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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-34559] Explore options for capped collection performance improvements</title>
                <link>https://jira.mongodb.org/browse/SERVER-34559</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;At the moment capped collections generally end up removing a small number of documents at a time when they reach the capped size.&lt;/p&gt;

&lt;p&gt;We had success with optmizing how the oplog maintains it&apos;s size, by removing a larger volume of entries at a time. We could make capped collections much faster by making a similar change, and removing a proportion of the documents to maintain the collection size.&lt;/p&gt;

&lt;p&gt;There are &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/storage/wiredtiger/wiredtiger_record_store.cpp#L891&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;references in the code&lt;/a&gt; to count based capped collections requiring, but our &lt;a href=&quot;https://docs.mongodb.com/manual/core/capped-collections/#create-a-capped-collection&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;documentation&lt;/a&gt; doesn&apos;t mention that requirement, in fact it says that the size restriction means we don&apos;t guarantee that the count will be accurately maintained.&lt;/p&gt;</description>
                <environment></environment>
        <key id="530736">SERVER-34559</key>
            <summary>Explore options for capped collection performance improvements</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-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="alexander.gorrod@mongodb.com">Alexander Gorrod</reporter>
                        <labels>
                    </labels>
                <created>Thu, 19 Apr 2018 01:12:17 +0000</created>
                <updated>Mon, 5 Dec 2022 20:29:10 +0000</updated>
                                                                            <component>Storage</component>
                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="4319269" author="connie.chen" created="Thu, 27 Jan 2022 19:47:05 +0000"  >&lt;p&gt;Putting this back into Triage as we are closing PM-223 as we are no-longer deprecating capped collections&lt;/p&gt;</comment>
                            <comment id="1888868" author="alexander.gorrod" created="Fri, 11 May 2018 06:23:03 +0000"  >&lt;p&gt;Capped collections are not a preferred method for maintaining a bounded collection (use TTL indexes), so I&apos;m moving this optimization ticket to the backlog.&lt;/p&gt;</comment>
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            <issuekey id="1994229">SERVER-64186</issuekey>
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