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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>[DOCS-2920] Comment on db.upgradeCheck() and db.upgradeCheckAllDbs()</title>
                <link>https://jira.mongodb.org/browse/DOCS-2920</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;&lt;a href=&quot;http://docs.mongodb.org/master/reference/method/db.upgradeCheck/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/master/reference/method/db.upgradeCheck/&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;http://docs.mongodb.org/master/reference/method/db.upgradeCheckAllDbs/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/master/reference/method/db.upgradeCheckAllDbs/&lt;/a&gt;&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;Clarify the performance impact to run db.upgradeCheck() and db.upgradeCheckAllDbs()&lt;br/&gt;
db.upgradeCheck() and db.upgradeCheckAllDbs() validates all the document in the given collections. This looks like a collection scan, and might affect the  performance on a production environment. If it is true, can you add this  warning in the document?&lt;/li&gt;
	&lt;li&gt;If it is a sharded cluster/replica set, it would be nice to document which nodes we should run db.upgradeCheck() or db.upgradeCheckAllDbs().&lt;/li&gt;
&lt;/ol&gt;
</description>
                <environment></environment>
        <key id="121489">DOCS-2920</key>
            <summary>Comment on db.upgradeCheck() and db.upgradeCheckAllDbs()</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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="linda.qin@mongodb.com">Linda Qin</reporter>
                        <labels>
                    </labels>
                <created>Mon, 17 Mar 2014 00:55:49 +0000</created>
                <updated>Thu, 20 Mar 2014 19:32:39 +0000</updated>
                            <resolved>Thu, 20 Mar 2014 19:32:32 +0000</resolved>
                                                    <fixVersion>v1.3.2</fixVersion>
                    <fixVersion>mongodb-2.6</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="520266" author="xgen-internal-githook" created="Thu, 20 Mar 2014 19:32:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2920&quot; title=&quot;Comment on db.upgradeCheck() and db.upgradeCheckAllDbs()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2920&quot;&gt;&lt;del&gt;DOCS-2920&lt;/del&gt;&lt;/a&gt; specify nodes to run against and access info&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/130cf6321f38d4229130d17fb0c9ac67e976cb87&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/130cf6321f38d4229130d17fb0c9ac67e976cb87&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="518467" author="mattd@10gen.com" created="Tue, 18 Mar 2014 17:09:39 +0000"  >&lt;p&gt;1. It does do collection scans and it is worth adding a warning about that.&lt;/p&gt;

&lt;p&gt;2. I agree with what you&apos;ve come up with. Turning off the balancer would be a good idea, but I believe it would just miss possible problems if you don&apos;t (it wouldn&apos;t explode or anything). We should probably have someone run it against the assorted configurations (sharded, replicaset) to ensure we haven&apos;t missed any blatant problems.&lt;/p&gt;</comment>
                    </comments>
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                                        <issuelink>
            <issuekey id="111609">DOCS-2746</issuekey>
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