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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-13775] maxTimeMS on an instance/database level</title>
                <link>https://jira.mongodb.org/browse/SERVER-13775</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;MongoDB 2.6 introduced the .maxTimeMS() cursor method, which allows you to specify a max running time for each query. This is awesome for ad-hoc queries, but I wondered if there was a way to set this value on a per-instance or per-database (or even per-collection) level, to try and prevent locking in general.&lt;/p&gt;

&lt;p&gt;And if so, could that value then be OVERWRITTEN on a per-query basis? I would love to set an instance level timeout of 3000ms or thereabouts (since that would be a pretty extreme running time for queries issued by my application), but then be able to ignore it if I had a report to run.&lt;/p&gt;</description>
                <environment></environment>
        <key id="133766">SERVER-13775</key>
            <summary>maxTimeMS on an instance/database level</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="fordjp@gmail.com">Jason Ford</reporter>
                        <labels>
                            <label>maxTimeMs</label>
                            <label>performance</label>
                    </labels>
                <created>Mon, 28 Apr 2014 18:54:32 +0000</created>
                <updated>Wed, 30 Aug 2023 03:49:10 +0000</updated>
                                            <version>2.6.0</version>
                                                    <component>Admin</component>
                    <component>Stability</component>
                                        <votes>25</votes>
                                    <watches>45</watches>
                                                                                                                <comments>
                            <comment id="803616" author="asya" created="Tue, 13 Jan 2015 19:22:16 +0000"  >&lt;p&gt;Currently this can be simulated by a script running on the server (or just connecting to the server) which periodically queries for all current operations on a particular namespace running longer than certain amount of time, being careful to exclude operations that don&apos;t come from the client (not mongod internal or replication or sharding related operations) and then kills them.   &lt;/p&gt;

&lt;p&gt;The docs have examples starting here:&lt;br/&gt;
&lt;a href=&quot;http://docs.mongodb.org/manual/reference/method/db.currentOp/#write-operations-waiting-for-a-lock&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/reference/method/db.currentOp/#write-operations-waiting-for-a-lock&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;You want something like &lt;tt&gt;db.currentOp({secs_running:{$gt:1}, ns:&quot;theNameSpace&quot;})&lt;/tt&gt; (with other conditions there) to identify ops to kill.&lt;/p&gt;

&lt;p&gt;Starting with upcoming 2.8 there is a &quot;microsecs_running&quot; field in addition to &quot;secs_running&quot;&lt;/p&gt;</comment>
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