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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-66655] Update Storage Execution Arch Guide with new TTL Behavior</title>
                <link>https://jira.mongodb.org/browse/SERVER-66655</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;With batched deletes, we&apos;ve introduced the concept of &apos;fairness&apos; for the TTL monitor as follows:&lt;/p&gt;


&lt;ul&gt;
	&lt;li&gt;A TTL pass deletes all documents whose TTL value is expired.&lt;/li&gt;
	&lt;li&gt;If the TTL monitor batches deletes (ttlMonitorBatchDeletes server param), then it provides fair TTL deletion as below.&lt;/li&gt;
	&lt;li&gt;The TTL pass consists of one or more subpasses.
	&lt;ul&gt;
		&lt;li&gt;Each subpass deletes all expired documents on each TTL index in a round-robin fashion.&lt;/li&gt;
		&lt;li&gt;The delete on each TTL index removes up to ttlIndexDeleteTargetDocs or runs up to ttlIndexDeleteTargetTimeMS, whichever happens first. The same TTL index can be queued up to be revisited in the same subpass if there are outstanding deletions.&lt;/li&gt;
		&lt;li&gt;A TTL index is not visited any longer in a subpass once all documents are deleted.&lt;/li&gt;
		&lt;li&gt;The duration of a subpass is limited to ttlMonitorSubPassTargetSecs. If there are outstanding deletions by the end of the subpass, a new subpass starts within the same pass.&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2052589">SERVER-66655</key>
            <summary>Update Storage Execution Arch Guide with new TTL Behavior</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="haley.connelly@mongodb.com">Haley Connelly</assignee>
                                    <reporter username="haley.connelly@mongodb.com">Haley Connelly</reporter>
                        <labels>
                            <label>PM-2227-M3</label>
                    </labels>
                <created>Mon, 23 May 2022 13:05:22 +0000</created>
                <updated>Sun, 29 Oct 2023 21:37:56 +0000</updated>
                            <resolved>Tue, 7 Jun 2022 09:04:55 +0000</resolved>
                                                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4590179" author="xgen-internal-githook" created="Thu, 2 Jun 2022 15:29:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Haley Connelly&apos;, &apos;email&apos;: &apos;haley.connelly@mongodb.com&apos;, &apos;username&apos;: &apos;haleyConnelly&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66655&quot; title=&quot;Update Storage Execution Arch Guide with new TTL Behavior&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66655&quot;&gt;&lt;del&gt;SERVER-66655&lt;/del&gt;&lt;/a&gt; Add TTLMonitor to architecture guide&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/44dc2fdbf1df6c61edcc4faba7e336ead0a59ec2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/44dc2fdbf1df6c61edcc4faba7e336ead0a59ec2&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2058780">SERVER-66898</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1683953">SERVER-56194</issuekey>
        </issuelink>
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