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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-10226] Excessive CPU usage for idle tailable cursors</title>
                <link>https://jira.mongodb.org/browse/SERVER-10226</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Tailing a capped collection with await_data is sometimes recommended as a simple pub / sub system. But if no documents are being inserted into the collection, each tailable cursor checks for new documents every 2ms. In my system, this means that 10 subscribers spin the CPU at 36%.&lt;/p&gt;

&lt;p&gt;A better solution would be a condition variable per collection that is notified when documents are inserted.&lt;/p&gt;</description>
                <environment></environment>
        <key id="82490">SERVER-10226</key>
            <summary>Excessive CPU usage for idle tailable cursors</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="3">Duplicate</resolution>
                                        <assignee username="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="jesse@mongodb.com">A. Jesse Jiryu Davis</reporter>
                        <labels>
                    </labels>
                <created>Tue, 16 Jul 2013 20:39:01 +0000</created>
                <updated>Wed, 13 May 2015 20:49:06 +0000</updated>
                            <resolved>Tue, 16 Jul 2013 21:19:16 +0000</resolved>
                                    <version>2.5.0</version>
                                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="382516" author="eliot" created="Tue, 16 Jul 2013 21:19:16 +0000"  >&lt;p&gt;See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9580&quot; title=&quot;Multiple tailable cursors against the same collection shows high cpu usage on server&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9580&quot;&gt;&lt;del&gt;SERVER-9580&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
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