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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-50491] Frequent schema changes due to freeStorageSize limit FTDC retention</title>
                <link>https://jira.mongodb.org/browse/SERVER-50491</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42037&quot; title=&quot;Expose WiredTiger block-manager stats with scale support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42037&quot;&gt;&lt;del&gt;SERVER-42037&lt;/del&gt;&lt;/a&gt; we introduced a freeStorageSize metric that reports the amount of bytes available for reuse in the oplog table. But this value is only appended to serverStatus if it is non-zero, which creates frequent schema changes in the case where the oplog table has only a small amount of free space. In one test back-of-the-envelope calculation indicates this was cutting FTDC retention in half. The value should be included in serverStatus even if it&apos;s 0.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1450450">SERVER-50491</key>
            <summary>Frequent schema changes due to freeStorageSize limit FTDC retention</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="13201">Fixed</resolution>
                                        <assignee username="gregory.noma@mongodb.com">Gregory Noma</assignee>
                                    <reporter username="bruce.lucas@mongodb.com">Bruce Lucas</reporter>
                        <labels>
                    </labels>
                <created>Mon, 24 Aug 2020 16:46:01 +0000</created>
                <updated>Sun, 29 Oct 2023 22:04:05 +0000</updated>
                            <resolved>Tue, 22 Sep 2020 14:19:13 +0000</resolved>
                                    <version>4.4.0</version>
                                    <fixVersion>4.8.0</fixVersion>
                    <fixVersion>4.4.2</fixVersion>
                                    <component>Diagnostics</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="3408164" author="bruce.lucas@10gen.com" created="Wed, 23 Sep 2020 18:55:20 +0000"  >&lt;p&gt;Thanks for the fix and the backport.&lt;/p&gt;</comment>
                            <comment id="3406213" author="xgen-internal-githook" created="Tue, 22 Sep 2020 22:08:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;, &apos;username&apos;: &apos;gregorynoma&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50491&quot; title=&quot;Frequent schema changes due to freeStorageSize limit FTDC retention&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50491&quot;&gt;&lt;del&gt;SERVER-50491&lt;/del&gt;&lt;/a&gt; Include freeStorageSize in serverStatus even when zero&lt;/p&gt;

&lt;p&gt;(cherry picked from commit f0b9672357e87aa50db46e2da16ed084627c5644)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f2fab88cd3f4843dd01abd18e38379a2d402f0d3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f2fab88cd3f4843dd01abd18e38379a2d402f0d3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3405160" author="xgen-internal-githook" created="Tue, 22 Sep 2020 14:07:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;, &apos;username&apos;: &apos;gregorynoma&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50491&quot; title=&quot;Frequent schema changes due to freeStorageSize limit FTDC retention&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50491&quot;&gt;&lt;del&gt;SERVER-50491&lt;/del&gt;&lt;/a&gt; Include freeStorageSize in serverStatus even when zero&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f0b9672357e87aa50db46e2da16ed084627c5644&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f0b9672357e87aa50db46e2da16ed084627c5644&lt;/a&gt;&lt;/p&gt;</comment>
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