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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-9708] Calculate config server db size</title>
                <link>https://jira.mongodb.org/browse/SERVER-9708</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Is there any way to calculate approximate maximal config server database size, if I know storage limit for all mongod instances in replica sets of sharded cluster?  &lt;/p&gt;</description>
                <environment></environment>
        <key id="75537">SERVER-9708</key>
            <summary>Calculate config server db size</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="stephen.steneker@mongodb.com">Stennie Steneker</assignee>
                                    <reporter username="nick.demyanchuk">Nick Demyanchuk</reporter>
                        <labels>
                    </labels>
                <created>Thu, 16 May 2013 09:23:46 +0000</created>
                <updated>Wed, 10 Dec 2014 23:11:55 +0000</updated>
                            <resolved>Tue, 28 May 2013 01:12:11 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="346731" author="nick.demyanchuk" created="Tue, 28 May 2013 10:44:24 +0000"  >&lt;p&gt;Thank you, Stephen!&lt;/p&gt;</comment>
                            <comment id="346504" author="stennie" created="Tue, 28 May 2013 01:11:48 +0000"  >&lt;p&gt;Hi Nick,&lt;/p&gt;

&lt;p&gt;The config database stores metadata about your sharded cluster, and the size is not specifically related to the storage limit of your individual mongod instances.  The config database is typically very small (on the order of Mb, not Gb).  The largest collection in the config database is often the changelog, which is a 10Mb capped collection.  The size of the metadata will vary based on your shard keys, chunk size, and data.&lt;/p&gt;

&lt;p&gt;The manual contains more information on the &lt;a href=&quot;http://docs.mongodb.org/manual/reference/config-database/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;collections in the config database&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;I would also note that the SERVER project is for reporting bugs or feature suggestions for the MongoDB server.&lt;/p&gt;

&lt;p&gt;For MongoDB-related support discussion you should post on the mongodb-users group (&lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://groups.google.com/group/mongodb-user&lt;/a&gt;) or Stack Overflow / ServerFault.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Stephen&lt;/p&gt;</comment>
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