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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>
    </build-info>


<item>
            <title>[SERVER-6700] Allow updates to expireAfterSeconds field for TTL indexes</title>
                <link>https://jira.mongodb.org/browse/SERVER-6700</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This can be accomplished using the collMod command. The syntax for changing the value of the expireAfterSeconds field is:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.runCommand( {&quot;collMod&quot; : [collection] , &quot;index&quot; : { &quot;keyPattern&quot; : [indexPattern] , &quot;expireAfterSeconds&quot; : [newVal] } } )&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
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&lt;p/&gt;
&lt;p&gt;For instance:&lt;/p&gt;
&lt;p/&gt;
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&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.runCommand( {&quot;collMod&quot; : &quot;foo&quot; , &quot;index&quot; : { &quot;keyPattern&quot; : {a : 1} , &quot;expireAfterSeconds&quot; : 3600 } } )&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/table&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="46146">SERVER-6700</key>
            <summary>Allow updates to expireAfterSeconds field for TTL indexes</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="matulef">Kevin Matulef</assignee>
                                    <reporter username="matulef">Kevin Matulef</reporter>
                        <labels>
                    </labels>
                <created>Fri, 3 Aug 2012 07:21:00 +0000</created>
                <updated>Tue, 16 Nov 2021 13:26:43 +0000</updated>
                            <resolved>Mon, 24 Dec 2012 22:33:53 +0000</resolved>
                                    <version>2.1.2</version>
                                    <fixVersion>2.3.2</fixVersion>
                                    <component>Index Maintenance</component>
                    <component>Usability</component>
                                        <votes>4</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="234411" author="auto" created="Tue, 8 Jan 2013 20:04:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-01-08T19:49:45Z&apos;, u&apos;email&apos;: u&apos;tad@10gen.com&apos;, u&apos;name&apos;: u&apos;Tad Marshall&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6700&quot; title=&quot;Allow updates to expireAfterSeconds field for TTL indexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6700&quot;&gt;&lt;del&gt;SERVER-6700&lt;/del&gt;&lt;/a&gt; Remove race in part 3 of test&lt;/p&gt;

&lt;p&gt;Wait for replication before checking secondary in part 3.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e703648398e5e6df847483422bb56b5523b62595&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e703648398e5e6df847483422bb56b5523b62595&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="223649" author="auto" created="Tue, 25 Dec 2012 01:11:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-12-25T01:11:05Z&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6700&quot; title=&quot;Allow updates to expireAfterSeconds field for TTL indexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6700&quot;&gt;&lt;del&gt;SERVER-6700&lt;/del&gt;&lt;/a&gt; fix test&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5f453739cc2d4f17341395115a2d27cda5894f38&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5f453739cc2d4f17341395115a2d27cda5894f38&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="223586" author="matulef" created="Mon, 24 Dec 2012 22:33:54 +0000"  >&lt;p&gt;This can now be accomplished using the collMod command. The syntax for changing the value of the expireAfterSeconds field is:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.runCommand( {&quot;collMod&quot; : [collection] , &quot;index&quot; : { &quot;keyPattern&quot; : [indexPattern] , &quot;expireAfterSeconds&quot; : [newVal] } } )&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;For instance:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.runCommand( {&quot;collMod&quot; : &quot;foo&quot; , &quot;index&quot; : { &quot;keyPattern&quot; : {a : 1} , &quot;expireAfterSeconds&quot; : 3600 } } )&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="223584" author="auto" created="Mon, 24 Dec 2012 22:30:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-12-24T22:30:16Z&apos;, u&apos;email&apos;: u&apos;matulef@gmail.com&apos;, u&apos;name&apos;: u&apos;Kevin Matulef&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6700&quot; title=&quot;Allow updates to expireAfterSeconds field for TTL indexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6700&quot;&gt;&lt;del&gt;SERVER-6700&lt;/del&gt;&lt;/a&gt; allow updates to TTL expiration time using collMod&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a3a5fd617cc9bc7df0083c60094ec6d804ddba3a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a3a5fd617cc9bc7df0083c60094ec6d804ddba3a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="167481" author="matulef" created="Mon, 24 Sep 2012 19:41:52 +0000"  >&lt;p&gt;This is a simple theoretical change, but a bit trickier to implement than it sounds.  &lt;/p&gt;

&lt;p&gt;For the time being, a workaround is to declare a normal (non-TTL) index on the time-based field you want to use, then use the collMod command to change the memory allocation scheme for the collection: &lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.runCommand( {&quot;collMod&quot; : [collection] , &quot;usePowerOf2Sizes&quot; : true } )&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;and finally write your own external script that simulates the TTL monitor by deleting old docs every 60 seconds or so.  It&apos;s not the most elegant solution, but it may be preferable if you frequently change your definition of &quot;old.&quot;&lt;/p&gt;</comment>
                            <comment id="167431" author="david@blabbings.com" created="Mon, 24 Sep 2012 18:14:16 +0000"  >&lt;p&gt;This would be huge for us. We are just having to do this week against a very large dataset. TTL has been a critical and great feature for us in our analytics to handle sliding windows.&lt;/p&gt;</comment>
                            <comment id="167417" author="eldar" created="Mon, 24 Sep 2012 17:36:50 +0000"  >&lt;p&gt;+1&lt;/p&gt;</comment>
                            <comment id="167376" author="david@blabbings.com" created="Mon, 24 Sep 2012 16:02:23 +0000"  >&lt;p&gt;1++&lt;/p&gt;</comment>
                            <comment id="160899" author="narayavc" created="Wed, 5 Sep 2012 22:02:39 +0000"  >&lt;p&gt;+1&lt;/p&gt;</comment>
                    </comments>
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                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="63286">DOCS-1044</issuekey>
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                            <issuelinktype id="10012">
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                                        <issuelink>
            <issuekey id="10397">SERVER-211</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="46147">SERVER-6701</issuekey>
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