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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-5667] convertToCapped drops all indexes</title>
                <link>https://jira.mongodb.org/browse/SERVER-5667</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi,&lt;/p&gt;

&lt;p&gt;It looks like convertToCapped doesn&apos;t recreate indexes on the collection.  I&apos;m not sure whether or not it&apos;s intended behavior but if it&apos;s not a bug it would be nice if the documentation could be updated to reflect the need to recreate indexes.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://www.mongodb.org/display/DOCS/Capped+Collections#CappedCollections-Convertingacollectiontocapped&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.mongodb.org/display/DOCS/Capped+Collections#CappedCollections-Convertingacollectiontocapped&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Thanks.&lt;/p&gt;

&lt;p&gt;Steps to replicate:&lt;/p&gt;

&lt;p&gt;U:Jeffs-MacBook-Air.local&amp;gt; db.foodle.save(&lt;/p&gt;
{ id:1, ts:new Date()}
&lt;p&gt;)&lt;br/&gt;
U:Jeffs-MacBook-Air.local&amp;gt; db.foodle.ensureIndex(&lt;/p&gt;
{ ts:1 }
&lt;p&gt;)&lt;br/&gt;
U:Jeffs-MacBook-Air.local&amp;gt; db.foodle.stats()&lt;br/&gt;
{&lt;br/&gt;
	&quot;ns&quot; : &quot;test.foodle&quot;,&lt;br/&gt;
	&quot;count&quot; : 1,&lt;br/&gt;
	&quot;size&quot; : 48,&lt;br/&gt;
	&quot;avgObjSize&quot; : 48,&lt;br/&gt;
	&quot;storageSize&quot; : 4096,&lt;br/&gt;
	&quot;numExtents&quot; : 1,&lt;br/&gt;
	&quot;nindexes&quot; : 2,&lt;br/&gt;
	&quot;lastExtentSize&quot; : 4096,&lt;br/&gt;
	&quot;paddingFactor&quot; : 1,&lt;br/&gt;
	&quot;flags&quot; : 1,&lt;br/&gt;
	&quot;totalIndexSize&quot; : 16352,&lt;br/&gt;
	&quot;indexSizes&quot; : &lt;/p&gt;
{
		&quot;_id_&quot; : 8176,
		&quot;ts_1&quot; : 8176
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;ok&quot; : 1&lt;br/&gt;
}&lt;br/&gt;
U:Jeffs-MacBook-Air.local&amp;gt; db.runCommand(&lt;/p&gt;
{ &quot;convertToCapped&quot;:&quot;foodle&quot;, size:100 }
&lt;p&gt;)&lt;/p&gt;
{ &quot;ok&quot; : 1 }
&lt;p&gt;U:Jeffs-MacBook-Air.local&amp;gt; db.foodle.stats()&lt;br/&gt;
{&lt;br/&gt;
	&quot;ns&quot; : &quot;test.foodle&quot;,&lt;br/&gt;
	&quot;count&quot; : 1,&lt;br/&gt;
	&quot;size&quot; : 48,&lt;br/&gt;
	&quot;avgObjSize&quot; : 48,&lt;br/&gt;
	&quot;storageSize&quot; : 4096,&lt;br/&gt;
	&quot;numExtents&quot; : 1,&lt;br/&gt;
	&quot;nindexes&quot; : 0,&lt;br/&gt;
	&quot;lastExtentSize&quot; : 4096,&lt;br/&gt;
	&quot;paddingFactor&quot; : 1,&lt;br/&gt;
	&quot;flags&quot; : 0,&lt;br/&gt;
	&quot;totalIndexSize&quot; : 0,&lt;br/&gt;
	&quot;indexSizes&quot; : {&lt;/p&gt;

&lt;p&gt;	},&lt;br/&gt;
	&quot;capped&quot; : 1,&lt;br/&gt;
	&quot;max&quot; : 2147483647,&lt;br/&gt;
	&quot;ok&quot; : 1&lt;br/&gt;
}&lt;/p&gt;</description>
                <environment>Linux</environment>
        <key id="36815">SERVER-5667</key>
            <summary>convertToCapped drops all indexes</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="9">Done</resolution>
                                        <assignee username="scotthernandez">Scott Hernandez</assignee>
                                    <reporter username="jlee">Jeff lee</reporter>
                        <labels>
                    </labels>
                <created>Fri, 20 Apr 2012 19:36:09 +0000</created>
                <updated>Wed, 15 Aug 2012 14:24:07 +0000</updated>
                            <resolved>Fri, 20 Apr 2012 19:58:27 +0000</resolved>
                                    <version>2.0.4</version>
                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="128221" author="auto" created="Thu, 7 Jun 2012 21:23:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;tychoish&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5667&quot; title=&quot;convertToCapped drops all indexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5667&quot;&gt;&lt;del&gt;SERVER-5667&lt;/del&gt;&lt;/a&gt; convertToCapped index creation clarification&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/5806056a69d28e848b5dafee025df453a6f26a40&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/5806056a69d28e848b5dafee025df453a6f26a40&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="112112" author="scotthernandez" created="Fri, 20 Apr 2012 19:58:27 +0000"  >&lt;p&gt;Yes, that is by design. I will update the docs to make it clear.&lt;/p&gt;</comment>
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