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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-14733] How to check which sql statement is causing global lock</title>
                <link>https://jira.mongodb.org/browse/SERVER-14733</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We are monitoring MongoDB using MMS and getting global lock for 10-15 sec alert. I like to see which sql is causing this global lock. I have checked all the sql in log file, but can&apos;t find any sql which is taking so long.&lt;/p&gt;</description>
                <environment></environment>
        <key id="150091">SERVER-14733</key>
            <summary>How to check which sql statement is causing global lock</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="stephen.steneker@mongodb.com">Stennie Steneker</assignee>
                                    <reporter username="sarbamangal">Sarbamangal Choudhury</reporter>
                        <labels>
                    </labels>
                <created>Wed, 30 Jul 2014 19:11:32 +0000</created>
                <updated>Wed, 10 Dec 2014 23:11:44 +0000</updated>
                            <resolved>Thu, 31 Jul 2014 08:35:41 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="677323" author="stennie" created="Thu, 31 Jul 2014 08:35:41 +0000"  >&lt;p&gt;Hi Sarbamangal,&lt;/p&gt;

&lt;p&gt;The SERVER project is intended to be used for reporting bugs or feature suggestions for the MongoDB server.&lt;/p&gt;

&lt;p&gt;In future, please post MongoDB-related support questions like this on the mongodb-users group (&lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://groups.google.com/group/mongodb-user&lt;/a&gt;) or Stack Overflow / ServerFault. MongoDB team members are active in these forums, and you can also benefit from the experience of other MongoDB users.&lt;/p&gt;

&lt;p&gt;If you have configured an alert based on lock percentage in MMS you also need to consider an appropriate threshold &amp;#8211; lock % does not necessarily indicate a performance problem, and will occur as a result of normal write activity. You need to look at other possible correlations in MMS such as the opcounters, queues, background flush, page faults, and I/O at the time.&lt;/p&gt;

&lt;p&gt;Some further resources that may help:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;&lt;a href=&quot;http://blog.mms.mongodb.com/post/78650784046/learn-about-lock-percentage-concurrency-in-mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Lock Percentage in MMS&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;&lt;a href=&quot;http://www.mongodb.com/blog/post/five-mms-monitoring-alerts-keep-your-mongodb-deployment-track&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Five MMS Monitoring Alerts to Keep Your MongoDB Deployment on Track&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;The &lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/manage-the-database-profiler/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MongoDB Query profiler&lt;/a&gt; can be enabled on a per-database level to help you track down slow queries. Slow queries are also included in the mongod log.&lt;/li&gt;
&lt;/ul&gt;


&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;A recent presentation on &lt;a href=&quot;http://www.mongodb.com/presentations/webinar-diagnostics-and-debugging-mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Diagnostics &amp;amp; Debugging&lt;/a&gt; provides some helpful insight into troubleshooting, and in particular doing log-based analysis using &lt;a href=&quot;https://github.com/rueckstiess/mtools&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mtools&lt;/a&gt;.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Regards,&lt;br/&gt;
Stephen&lt;/p&gt;</comment>
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