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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-16413] Storage engines that allow online compaction should not take an exclusive lock</title>
                <link>https://jira.mongodb.org/browse/SERVER-16413</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;WiredTiger allows online compaction, but the storage engine API doesn&apos;t allow using a shared lock on the collection.&lt;/p&gt;</description>
                <environment></environment>
        <key id="172615">SERVER-16413</key>
            <summary>Storage engines that allow online compaction should not take an exclusive lock</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="9">Done</resolution>
                                        <assignee username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</assignee>
                                    <reporter username="dan@mongodb.com">Daniel Pasette</reporter>
                        <labels>
                    </labels>
                <created>Wed, 3 Dec 2014 22:28:03 +0000</created>
                <updated>Tue, 30 Aug 2022 14:39:27 +0000</updated>
                            <resolved>Sat, 22 Jun 2019 00:37:38 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Storage</component>
                    <component>WiredTiger</component>
                                        <votes>5</votes>
                                    <watches>30</watches>
                                                                                                                <comments>
                            <comment id="2293833" author="xgen-internal-githook" created="Sat, 22 Jun 2019 00:37:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16413&quot; title=&quot;Storage engines that allow online compaction should not take an exclusive lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16413&quot;&gt;&lt;del&gt;SERVER-16413&lt;/del&gt;&lt;/a&gt; Storage engines that allow online compaction should not take an exclusive lock&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d4b054976ab484cce590feee49f284c540ce8bc3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d4b054976ab484cce590feee49f284c540ce8bc3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1647253" author="wolf_kdy" created="Mon, 14 Aug 2017 05:53:09 +0000"  >&lt;p&gt;There is a reason strong enough now since mongo-v3.5.10&lt;br/&gt;
the replResizeOplog command is to sizing oplogs online, however, if we use this command to shrink oplog size smalller, wiredtiger won&apos;t purge automaticlly.&lt;br/&gt;
A manual compact to local.oplog.rs is needed but it will block &lt;br/&gt;
It is nice to support this feature and people can change oplog size without blocking reads/writes.&lt;/p&gt;</comment>
                            <comment id="950057" author="michael.cahill" created="Thu, 25 Jun 2015 01:43:04 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=martin.bligh&quot; class=&quot;user-hover&quot; rel=&quot;martin.bligh&quot;&gt;martin.bligh&lt;/a&gt; can we discuss this ticket in the 3.1.6 cycle?  I think the basic code change is pretty straightforward.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=andrew.ryder%4010gen.com&quot; class=&quot;user-hover&quot; rel=&quot;andrew.ryder@10gen.com&quot;&gt;andrew.ryder@10gen.com&lt;/a&gt; points out in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19062&quot; title=&quot;&amp;quot;compact&amp;quot; improvement for WiredTiger&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19062&quot;&gt;&lt;del&gt;SERVER-19062&lt;/del&gt;&lt;/a&gt; that there are user-visible impacts for replication (i.e., if this change is completely transparent, it may not be obvious to an admin whether a compact command will take down a secondary in a mixed replicaset).&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="874134">DOCS-12913</issuekey>
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            <issuekey id="212007">SERVER-19062</issuekey>
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                                        <issuelink>
            <issuekey id="811944">SERVER-41884</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2109913">SERVER-68694</issuekey>
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