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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-5470] View memorized query optimized plans</title>
                <link>https://jira.mongodb.org/browse/SERVER-5470</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The query optimizer decides on plans to use for certain queries, then memorizes that plan for the next 1,000 queries of that type (unless indexes change etc). &lt;/p&gt;

&lt;p&gt;It would be really useful to have this information visible. It could be a good way of discovering what indices are being used for what queries. It could also then be used to find unused indices.&lt;/p&gt;</description>
                <environment></environment>
        <key id="35194">SERVER-5470</key>
            <summary>View memorized query optimized plans</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="benety.goh@mongodb.com">Benety Goh</assignee>
                                    <reporter username="colinhowe">Colin Howe</reporter>
                        <labels>
                    </labels>
                <created>Sun, 1 Apr 2012 08:47:27 +0000</created>
                <updated>Wed, 28 Oct 2015 04:26:23 +0000</updated>
                            <resolved>Wed, 15 Jan 2014 14:59:08 +0000</resolved>
                                    <version>2.0.4</version>
                                    <fixVersion>2.5.5</fixVersion>
                                    <component>Querying</component>
                                        <votes>2</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="482463" author="xgen-internal-githook" created="Wed, 15 Jan 2014 14:51:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5470&quot; title=&quot;View memorized query optimized plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5470&quot;&gt;&lt;del&gt;SERVER-5470&lt;/del&gt;&lt;/a&gt; updated plan cache commands per updated spec&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/53a4b444ce35f5ac7bef14eccbcff60c0fee3081&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/53a4b444ce35f5ac7bef14eccbcff60c0fee3081&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="480775" author="xgen-internal-githook" created="Mon, 13 Jan 2014 02:22:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5470&quot; title=&quot;View memorized query optimized plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5470&quot;&gt;&lt;del&gt;SERVER-5470&lt;/del&gt;&lt;/a&gt; enable mongos plan cache commands in pass through mode.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e0c69afcf27e690ebb518b4a56e05d4d09e06510&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e0c69afcf27e690ebb518b4a56e05d4d09e06510&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="480175" author="xgen-internal-githook" created="Fri, 10 Jan 2014 15:09:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5470&quot; title=&quot;View memorized query optimized plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5470&quot;&gt;&lt;del&gt;SERVER-5470&lt;/del&gt;&lt;/a&gt; projection support for planCacheGenerateKey command. implemented query plan revision policy for write operations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cd77abcb81b466094d02b747a530b0762e0c82d4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cd77abcb81b466094d02b747a530b0762e0c82d4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="479010" author="xgen-internal-githook" created="Wed, 8 Jan 2014 17:34:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5470&quot; title=&quot;View memorized query optimized plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5470&quot;&gt;&lt;del&gt;SERVER-5470&lt;/del&gt;&lt;/a&gt; extended plan cache to hold all solutons from planning process&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a548f5d0e555166bfef2e99ab52def93f3f1fa16&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a548f5d0e555166bfef2e99ab52def93f3f1fa16&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="478710" author="xgen-internal-githook" created="Wed, 8 Jan 2014 02:19:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5470&quot; title=&quot;View memorized query optimized plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5470&quot;&gt;&lt;del&gt;SERVER-5470&lt;/del&gt;&lt;/a&gt; extended plan cache to hold all solutons from planning process&quot;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f87ff5cb5721eabffaae1ccc4a8dab8098d114fc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f87ff5cb5721eabffaae1ccc4a8dab8098d114fc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="478682" author="xgen-internal-githook" created="Wed, 8 Jan 2014 00:38:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5470&quot; title=&quot;View memorized query optimized plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5470&quot;&gt;&lt;del&gt;SERVER-5470&lt;/del&gt;&lt;/a&gt; extended plan cache to hold all solutons from planning process&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0d818f66f1a2429ce65b19afd9b5e7b64076732b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0d818f66f1a2429ce65b19afd9b5e7b64076732b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="476808" author="xgen-internal-githook" created="Fri, 3 Jan 2014 14:19:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5470&quot; title=&quot;View memorized query optimized plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5470&quot;&gt;&lt;del&gt;SERVER-5470&lt;/del&gt;&lt;/a&gt; plan cache should be retrieved from database not context&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/04221630900335fc6ee0d9922edae9d29f02d66d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/04221630900335fc6ee0d9922edae9d29f02d66d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="476636" author="xgen-internal-githook" created="Thu, 2 Jan 2014 22:00:34 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5470&quot; title=&quot;View memorized query optimized plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5470&quot;&gt;&lt;del&gt;SERVER-5470&lt;/del&gt;&lt;/a&gt; register plan cache commands in a static initializer&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/94aa072feddc099ccd7579a5b41d8d567b86b194&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/94aa072feddc099ccd7579a5b41d8d567b86b194&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="476224" author="xgen-internal-githook" created="Wed, 1 Jan 2014 03:54:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5470&quot; title=&quot;View memorized query optimized plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5470&quot;&gt;&lt;del&gt;SERVER-5470&lt;/del&gt;&lt;/a&gt; added plan cache DB commands&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/de8af0f35153b718307f5a96cd5be255a90e0e8e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/de8af0f35153b718307f5a96cd5be255a90e0e8e&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="67516">SERVER-8871</issuekey>
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            <issuelink>
            <issuekey id="106024">SERVER-12358</issuekey>
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