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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>[DOCS-10992] convertToCapped is missing the &apos;global write lock&apos; warning</title>
                <link>https://jira.mongodb.org/browse/DOCS-10992</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;&lt;a href=&quot;http://docs.mongodb.org/manual/reference/command/convertToCapped/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/reference/command/convertToCapped/&lt;/a&gt; does not mention that the command acquires a global write lock on the server, with all the dire consequences this can have on a live instance.&lt;br/&gt;
The guide about &lt;a href=&quot;https://docs.mongodb.com/v3.4/core/capped-collections/#convert-a-collection-to-capped&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&quot;Converting a collection to capped&quot;&lt;/a&gt; does mention it.&lt;/p&gt;

&lt;p&gt;It appears the mention was removed in &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-4502&quot; title=&quot;Remove &amp;#39;global write lock&amp;#39; mention from convertToCapped page&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-4502&quot;&gt;&lt;del&gt;DOCS-4502&lt;/del&gt;&lt;/a&gt; allegedly because &quot;This is no longer true in 2.8 due to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15826&quot; title=&quot;ConvertToCapped appears to be taking a G_X lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15826&quot;&gt;&lt;del&gt;SERVER-15826&lt;/del&gt;&lt;/a&gt;&quot; back in 2014.&lt;br/&gt;
I assume there was some confusion, as I found no evidence of the lock being actually removed, though it does switch to a DB lock in some cases after &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15723&quot; title=&quot;Avoid G_X lock for rename_collection within database&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15723&quot;&gt;&lt;del&gt;SERVER-15723&lt;/del&gt;&lt;/a&gt; -&#160;a very recent change (3.4.10/3.5.10).&lt;/p&gt;

&lt;p&gt;If that report is confirmed, might a revert of &lt;a href=&quot;https://github.com/mongodb/docs/commit/72f694eb8f2ce9e5cdcd97f24dbaa7fa360a64c2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;mongodb/docs 72f694e&lt;/tt&gt;&lt;/a&gt; be enough?&lt;/p&gt;</description>
                <environment></environment>
        <key id="455985">DOCS-10992</key>
            <summary>convertToCapped is missing the &apos;global write lock&apos; warning</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="kevin.albertson@mongodb.com">Kevin Albertson</assignee>
                                    <reporter username="asiebert">Adrien Siebert</reporter>
                        <labels>
                    </labels>
                <created>Tue, 7 Nov 2017 18:44:03 +0000</created>
                <updated>Mon, 30 Oct 2023 21:04:33 +0000</updated>
                            <resolved>Mon, 20 Nov 2017 22:04:47 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1731046" author="xgen-internal-githook" created="Mon, 20 Nov 2017 22:03:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kevin Albertson&apos;, &apos;username&apos;: &apos;kevinAlbs&apos;, &apos;email&apos;: &apos;kevin.albertson@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-10992&quot; title=&quot;convertToCapped is missing the &amp;#39;global write lock&amp;#39; warning&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-10992&quot;&gt;&lt;del&gt;DOCS-10992&lt;/del&gt;&lt;/a&gt; capped commands take DB_X locks&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/9b1f13cfa5edab3a68cc574b3f3b768d9131026a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/9b1f13cfa5edab3a68cc574b3f3b768d9131026a&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="174040">DOCS-4502</issuekey>
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            <issuekey id="164398">SERVER-15723</issuekey>
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