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    <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-5432] Clarify &quot;show dbs&quot; behavior</title>
                <link>https://jira.mongodb.org/browse/DOCS-5432</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;DocumentationChanges&quot;&gt;&lt;/a&gt;Documentation Changes&lt;/h2&gt;
&lt;ul&gt;
	&lt;li&gt;Make a note in reference/mongo-shell explaining that empty databases are not listed.&lt;/li&gt;
	&lt;li&gt;Explain that &quot;use &amp;lt;db&amp;gt;&quot; does not create a database.&lt;/li&gt;
&lt;/ul&gt;


&lt;h2&gt;&lt;a name=&quot;BehaviorSummary&quot;&gt;&lt;/a&gt;Behavior Summary&lt;/h2&gt;
&lt;blockquote&gt;
&lt;p&gt;Databases are created and exist after inserting the first document into a collection in the database. Databases and collections are created implicitly; however, creating a database or collection object in your client does not create a database or collection. use &amp;lt;db&amp;gt; does not create new database files.&lt;/p&gt;

&lt;p&gt;Empty databases are not listed in the output of show dbs. This is partially storage engine dependent. MMAPv1, it&apos;s impossible to have an extant but empty database: you cannot create a database except by inserting data. Even if you later drop that data, there is a small amount of internal overhead that remains. The one exception is that before 3.0, show dbs reported the admin database as empty in some cases, but there were no corresponding. WiredTiger does not report databases that do not have data, other storage engines may have different behavior here.&lt;/p&gt;&lt;/blockquote&gt;</description>
                <environment></environment>
        <key id="204085">DOCS-5432</key>
            <summary>Clarify &quot;show dbs&quot; behavior</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="kay.kim@mongodb.com">Kay Kim</reporter>
                        <labels>
                    </labels>
                <created>Thu, 14 May 2015 00:28:40 +0000</created>
                <updated>Mon, 30 Oct 2023 22:29:15 +0000</updated>
                            <resolved>Tue, 1 Nov 2022 11:02:42 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="4943672" author="edu.bot" created="Tue, 1 Nov 2022 11:02:38 +0000"  >&lt;p&gt;Hello! This ticket has been closed due to inactivity. If you believe this ticket is still important, please reopen it and leave a comment to explain why. Thank you!&lt;/p&gt;</comment>
                            <comment id="2015779" author="kevin.adistambha" created="Thu, 27 Sep 2018 01:17:36 +0000"  >&lt;p&gt;The database size number next to the database names needs to be documented as reflecting the database size on disk: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/v4.0/src/mongo/shell/utils.js#L882&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/v4.0/src/mongo/shell/utils.js#L882&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Therefore nodes in a replica set would be expected to have different database sizes, especially a newly synced member.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="201909">SERVER-18313</issuekey>
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