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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-46865] collMod should not take database MODE_X lock</title>
                <link>https://jira.mongodb.org/browse/SERVER-46865</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Because of ancient MMAPv1 storage engine heritage, the &lt;tt&gt;collMod&lt;/tt&gt; command still locks the database using a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/69c511dcd726d4aba961df704981b62b9b297121/src/mongo/db/catalog/coll_mod.cpp#L275&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;MODE_X&lt;/tt&gt; lock&lt;/a&gt;.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="1272580">SERVER-46865</key>
            <summary>collMod should not take database MODE_X 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="13201">Fixed</resolution>
                                        <assignee username="gregory.noma@mongodb.com">Gregory Noma</assignee>
                                    <reporter username="geert.bosch@mongodb.com">Geert Bosch</reporter>
                        <labels>
                    </labels>
                <created>Fri, 13 Mar 2020 20:18:05 +0000</created>
                <updated>Sun, 29 Oct 2023 22:10:47 +0000</updated>
                            <resolved>Wed, 1 Apr 2020 22:29:29 +0000</resolved>
                                                    <fixVersion>4.2.6</fixVersion>
                    <fixVersion>4.4.0-rc0</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                    <component>Catalog</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3024982" author="xgen-internal-githook" created="Fri, 3 Apr 2020 14:05:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;, &apos;username&apos;: &apos;gregorynoma&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46865&quot; title=&quot;collMod should not take database MODE_X lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46865&quot;&gt;&lt;del&gt;SERVER-46865&lt;/del&gt;&lt;/a&gt; Make collMod not take database MODE_X lock&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 616780c320e7da17e7d1425cea5b13a56cccfd4d)&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4be21a34f7130d4756d04f919f87f41da5b90c39&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4be21a34f7130d4756d04f919f87f41da5b90c39&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3023566" author="gregory.noma" created="Thu, 2 Apr 2020 17:09:53 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=xiaoqiang.chou%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;xiaoqiang.chou@gmail.com&quot;&gt;xiaoqiang.chou@gmail.com&lt;/a&gt; Glad to hear that it helped with your collMod performance! It was reverted temporarily due to a test failure that it caused, but it&apos;s back in now!&lt;/p&gt;</comment>
                            <comment id="3023223" author="xgen-internal-githook" created="Thu, 2 Apr 2020 14:59:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;, &apos;username&apos;: &apos;gregorynoma&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46865&quot; title=&quot;collMod should not take database MODE_X lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46865&quot;&gt;&lt;del&gt;SERVER-46865&lt;/del&gt;&lt;/a&gt; Make collMod not take database MODE_X lock&lt;/p&gt;

&lt;p&gt;(cherry picked from commit e2e5505c2975bfd8a355229c8e85cd0c560d3a0e)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/848c60bcb8257981615bbb0e29894da5f7f912ec&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/848c60bcb8257981615bbb0e29894da5f7f912ec&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3022089" author="xgen-internal-githook" created="Wed, 1 Apr 2020 22:29:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;, &apos;username&apos;: &apos;gregorynoma&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46865&quot; title=&quot;collMod should not take database MODE_X lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46865&quot;&gt;&lt;del&gt;SERVER-46865&lt;/del&gt;&lt;/a&gt; Make collMod not take database MODE_X lock&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/616780c320e7da17e7d1425cea5b13a56cccfd4d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/616780c320e7da17e7d1425cea5b13a56cccfd4d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3020442" author="xiaoqiang.chou@gmail.com" created="Wed, 1 Apr 2020 03:43:22 +0000"  >&lt;p&gt;Why is commit &quot;80ebcc52a6ec27834a286ab1ab342db0d7f63756&quot; reverted?&lt;/p&gt;

&lt;p&gt;It did make collMod (update view) a lot faster. createView remains slow though&lt;/p&gt;</comment>
                            <comment id="3013213" author="xgen-internal-githook" created="Mon, 30 Mar 2020 16:38:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;, &apos;username&apos;: &apos;gregorynoma&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46865&quot; title=&quot;collMod should not take database MODE_X lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46865&quot;&gt;&lt;del&gt;SERVER-46865&lt;/del&gt;&lt;/a&gt; Make collMod not take database MODE_X lock&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 80ebcc52a6ec27834a286ab1ab342db0d7f63756.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d92d49a727a3ad8a69e2abcc28ab14364abff17a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d92d49a727a3ad8a69e2abcc28ab14364abff17a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2994379" author="xgen-internal-githook" created="Tue, 24 Mar 2020 15:59:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;username&apos;: &apos;gregorynoma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46865&quot; title=&quot;collMod should not take database MODE_X lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46865&quot;&gt;&lt;del&gt;SERVER-46865&lt;/del&gt;&lt;/a&gt; Make collMod not take database MODE_X lock&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/80ebcc52a6ec27834a286ab1ab342db0d7f63756&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/80ebcc52a6ec27834a286ab1ab342db0d7f63756&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1274373">SERVER-46874</issuekey>
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            <issuekey id="1886299">SERVER-60312</issuekey>
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                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1294471">SERVER-47162</issuekey>
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            <issuekey id="2303858">DOCS-15998</issuekey>
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