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    <title>MongoDB Jira</title>
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    <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-15025] Disk usage increases linearly with constant data size, large churn, usePowerOf2Sizes and large document sizes</title>
                <link>https://jira.mongodb.org/browse/SERVER-15025</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;MongoDB will erroneously allocate new space at essentially a constant rate  for the following:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;An insert/delete only workload&lt;/li&gt;
	&lt;li&gt;usePowerOf2Sizes used&lt;/li&gt;
	&lt;li&gt;essentially constant, at least bounded data size&lt;/li&gt;
	&lt;li&gt;Documents greater than 2MB.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;A common use case where this applies is where a collection represents, for example, the last 48 hours of some data. Over the 48 hours data is constantly inserted, at some point old data is deleted in bulk.&lt;/p&gt;

&lt;p&gt;This results in a constant data size resulting in a linearly increasing database on disk.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="154607">SERVER-15025</key>
            <summary>Disk usage increases linearly with constant data size, large churn, usePowerOf2Sizes and large document sizes</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="-1">Unassigned</assignee>
                                    <reporter username="alan.spencer">Alan Spencer</reporter>
                        <labels>
                    </labels>
                <created>Mon, 25 Aug 2014 16:25:30 +0000</created>
                <updated>Wed, 10 Dec 2014 23:04:27 +0000</updated>
                            <resolved>Tue, 26 Aug 2014 04:06:57 +0000</resolved>
                                    <version>2.4.6</version>
                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="704068" author="alan.spencer" created="Tue, 26 Aug 2014 14:04:48 +0000"  >&lt;p&gt;Just to ensure this doesn&apos;t get lots in duplicate tagging - this issue is for 2.4.6 - not 2.6 with the limited scanning of MAX_BUCKET, it is not caused by that change (though on 2.6 is it extremely exaggerated)&lt;/p&gt;

&lt;p&gt;Should we leave this open as 2.4 specific?&lt;/p&gt;</comment>
                            <comment id="703582" author="eliot" created="Tue, 26 Aug 2014 04:06:49 +0000"  >&lt;p&gt;Its actually a dup of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-14088&quot; title=&quot;Excessive DB fileSize growth for large documents and powerOf2&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-14088&quot;&gt;&lt;del&gt;SERVER-14088&lt;/del&gt;&lt;/a&gt;, which is different than 2958.&lt;/p&gt;</comment>
                            <comment id="702744" author="scotthernandez" created="Mon, 25 Aug 2014 16:37:20 +0000"  >&lt;p&gt;How is this not a duplicate of  &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2958&quot; title=&quot;Freelist algorithm causes storage fragmentation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2958&quot;&gt;&lt;del&gt;SERVER-2958&lt;/del&gt;&lt;/a&gt; ?&lt;/p&gt;</comment>
                            <comment id="702727" author="alan.spencer" created="Mon, 25 Aug 2014 16:27:22 +0000"  >&lt;p&gt;Reproduction script&lt;/p&gt;</comment>
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