br/&gt;
									&quot;isUnique&quot; : false,&lt;br/&gt;
									&quot;isSparse&quot; : false,&lt;br/&gt;
									&quot;isPartial&quot; : false,&lt;br/&gt;
									&quot;indexVersion&quot; : 2,&lt;br/&gt;
									&quot;direction&quot; : &quot;forward&quot;,&lt;br/&gt;
									&quot;indexBounds&quot; : &lt;/p&gt;
{
										&quot;no&quot; : [
											&quot;[-857763331883698335, -857763331883698335]&quot;
										]
									}
&lt;p&gt;								}&lt;br/&gt;
							}&lt;br/&gt;
						}&lt;br/&gt;
					},&lt;br/&gt;
					&quot;rejectedPlans&quot; : [ ]&lt;br/&gt;
				}&lt;br/&gt;
			]&lt;br/&gt;
		}&lt;br/&gt;
	},&lt;br/&gt;
	&quot;executionStats&quot; : {&lt;br/&gt;
		&quot;nReturned&quot; : 1,&lt;br/&gt;
		&quot;executionTimeMillis&quot; : 2,&lt;br/&gt;
		&quot;totalKeysExamined&quot; : 1,&lt;br/&gt;
		&quot;totalDocsExamined&quot; : 1,&lt;br/&gt;
		&quot;executionStages&quot; : {&lt;br/&gt;
			&quot;stage&quot; : &quot;SINGLE_SHARD&quot;,&lt;br/&gt;
			&quot;nReturned&quot; : 1,&lt;br/&gt;
			&quot;executionTimeMillis&quot; : 2,&lt;br/&gt;
			&quot;totalKeysExamined&quot; : 1,&lt;br/&gt;
			&quot;totalDocsExamined&quot; : 1,&lt;br/&gt;
			&quot;totalChildMillis&quot; : NumberLong(0),&lt;br/&gt;
			&quot;shards&quot; : [&lt;br/&gt;
				{&lt;br/&gt;
					&quot;shardName&quot; : &quot;shard2&quot;,&lt;br/&gt;
					&quot;executionSuccess&quot; : true,&lt;br/&gt;
					&quot;nReturned&quot; : 1,&lt;br/&gt;
					&quot;executionTimeMillis&quot; : 0,&lt;br/&gt;
					&quot;totalKeysExamined&quot; : 1,&lt;br/&gt;
					&quot;totalDocsExamined&quot; : 1,&lt;br/&gt;
					&quot;executionStages&quot; : {&lt;br/&gt;
						&quot;stage&quot; : &quot;PROJECTION_SIMPLE&quot;,&lt;br/&gt;
						&quot;nReturned&quot; : 1,&lt;br/&gt;
						&quot;executionTimeMillisEstimate&quot; : 0,&lt;br/&gt;
						&quot;works&quot; : 2,&lt;br/&gt;
						&quot;advanced&quot; : 1,&lt;br/&gt;
						&quot;needTime&quot; : 0,&lt;br/&gt;
						&quot;needYield&quot; : 0,&lt;br/&gt;
						&quot;saveState&quot; : 0,&lt;br/&gt;
						&quot;restoreState&quot; : 0,&lt;br/&gt;
						&quot;isEOF&quot; : 1,&lt;br/&gt;
						&quot;transformBy&quot; : &lt;/p&gt;
{
							&quot;no&quot; : 1,
							&quot;del&quot; : 1,
							&quot;curT&quot; : 1,
							&quot;oType&quot; : 1,
							&quot;matOrg&quot; : 1,
							&quot;_id&quot; : 0
						}
&lt;p&gt;,&lt;br/&gt;
						&quot;inputStage&quot; : {&lt;br/&gt;
							&quot;stage&quot; : &quot;SHARDING_FILTER&quot;,&lt;br/&gt;
							&quot;nReturned&quot; : 1,&lt;br/&gt;
							&quot;executionTimeMillisEstimate&quot; : 0,&lt;br/&gt;
							&quot;works&quot; : 2,&lt;br/&gt;
							&quot;advanced&quot; : 1,&lt;br/&gt;
							&quot;needTime&quot; : 0,&lt;br/&gt;
							&quot;needYield&quot; : 0,&lt;br/&gt;
							&quot;saveState&quot; : 0,&lt;br/&gt;
							&quot;restoreState&quot; : 0,&lt;br/&gt;
							&quot;isEOF&quot; : 1,&lt;br/&gt;
							&quot;chunkSkips&quot; : 0,&lt;br/&gt;
							&quot;inputStage&quot; : {&lt;br/&gt;
								&quot;stage&quot; : &quot;FETCH&quot;,&lt;br/&gt;
								&quot;filter&quot; : {&lt;br/&gt;
									&quot;no&quot; : &lt;/p&gt;
{
										&quot;$eq&quot; : &quot;YT3224052005840&quot;
									}
&lt;p&gt;								},&lt;br/&gt;
								&quot;nReturned&quot; : 1,&lt;br/&gt;
								&quot;executionTimeMillisEstimate&quot; : 0,&lt;br/&gt;
								&quot;works&quot; : 2,&lt;br/&gt;
								&quot;advanced&quot; : 1,&lt;br/&gt;
								&quot;needTime&quot; : 0,&lt;br/&gt;
								&quot;needYield&quot; : 0,&lt;br/&gt;
								&quot;saveState&quot; : 0,&lt;br/&gt;
								&quot;restoreState&quot; : 0,&lt;br/&gt;
								&quot;isEOF&quot; : 1,&lt;br/&gt;
								&quot;docsExamined&quot; : 1,&lt;br/&gt;
								&quot;alreadyHasObj&quot; : 0,&lt;br/&gt;
								&quot;inputStage&quot; : {&lt;br/&gt;
									&quot;stage&quot; : &quot;IXSCAN&quot;,&lt;br/&gt;
									&quot;nReturned&quot; : 1,&lt;br/&gt;
									&quot;executionTimeMillisEstimate&quot; : 0,&lt;br/&gt;
									&quot;works&quot; : 2,&lt;br/&gt;
									&quot;advanced&quot; : 1,&lt;br/&gt;
									&quot;needTime&quot; : 0,&lt;br/&gt;
									&quot;needYield&quot; : 0,&lt;br/&gt;
									&quot;saveState&quot; : 0,&lt;br/&gt;
									&quot;restoreState&quot; : 0,&lt;br/&gt;
									&quot;isEOF&quot; : 1,&lt;br/&gt;
									&quot;keyPattern&quot; : &lt;/p&gt;
{
										&quot;no&quot; : &quot;hashed&quot;
									}
&lt;p&gt;,&lt;br/&gt;
									&quot;indexName&quot; : &quot;no_hashed&quot;,&lt;br/&gt;
									&quot;isMultiKey&quot; : false,&lt;br/&gt;
									&quot;isUnique&quot; : false,&lt;br/&gt;
									&quot;isSparse&quot; : false,&lt;br/&gt;
									&quot;isPartial&quot; : false,&lt;br/&gt;
									&quot;indexVersion&quot; : 2,&lt;br/&gt;
									&quot;direction&quot; : &quot;forward&quot;,&lt;br/&gt;
									&quot;indexBounds&quot; : &lt;/p&gt;
{
										&quot;no&quot; : [
											&quot;[-857763331883698335, -857763331883698335]&quot;
										]
									}
&lt;p&gt;,&lt;br/&gt;
									&quot;keysExamined&quot; : 1,&lt;br/&gt;
									&quot;seeks&quot; : 1,&lt;br/&gt;
									&quot;dupsTested&quot; : 0,&lt;br/&gt;
									&quot;dupsDropped&quot; : 0&lt;br/&gt;
								}&lt;br/&gt;
							}&lt;br/&gt;
						}&lt;br/&gt;
					}&lt;br/&gt;
				}&lt;br/&gt;
			]&lt;br/&gt;
		}&lt;br/&gt;
	},&lt;br/&gt;
	&quot;serverInfo&quot; : &lt;/p&gt;
{
		&quot;host&quot; : &quot;srvdb303.yto.cloud&quot;,
		&quot;port&quot; : 21051,
		&quot;version&quot; : &quot;4.4.8&quot;,
		&quot;gitVersion&quot; : &quot;83b8bb8b6b325d8d8d3dfd2ad9f744bdad7d6ca0&quot;
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;ok&quot; : 1,&lt;br/&gt;
	&quot;operationTime&quot; : Timestamp(1633958637, 1646),&lt;br/&gt;
	&quot;$clusterTime&quot; : {&lt;br/&gt;
		&quot;clusterTime&quot; : Timestamp(1633958637, 1649),&lt;br/&gt;
		&quot;signature&quot; : &lt;/p&gt;
{
			&quot;hash&quot; : BinData(0,&quot;yhztP+fehpQiXUYJNGyv/zitOrc=&quot;),
			&quot;keyId&quot; : NumberLong(&quot;6958985885933109266&quot;)
		}
&lt;p&gt;	}&lt;br/&gt;
}&lt;/p&gt;

</description>
                <environment></environment>
        <key id="1895021">SERVER-60594</key>
            <summary>mongos 4.4.8 slow on mongos,but fast on mongod </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="9">Done</resolution>
                                        <assignee username="edwin.zhou@mongodb.com">Edwin Zhou</assignee>
                                    <reporter username="601290552@qq.com">jing xu</reporter>
                        <labels>
                    </labels>
                <created>Mon, 11 Oct 2021 13:32:50 +0000</created>
                <updated>Sat, 14 May 2022 06:07:03 +0000</updated>
                            <resolved>Fri, 28 Jan 2022 21:26:25 +0000</resolved>
                                                                                        <votes>1</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4547863" author="601290552@qq.com" created="Sat, 14 May 2022 06:07:03 +0000"  >&lt;p&gt;hi edwin zhou:&lt;br/&gt;
    i remove serviceExecutor,but it is still slow.on mongos is 1484ms,but on shard is 1ms.&lt;br/&gt;
more mongos.log |grep 1234567&lt;br/&gt;
{&quot;t&quot;:&lt;/p&gt;
{&quot;$date&quot;:&quot;2022-05-14T13:24:22.449+08:00&quot;}
&lt;p&gt;,&quot;s&quot;:&quot;I&quot;,  &quot;c&quot;:&quot;COMMAND&quot;,  &quot;id&quot;:51803,  &lt;br/&gt;
 &quot;ctx&quot;:&quot;conn587389&quot;,&quot;msg&quot;:&quot;Slow query&quot;,&quot;attr&quot;:{&quot;type&quot;:&quot;command&quot;,&quot;ns&quot;:&quot;xiaoxu.orderMail&quot;,&lt;br/&gt;
 &quot;command&quot;:{&quot;find&quot;:&quot;OrderMail&quot;,&quot;filter&quot;:{&quot;$and&quot;:[&lt;/p&gt;
{&quot;mailNo&quot;:&quot;1234567&quot;}
&lt;p&gt;,{&quot;createTime&quot;:{&quot;$gte&quot;:&lt;/p&gt;
{&quot;$date&quot;:&quot;2022-04-14T05:24:20.968Z&quot;}
&lt;p&gt;}},&lt;br/&gt;
 {&quot;createTime&quot;:{&quot;$lte&quot;:&lt;/p&gt;
{&quot;$date&quot;:&quot;2022-05-15T05:24:20.968Z&quot;}
&lt;p&gt;}}]},&quot;sort&quot;:&lt;/p&gt;
{&quot;createTime&quot;:-1}
&lt;p&gt;,&lt;br/&gt;
&quot;nShards&quot;:1,&quot;cursorExhausted&quot;:true,&quot;numYields&quot;:0,&lt;br/&gt;
 &quot;nreturned&quot;:0,&quot;reslen&quot;:234,&quot;protocol&quot;:&quot;op_msg&quot;,&quot;durationMillis&quot;:1484}}&lt;/p&gt;



&lt;p&gt;more shard1.log&lt;br/&gt;
{&quot;t&quot;:&lt;/p&gt;
{&quot;$date&quot;:&quot;2022-05-14T13:24:22.449+08:00&quot;}
&lt;p&gt;,&quot;s&quot;:&quot;I&quot;,  &quot;c&quot;:&quot;COMMAND&quot;,  &quot;id&quot;:51803,   &quot;ctx&quot;:&quot;conn410512&quot;,&quot;msg&quot;:&quot;Slow query&quot;,&lt;br/&gt;
&quot;attr&quot;:{&quot;type&quot;:&quot;command&quot;,&quot;ns&quot;:&quot;xiaoxu.OrderMail&quot;,&quot;command&quot;:{&quot;find&quot;:&quot;OrderMail&quot;,&quot;filter&quot;:{&quot;$and&quot;:[&lt;/p&gt;
{&quot;mailNo&quot;:&quot;1234567&quot;}
&lt;p&gt;,&lt;br/&gt;
{&quot;createTime&quot;:{&quot;$gte&quot;:&lt;/p&gt;
{&quot;$date&quot;:&quot;2022-04-14T05:24:20.968Z&quot;}
&lt;p&gt;}},{&quot;createTime&quot;:{&quot;$lte&quot;:&lt;/p&gt;
{&quot;$date&quot;:&quot;2022-05-15T05:24:20.968Z&quot;}
&lt;p&gt;}}]},&lt;br/&gt;
&quot;sort&quot;:&lt;/p&gt;
{&quot;createTime&quot;:-1}
&lt;p&gt;,&lt;br/&gt;
&quot;storage&quot;:{},&quot;protocol&quot;:&quot;op_msg&quot;,&quot;durationMillis&quot;:1}}&lt;/p&gt;</comment>
                            <comment id="4322315" author="JIRAUSER1257066" created="Fri, 28 Jan 2022 21:26:26 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=601290552%40qq.com&quot; class=&quot;user-hover&quot; rel=&quot;601290552@qq.com&quot;&gt;601290552@qq.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;We haven&#8217;t heard back from you for some time, so I&#8217;m going to close this ticket. If this is still an issue for you, please provide additional information and we will reopen the ticket.&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                            <comment id="4280845" author="JIRAUSER1257066" created="Fri, 7 Jan 2022 17:38:42 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=601290552%40qq.com&quot; class=&quot;user-hover&quot; rel=&quot;601290552@qq.com&quot;&gt;601290552@qq.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;We still need additional information to diagnose the problem. If this is still an issue for you, would you please let us know if performance has improved after disabling the serviceExecutro setting?&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                            <comment id="4264176" author="JIRAUSER1257066" created="Wed, 22 Dec 2021 16:26:26 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=601290552%40qq.com&quot; class=&quot;user-hover&quot; rel=&quot;601290552@qq.com&quot;&gt;601290552@qq.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I tremendously appreciate your patience and I apologize for the wait as I investigate this issue.&lt;/p&gt;

&lt;p&gt;I believe that the reason for increased latency on the mongos is because serviceExecutor is set to adaptive.&lt;br/&gt;
 &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/attachment/352212/352212_Screen+Shot+2021-12-22+at+11.18.43+AM.png&quot; width=&quot;100%&quot; style=&quot;border: 0px solid black&quot; /&gt;&lt;/span&gt;&lt;br/&gt;
At &lt;b&gt;C&lt;/b&gt; &lt;em&gt;2021-11-05T09:35:00.584Z&lt;/em&gt;, the service executor starts to kick in, and 2 seconds later at D, the slow log lines start to appear.&lt;/p&gt;

&lt;p&gt; I recommend removing the serviceExecutor setting on all of your config files. We&apos;re interesting in hearing if performance improves after this setting is disabled.&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                            <comment id="4258168" author="601290552@qq.com" created="Sat, 18 Dec 2021 07:08:41 +0000"  >&lt;p&gt;Hi Edwin:&lt;br/&gt;
     is it ok?&lt;/p&gt;</comment>
                            <comment id="4202729" author="601290552@qq.com" created="Sat, 20 Nov 2021 06:50:20 +0000"  >&lt;p&gt;Hi Edwin:&lt;br/&gt;
  i have upload six files to support uploader link.please help me anlayze it .tks.&lt;br/&gt;
this link is:&lt;br/&gt;
curl -X POST &lt;a href=&quot;https://upload.box.com/api/2.0/files/content&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://upload.box.com/api/2.0/files/content&lt;/a&gt; \&lt;br/&gt;
-H &apos;Authorization: Bearer 1!nT3yRosOCSe_UNZDQ9hFZRhc0UvI9l8KqQDkMYlYiWHqwvpJgQipZBt4M7AuHqELswFtEb9Cfl_-7knVItKkRwGq4bHz6dxG9moKgA3IdvvmSXYMJJJrZNdV4kKI3p3s4QfJouTRK4KuHPp0AL6LsKjW6Fe6oNA6psmqV-sB7LLgkaGfnJTzZ4gOuvMT0BmNDfCOsZ0jbcGW88_-Lafk_-3VjldfhVbxEMVyevJMwKpLigjH5Vu9957CLP55KUTeXbxzMcy-mtAZPoOfNYSBXzYnvH9U6H9oks3qZZkjtD2P4XliFom43tL5j4yGV5uUa-cNqSgrCmWCIn1DPh0rQ2-w60ke6yTmZhfa8lMofzKKtQxCg7DbqDkGJ3qwFMiTmb62VGsLu6iK3RQwXsoo70AgM8o.&apos; \&lt;br/&gt;
-H &apos;Content-Type: multipart/form-data&apos; \&lt;br/&gt;
-F attributes=&apos;{&quot;name&quot;: &quot;&amp;lt;filename&amp;gt;&quot;, &quot;parent&quot;: {&quot;id&quot;: &quot;148229314081&quot;}}&apos; \&lt;br/&gt;
-F file=@&amp;lt;filename&amp;gt; &amp;gt; /dev/null&lt;/p&gt;



&lt;p&gt;for example:&lt;/p&gt;


&lt;p&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;root@~&amp;#93;&lt;/span&gt;# curl -X POST &lt;a href=&quot;https://upload.box.com/api/2.0/files/content&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://upload.box.com/api/2.0/files/content&lt;/a&gt; \&lt;br/&gt;
&amp;gt; -H &apos;Authorization: Bearer 1!nT3yRosOCSe_UNZDQ9hFZRhc0UvI9l8KqQDkMYlYiWHqwvpJgQipZBt4M7AuHqELswFtEb9Cfl_-7knVItKkRwGq4bHz6dxG9moKgA3IdvvmSXYMJJJrZNdV4kKI3p3s4QfJouTRK4KuHPp0AL6LsKjW6Fe6oNA6psmqV-sB7LLgkaGfnJTzZ4gOuvMT0BmNDfCOsZ0jbcGW88_-Lafk_-3VjldfhVbxEMVyevJMwKpLigjH5Vu9957CLP55KUTeXbxzMcy-mtAZPoOfNYSBXzYnvH9U6H9oks3qZZkjtD2P4XliFom43tL5j4yGV5uUa-cNqSgrCmWCIn1DPh0rQ2-w60ke6yTmZhfa8lMofzKKtQxCg7DbqDkGJ3qwFMiTmb62VGsLu6iK3RQwXsoo70AgM8o.&apos; \&lt;br/&gt;
&amp;gt; -H &apos;Content-Type: multipart/form-data&apos; \&lt;br/&gt;
&amp;gt; -F attributes=&apos;{&quot;name&quot;: &quot;mongod21001.log.2021-11-05T16-00-01.tar&quot;, &quot;parent&quot;: {&quot;id&quot;: &quot;148229314081&quot;}}&apos; \&lt;br/&gt;
&amp;gt; -F file=@mongod21001.log.2021-11-05T16-00-01.tar &amp;gt; /dev/null&lt;br/&gt;
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current&lt;br/&gt;
                                 Dload  Upload   Total   Spent    Left  Speed&lt;br/&gt;
100 25.3M  100  1190  100 25.3M     41   908k  0:00:29  0:00:28  0:00:01 3672k&lt;br/&gt;
&lt;span class=&quot;error&quot;&gt;&amp;#91;root@ ~&amp;#93;&lt;/span&gt;# curl -X POST &lt;a href=&quot;https://upload.box.com/api/2.0/files/content&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://upload.box.com/api/2.0/files/content&lt;/a&gt; \&lt;br/&gt;
&amp;gt; -H &apos;Authorization: Bearer 1!nT3yRosOCSe_UNZDQ9hFZRhc0UvI9l8KqQDkMYlYiWHqwvpJgQipZBt4M7AuHqELswFtEb9Cfl_-7knVItKkRwGq4bHz6dxG9moKgA3IdvvmSXYMJJJrZNdV4kKI3p3s4QfJouTRK4KuHPp0AL6LsKjW6Fe6oNA6psmqV-sB7LLgkaGfnJTzZ4gOuvMT0BmNDfCOsZ0jbcGW88_-Lafk_-3VjldfhVbxEMVyevJMwKpLigjH5Vu9957CLP55KUTeXbxzMcy-mtAZPoOfNYSBXzYnvH9U6H9oks3qZZkjtD2P4XliFom43tL5j4yGV5uUa-cNqSgrCmWCIn1DPh0rQ2-w60ke6yTmZhfa8lMofzKKtQxCg7DbqDkGJ3qwFMiTmb62VGsLu6iK3RQwXsoo70AgM8o.&apos; \&lt;br/&gt;
&amp;gt; -H &apos;Content-Type: multipart/form-data&apos; \&lt;br/&gt;
&amp;gt; -F attributes=&apos;{&quot;name&quot;: &quot;mongos.log.2021-11-05T16-00-01.bad.tar&quot;, &quot;parent&quot;: {&quot;id&quot;: &quot;148229314081&quot;}}&apos; \&lt;br/&gt;
&amp;gt; -F file=@mongos.log.2021-11-05T16-00-01.bad.tar &amp;gt; /dev/null&lt;br/&gt;
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current&lt;br/&gt;
                                 Dload  Upload   Total   Spent    Left  Speed&lt;br/&gt;
100  274M  100  1190  100  274M      2   686k  0:09:55  0:06:49  0:03:06 3648k&lt;/p&gt;


&lt;p&gt;&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root   211510092 11&#26376;  6 12:42 config.diagnostic.data.tar&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root     2809498 11&#26376;  6 12:42 config.log.2021-11-05T16-00-01.tar&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root   210495777 11&#26376;  6 12:42 mongod21001.diagnostic.data.tar&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root   217081963 11&#26376;  6 12:42 mongos.diagnostic.data.tar&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root   287995774 11&#26376;  6 12:42 mongos.log.2021-11-05T16-00-01.bad.tar&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root    26528629 11&#26376;  6 12:42 mongod21001.log.2021-11-05T16-00-01.tar&lt;/p&gt;</comment>
                            <comment id="4201695" author="JIRAUSER1257066" created="Fri, 19 Nov 2021 20:22:31 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=601290552%40qq.com&quot; class=&quot;user-hover&quot; rel=&quot;601290552@qq.com&quot;&gt;601290552@qq.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I deeply apologize for the delay in my response. Unfortunately, I wasn&apos;t able to find any diagnostic data in the upload portal and it appears that the link has now expired. Here is another &lt;a href=&quot;https://amphora.corp.mongodb.com/public/upload/eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJmb2xkZXJfaWQiOiIxNDgyMjkzMTQwODEiLCJleHAiOjE2Mzk5NDUyMzd9.8mbF4wKA3mZSyE5uja4JAkNoPoHZcQ9relEvuq3LHBY&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;support uploader link&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;
</comment>
                            <comment id="4184848" author="601290552@qq.com" created="Fri, 12 Nov 2021 05:23:23 +0000"  >&lt;p&gt;Hi Edwin:&lt;br/&gt;
     it is ok?&lt;/p&gt;</comment>
                            <comment id="4173100" author="601290552@qq.com" created="Sat, 6 Nov 2021 05:09:28 +0000"  >&lt;p&gt;collection expInfos read write latencyStats for all shard less than 1ms.&lt;br/&gt;
mongos&amp;gt; db.expInfos.latencyStats({}).pretty();&lt;br/&gt;
{&lt;br/&gt;
	&quot;ns&quot; : &quot;expMonitordb.expInfos&quot;,&lt;br/&gt;
	&quot;shard&quot; : &quot;shard2&quot;,&lt;br/&gt;
	&quot;localTime&quot; : ISODate(&quot;2021-11-06T05:02:20.602Z&quot;),&lt;br/&gt;
	&quot;latencyStats&quot; : {&lt;br/&gt;
		&quot;reads&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;5859860908720&quot;),
			&quot;ops&quot; : NumberLong(&quot;37615589290&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;writes&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;10417613930579&quot;),
			&quot;ops&quot; : NumberLong(&quot;46642821404&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;commands&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;5699662536&quot;),
			&quot;ops&quot; : NumberLong(167013)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;transactions&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(0),
			&quot;ops&quot; : NumberLong(0)
		}
&lt;p&gt;	}&lt;br/&gt;
}&lt;br/&gt;
{&lt;br/&gt;
	&quot;ns&quot; : &quot;expMonitordb.expInfos&quot;,&lt;br/&gt;
	&quot;shard&quot; : &quot;shard1&quot;,&lt;br/&gt;
	&quot;localTime&quot; : ISODate(&quot;2021-11-06T05:02:20.603Z&quot;),&lt;br/&gt;
	&quot;latencyStats&quot; : {&lt;br/&gt;
		&quot;reads&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;1567670429936&quot;),
			&quot;ops&quot; : NumberLong(&quot;9148125487&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;writes&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;2486299823686&quot;),
			&quot;ops&quot; : NumberLong(&quot;10949404338&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;commands&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(3454887),
			&quot;ops&quot; : NumberLong(136413)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;transactions&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(0),
			&quot;ops&quot; : NumberLong(0)
		}
&lt;p&gt;	}&lt;br/&gt;
}&lt;br/&gt;
{&lt;br/&gt;
	&quot;ns&quot; : &quot;expMonitordb.expInfos&quot;,&lt;br/&gt;
	&quot;shard&quot; : &quot;shard3&quot;,&lt;br/&gt;
	&quot;localTime&quot; : ISODate(&quot;2021-11-06T05:02:20.602Z&quot;),&lt;br/&gt;
	&quot;latencyStats&quot; : {&lt;br/&gt;
		&quot;reads&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;2870996851142&quot;),
			&quot;ops&quot; : NumberLong(&quot;21898375246&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;writes&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;5975989252073&quot;),
			&quot;ops&quot; : NumberLong(&quot;26883638500&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;commands&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(3471878),
			&quot;ops&quot; : NumberLong(161625)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;transactions&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(0),
			&quot;ops&quot; : NumberLong(0)
		}
&lt;p&gt;	}&lt;br/&gt;
}&lt;br/&gt;
{&lt;br/&gt;
	&quot;ns&quot; : &quot;expMonitordb.expInfos&quot;,&lt;br/&gt;
	&quot;shard&quot; : &quot;shard4&quot;,&lt;br/&gt;
	&quot;localTime&quot; : ISODate(&quot;2021-11-06T05:02:20.603Z&quot;),&lt;br/&gt;
	&quot;latencyStats&quot; : {&lt;br/&gt;
		&quot;reads&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;5088637166162&quot;),
			&quot;ops&quot; : NumberLong(&quot;37545121408&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;writes&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;10874201314068&quot;),
			&quot;ops&quot; : NumberLong(&quot;46555568313&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;commands&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;2524085012&quot;),
			&quot;ops&quot; : NumberLong(166565)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;transactions&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(0),
			&quot;ops&quot; : NumberLong(0)
		}
&lt;p&gt;	}&lt;br/&gt;
}&lt;br/&gt;
{&lt;br/&gt;
	&quot;ns&quot; : &quot;expMonitordb.expInfos&quot;,&lt;br/&gt;
	&quot;shard&quot; : &quot;shard5&quot;,&lt;br/&gt;
	&quot;localTime&quot; : ISODate(&quot;2021-11-06T05:02:20.602Z&quot;),&lt;br/&gt;
	&quot;latencyStats&quot; : {&lt;br/&gt;
		&quot;reads&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;5212380349074&quot;),
			&quot;ops&quot; : NumberLong(&quot;35428495213&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;writes&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;10305021739249&quot;),
			&quot;ops&quot; : NumberLong(&quot;43890507895&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;commands&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;2370567887&quot;),
			&quot;ops&quot; : NumberLong(165245)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;transactions&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(0),
			&quot;ops&quot; : NumberLong(0)
		}
&lt;p&gt;	}&lt;br/&gt;
}&lt;br/&gt;
{&lt;br/&gt;
	&quot;ns&quot; : &quot;expMonitordb.expInfos&quot;,&lt;br/&gt;
	&quot;shard&quot; : &quot;shard6&quot;,&lt;br/&gt;
	&quot;localTime&quot; : ISODate(&quot;2021-11-06T05:02:20.603Z&quot;),&lt;br/&gt;
	&quot;latencyStats&quot; : {&lt;br/&gt;
		&quot;reads&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;6184783099730&quot;),
			&quot;ops&quot; : NumberLong(&quot;36255590047&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;writes&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;11301554888483&quot;),
			&quot;ops&quot; : NumberLong(&quot;44929440018&quot;)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;commands&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(&quot;6023699670&quot;),
			&quot;ops&quot; : NumberLong(165685)
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;transactions&quot; : &lt;/p&gt;
{
			&quot;latency&quot; : NumberLong(0),
			&quot;ops&quot; : NumberLong(0)
		}
&lt;p&gt;	}&lt;br/&gt;
}&lt;/p&gt;</comment>
                            <comment id="4173099" author="601290552@qq.com" created="Sat, 6 Nov 2021 04:53:51 +0000"  >&lt;p&gt;Hi Edwin:&lt;br/&gt;
i has upload it.&lt;br/&gt;
the following files:&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root   211510092 11&#26376;  6 12:42 config.diagnostic.data.tar&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root     2809498 11&#26376;  6 12:42   config.log.2021-11-05T16-00-01.tar&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root   217081963 11&#26376;  6 12:42 mongos.diagnostic.data.tar&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root   287995774 11&#26376;  6 12:42  mongos.log.2021-11-05T16-00-01.bad.tar&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root    26528629 11&#26376;  6 12:42   mongod21001.log.2021-11-05T16-00-01.tar&lt;br/&gt;
&lt;del&gt;rw-r&lt;/del&gt;&lt;del&gt;r&lt;/del&gt;-.  1 root root   210495777 11&#26376;  6 12:42 mongod21001.diagnostic.data.tar&lt;/p&gt;

&lt;p&gt;for example the collection is expInfos&lt;/p&gt;

&lt;p&gt;from 2021.11.05 00:00:00 to  2021.11.06 00:00:00&lt;br/&gt;
from one mongos slow log more than 100ms:&lt;br/&gt;
 more  mongos.log.2021-11-05T16-00-01 |grep expInfos |wc -l&lt;br/&gt;
1620425&lt;br/&gt;
from one shard slow log more than 100ms:&lt;br/&gt;
&lt;span class=&quot;error&quot;&gt;&amp;#91;mongo@srvdb1 log&amp;#93;&lt;/span&gt;$ more shard1.log.2021-11-05T16-00-01 |grep expInfos |wc -l&lt;br/&gt;
21052&lt;/p&gt;

&lt;p&gt;there are six shards,every shard slow log is near the same.&lt;br/&gt;
so that one day total  slow log from all shards:140000 more than 100ms.&lt;br/&gt;
but one mongos has 1620425 more than 100ms.&lt;/p&gt;

&lt;p&gt;so mongos has bottleneck.&lt;/p&gt;
</comment>
                            <comment id="4170719" author="601290552@qq.com" created="Fri, 5 Nov 2021 01:11:22 +0000"  >&lt;p&gt;Hi Edwin:&lt;br/&gt;
    I forgot it.i will upload it later.&lt;/p&gt;</comment>
                            <comment id="4170445" author="JIRAUSER1257066" created="Thu, 4 Nov 2021 21:17:39 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=601290552%40qq.com&quot; class=&quot;user-hover&quot; rel=&quot;601290552@qq.com&quot;&gt;601290552@qq.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;We still need additional information to diagnose the problem. If this is still an issue for you, would you please upload mongod.log files from the requested nodes covering the incident and the &lt;tt&gt;$dbpath/diagnostic.data&lt;/tt&gt;?&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                            <comment id="4130156" author="JIRAUSER1257066" created="Mon, 18 Oct 2021 17:29:22 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=601290552%40qq.com&quot; class=&quot;user-hover&quot; rel=&quot;601290552@qq.com&quot;&gt;601290552@qq.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;To investigate this as a possible bug, we&apos;d like information from the following nodes in the cluster:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;The mongos where you run the command&lt;/li&gt;
	&lt;li&gt;The config server primary&lt;/li&gt;
	&lt;li&gt;The &lt;a href=&quot;https://docs.mongodb.com/manual/core/sharded-cluster-shards/#primary-shard&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;primary shard&lt;/a&gt; for the database.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;For each of these nodes, please archive (tar or zip) the mongod.log files covering the incident and the &lt;tt&gt;$dbpath/diagnostic.data&lt;/tt&gt; directory (the contents are described &lt;a href=&quot;https://docs.mongodb.com/manual/administration/analyzing-mongodb-performance/#full-time-diagnostic-data-capture&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;)&lt;/p&gt;

&lt;p&gt;I&apos;ve created a secure &lt;a href=&quot;https://amphora.corp.mongodb.com/public/upload/eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJmb2xkZXJfaWQiOiIxNDgyMjkzMTQwODEiLCJleHAiOjE2MzcxNzAwNzd9.IHxYV4f8WDH4GcjCV6v_8pWoW79k_ncUfnB-Xre-J7w&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;upload portal&lt;/a&gt; for you. Files uploaded to this portal are hosted on Box, are visible only to MongoDB employees.&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                            <comment id="4115569" author="601290552@qq.com" created="Mon, 11 Oct 2021 13:37:00 +0000"  >&lt;p&gt;i upgrade from 4.4.4 to 4.4.8 cluster.&lt;br/&gt;
cluster has three mongos,three data nodes and one config using replicate with three nodes.&lt;br/&gt;
i recently i find many slow logs on mongos,op_msg more than 1000ms&#12290;but data node there is no any more than 100ms.&lt;/p&gt;

&lt;p&gt;i check io,mem,cpu, there is no stress on it. i guess exists problem on mongos.&lt;br/&gt;
but i can&apos;t find it.&lt;/p&gt;

&lt;p&gt;mongos slow log:&lt;br/&gt;
{&quot;t&quot;:&lt;/p&gt;

{&quot;$date&quot;:&quot;2021-10-11T21:15:25.154+08:00&quot;}
&lt;p&gt;,&quot;s&quot;:&quot;I&quot;, &quot;c&quot;:&quot;COMMAND&quot;, &quot;id&quot;:51803, &quot;ctx&quot;:&quot;conn3042892&quot;,&quot;msg&quot;:&quot;Slow query&quot;,&quot;attr&quot;:{&quot;type&quot;:&quot;command&quot;,&quot;ns&quot;:&quot;wzjMonitor.expWzjMonitor&quot;,&quot;appName&quot;:&quot;wzj_op&quot;,&quot;command&quot;:{&quot;find&quot;:&quot;expWzjMonitor&quot;,&quot;filter&quot;:&lt;/p&gt;

{&quot;no&quot;:&quot;103224052005840&quot;}
&lt;p&gt;,&quot;projection&quot;:&lt;/p&gt;

{&quot;no&quot;:1,&quot;del&quot;:1,&quot;curT&quot;:1,&quot;oType&quot;:1,&quot;matOrg&quot;:1,&quot;_id&quot;:0}
&lt;p&gt;,&quot;$db&quot;:&quot;wzjMonitor&quot;,&quot;$clusterTime&quot;:{&quot;clusterTime&quot;:{&quot;$timestamp&quot;:{&quot;t&quot;:1633958124,&quot;i&quot;:152}},&quot;signature&quot;:{&quot;hash&quot;:{&quot;$binary&quot;:{&quot;base64&quot;:&quot;XbmmyAeBvyjB0IIpxpqKars52yg=&quot;,&quot;subType&quot;:&quot;0&quot;}},&quot;keyId&quot;:6958985885933109266}},&quot;lsid&quot;:{&quot;id&quot;:&lt;/p&gt;

{&quot;$uuid&quot;:&quot;5b593b65-b82d-40e8-8c94-682d9e4abc3d&quot;}
&lt;p&gt;}},&quot;nShards&quot;:1,&quot;cursorExhausted&quot;:true,&quot;numYields&quot;:0,&quot;nreturned&quot;:1,&quot;reslen&quot;:323,&quot;protocol&quot;:&quot;op_msg&quot;,&quot;durationMillis&quot;:1080}}&lt;/p&gt;

&lt;p&gt;but i execute it just 2ms.&lt;br/&gt;
mongos&amp;gt; db.expWzjMonitor.find(&lt;/p&gt;

{&quot;no&quot;:&quot;103224052005840&quot;}
&lt;p&gt;).projection(&lt;/p&gt;

{&quot;no&quot;:1,&quot;del&quot;:1,&quot;curT&quot;:1,&quot;oType&quot;:1,&quot;matOrg&quot;:1,&quot;_id&quot;:0}
&lt;p&gt;).explain(&quot;executionStats&quot;)&lt;br/&gt;
{&lt;br/&gt;
&quot;queryPlanner&quot; : {&lt;br/&gt;
&quot;mongosPlannerVersion&quot; : 1,&lt;br/&gt;
&quot;winningPlan&quot; : {&lt;br/&gt;
&quot;stage&quot; : &quot;SINGLE_SHARD&quot;,&lt;br/&gt;
&quot;shards&quot; : [&lt;br/&gt;
{&lt;br/&gt;
&quot;shardName&quot; : &quot;shard2&quot;,&lt;br/&gt;
&quot;connectionString&quot; : &quot;shard2/srvdb303.yto.cloud:21002,srvdb305.yto.cloud:21002,srvdb307.yto.cloud:21002&quot;,&lt;br/&gt;
&quot;serverInfo&quot; :&lt;/p&gt;

{ &quot;host&quot; : &quot;srvdb305.yto.cloud&quot;, &quot;port&quot; : 21002, &quot;version&quot; : &quot;4.4.8&quot;, &quot;gitVersion&quot; : &quot;83b8bb8b6b325d8d8d3dfd2ad9f744bdad7d6ca0&quot; }
&lt;p&gt;,&lt;br/&gt;
&quot;plannerVersion&quot; : 1,&lt;br/&gt;
&quot;namespace&quot; : &quot;wzjMonitor.expWzjMonitor&quot;,&lt;br/&gt;
&quot;indexFilterSet&quot; : false,&lt;br/&gt;
&quot;parsedQuery&quot; : {&lt;br/&gt;
&quot;no&quot; :&lt;/p&gt;

{ &quot;$eq&quot; : &quot;YT3224052005840&quot; }
&lt;p&gt;},&lt;br/&gt;
&quot;winningPlan&quot; : {&lt;br/&gt;
&quot;stage&quot; : &quot;PROJECTION_SIMPLE&quot;,&lt;br/&gt;
&quot;transformBy&quot; :&lt;/p&gt;

{ &quot;no&quot; : 1, &quot;del&quot; : 1, &quot;curT&quot; : 1, &quot;oType&quot; : 1, &quot;matOrg&quot; : 1, &quot;_id&quot; : 0 }
&lt;p&gt;,&lt;br/&gt;
&quot;inputStage&quot; : {&lt;br/&gt;
&quot;stage&quot; : &quot;SHARDING_FILTER&quot;,&lt;br/&gt;
&quot;inputStage&quot; : {&lt;br/&gt;
&quot;stage&quot; : &quot;FETCH&quot;,&lt;br/&gt;
&quot;filter&quot; : {&lt;br/&gt;
&quot;no&quot; :&lt;/p&gt;

{ &quot;$eq&quot; : &quot;YT3224052005840&quot; }
&lt;p&gt;},&lt;br/&gt;
&quot;inputStage&quot; : {&lt;br/&gt;
&quot;stage&quot; : &quot;IXSCAN&quot;,&lt;br/&gt;
&quot;keyPattern&quot; :&lt;/p&gt;

{ &quot;no&quot; : &quot;hashed&quot; }
&lt;p&gt;,&lt;br/&gt;
&quot;indexName&quot; : &quot;no_hashed&quot;,&lt;br/&gt;
&quot;isMultiKey&quot; : false,&lt;br/&gt;
&quot;isUnique&quot; : false,&lt;br/&gt;
&quot;isSparse&quot; : false,&lt;br/&gt;
&quot;isPartial&quot; : false,&lt;br/&gt;
&quot;indexVersion&quot; : 2,&lt;br/&gt;
&quot;direction&quot; : &quot;forward&quot;,&lt;br/&gt;
&quot;indexBounds&quot; :&lt;/p&gt;

{ &quot;no&quot; : [ &quot;[-857763331883698335, -857763331883698335]&quot; ] }
&lt;p&gt;}&lt;br/&gt;
}&lt;br/&gt;
}&lt;br/&gt;
},&lt;br/&gt;
&quot;rejectedPlans&quot; : [ ]&lt;br/&gt;
}&lt;br/&gt;
]&lt;br/&gt;
}&lt;br/&gt;
},&lt;br/&gt;
&quot;executionStats&quot; : {&lt;br/&gt;
&quot;nReturned&quot; : 1,&lt;br/&gt;
&quot;executionTimeMillis&quot; : 2,&lt;br/&gt;
&quot;totalKeysExamined&quot; : 1,&lt;br/&gt;
&quot;totalDocsExamined&quot; : 1,&lt;br/&gt;
&quot;executionStages&quot; : {&lt;br/&gt;
&quot;stage&quot; : &quot;SINGLE_SHARD&quot;,&lt;br/&gt;
&quot;nReturned&quot; : 1,&lt;br/&gt;
&quot;executionTimeMillis&quot; : 2,&lt;br/&gt;
&quot;totalKeysExamined&quot; : 1,&lt;br/&gt;
&quot;totalDocsExamined&quot; : 1,&lt;br/&gt;
&quot;totalChildMillis&quot; : NumberLong(0),&lt;br/&gt;
&quot;shards&quot; : [&lt;br/&gt;
{&lt;br/&gt;
&quot;shardName&quot; : &quot;shard2&quot;,&lt;br/&gt;
&quot;executionSuccess&quot; : true,&lt;br/&gt;
&quot;nReturned&quot; : 1,&lt;br/&gt;
&quot;executionTimeMillis&quot; : 0,&lt;br/&gt;
&quot;totalKeysExamined&quot; : 1,&lt;br/&gt;
&quot;totalDocsExamined&quot; : 1,&lt;br/&gt;
&quot;executionStages&quot; : {&lt;br/&gt;
&quot;stage&quot; : &quot;PROJECTION_SIMPLE&quot;,&lt;br/&gt;
&quot;nReturned&quot; : 1,&lt;br/&gt;
&quot;executionTimeMillisEstimate&quot; : 0,&lt;br/&gt;
&quot;works&quot; : 2,&lt;br/&gt;
&quot;advanced&quot; : 1,&lt;br/&gt;
&quot;needTime&quot; : 0,&lt;br/&gt;
&quot;needYield&quot; : 0,&lt;br/&gt;
&quot;saveState&quot; : 0,&lt;br/&gt;
&quot;restoreState&quot; : 0,&lt;br/&gt;
&quot;isEOF&quot; : 1,&lt;br/&gt;
&quot;transformBy&quot; :&lt;/p&gt;

{ &quot;no&quot; : 1, &quot;del&quot; : 1, &quot;curT&quot; : 1, &quot;oType&quot; : 1, &quot;matOrg&quot; : 1, &quot;_id&quot; : 0 }
&lt;p&gt;,&lt;br/&gt;
&quot;inputStage&quot; : {&lt;br/&gt;
&quot;stage&quot; : &quot;SHARDING_FILTER&quot;,&lt;br/&gt;
&quot;nReturned&quot; : 1,&lt;br/&gt;
&quot;executionTimeMillisEstimate&quot; : 0,&lt;br/&gt;
&quot;works&quot; : 2,&lt;br/&gt;
&quot;advanced&quot; : 1,&lt;br/&gt;
&quot;needTime&quot; : 0,&lt;br/&gt;
&quot;needYield&quot; : 0,&lt;br/&gt;
&quot;saveState&quot; : 0,&lt;br/&gt;
&quot;restoreState&quot; : 0,&lt;br/&gt;
&quot;isEOF&quot; : 1,&lt;br/&gt;
&quot;chunkSkips&quot; : 0,&lt;br/&gt;
&quot;inputStage&quot; : {&lt;br/&gt;
&quot;stage&quot; : &quot;FETCH&quot;,&lt;br/&gt;
&quot;filter&quot; : {&lt;br/&gt;
&quot;no&quot; :&lt;/p&gt;

{ &quot;$eq&quot; : &quot;YT3224052005840&quot; }
&lt;p&gt;},&lt;br/&gt;
&quot;nReturned&quot; : 1,&lt;br/&gt;
&quot;executionTimeMillisEstimate&quot; : 0,&lt;br/&gt;
&quot;works&quot; : 2,&lt;br/&gt;
&quot;advanced&quot; : 1,&lt;br/&gt;
&quot;needTime&quot; : 0,&lt;br/&gt;
&quot;needYield&quot; : 0,&lt;br/&gt;
&quot;saveState&quot; : 0,&lt;br/&gt;
&quot;restoreState&quot; : 0,&lt;br/&gt;
&quot;isEOF&quot; : 1,&lt;br/&gt;
&quot;docsExamined&quot; : 1,&lt;br/&gt;
&quot;alreadyHasObj&quot; : 0,&lt;br/&gt;
&quot;inputStage&quot; : {&lt;br/&gt;
&quot;stage&quot; : &quot;IXSCAN&quot;,&lt;br/&gt;
&quot;nReturned&quot; : 1,&lt;br/&gt;
&quot;executionTimeMillisEstimate&quot; : 0,&lt;br/&gt;
&quot;works&quot; : 2,&lt;br/&gt;
&quot;advanced&quot; : 1,&lt;br/&gt;
&quot;needTime&quot; : 0,&lt;br/&gt;
&quot;needYield&quot; : 0,&lt;br/&gt;
&quot;saveState&quot; : 0,&lt;br/&gt;
&quot;restoreState&quot; : 0,&lt;br/&gt;
&quot;isEOF&quot; : 1,&lt;br/&gt;
&quot;keyPattern&quot; :&lt;/p&gt;

{ &quot;no&quot; : &quot;hashed&quot; }
&lt;p&gt;,&lt;br/&gt;
&quot;indexName&quot; : &quot;no_hashed&quot;,&lt;br/&gt;
&quot;isMultiKey&quot; : false,&lt;br/&gt;
&quot;isUnique&quot; : false,&lt;br/&gt;
&quot;isSparse&quot; : false,&lt;br/&gt;
&quot;isPartial&quot; : false,&lt;br/&gt;
&quot;indexVersion&quot; : 2,&lt;br/&gt;
&quot;direction&quot; : &quot;forward&quot;,&lt;br/&gt;
&quot;indexBounds&quot; :&lt;/p&gt;

{ &quot;no&quot; : [ &quot;[-857763331883698335, -857763331883698335]&quot; ] }
&lt;p&gt;,&lt;br/&gt;
&quot;keysExamined&quot; : 1,&lt;br/&gt;
&quot;seeks&quot; : 1,&lt;br/&gt;
&quot;dupsTested&quot; : 0,&lt;br/&gt;
&quot;dupsDropped&quot; : 0&lt;br/&gt;
}&lt;br/&gt;
}&lt;br/&gt;
}&lt;br/&gt;
}&lt;br/&gt;
}&lt;br/&gt;
]&lt;br/&gt;
}&lt;br/&gt;
},&lt;br/&gt;
&quot;serverInfo&quot; :&lt;/p&gt;

{ &quot;host&quot; : &quot;srvdb303.yto.cloud&quot;, &quot;port&quot; : 21051, &quot;version&quot; : &quot;4.4.8&quot;, &quot;gitVersion&quot; : &quot;83b8bb8b6b325d8d8d3dfd2ad9f744bdad7d6ca0&quot; }
&lt;p&gt;,&lt;br/&gt;
&quot;ok&quot; : 1,&lt;br/&gt;
&quot;operationTime&quot; : Timestamp(1633958637, 1646),&lt;br/&gt;
&quot;$clusterTime&quot; : {&lt;br/&gt;
&quot;clusterTime&quot; : Timestamp(1633958637, 1649),&lt;br/&gt;
&quot;signature&quot; :&lt;/p&gt;

{ &quot;hash&quot; : BinData(0,&quot;yhztP+fehpQiXUYJNGyv/zitOrc=&quot;), &quot;keyId&quot; : NumberLong(&quot;6958985885933109266&quot;) }
&lt;p&gt;}&lt;br/&gt;
}&lt;/p&gt;</comment>
                    </comments>
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                            <attachment id="352212" name="Screen Shot 2021-12-22 at 11.18.43 AM.png" size="222476" author="edwin.zhou@mongodb.com" created="Wed, 22 Dec 2021 16:22:34 +0000"/>
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