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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-5682] Document that the size and count in collection stats is not guaranteed to be 100% accurate</title>
                <link>https://jira.mongodb.org/browse/DOCS-5682</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;See: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19052&quot; title=&quot;Remove sizeStorer recalculations at startup with WiredTiger&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19052&quot;&gt;&lt;del&gt;SERVER-19052&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
With WiredTiger, the size and count stats are not guaranteed to be accurate in the event of an unclean shutdown because the size and count are only persisted every 1000 writes.  Accurate values can be restored by performing a validate command on any collection that has drifted.&lt;/p&gt;</description>
                <environment></environment>
        <key id="211982">DOCS-5682</key>
            <summary>Document that the size and count in collection stats is not guaranteed to be 100% accurate</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="dan@mongodb.com">Daniel Pasette</reporter>
                        <labels>
                            <label>docs-3.2</label>
                    </labels>
                <created>Fri, 19 Jun 2015 22:32:23 +0000</created>
                <updated>Wed, 11 Jan 2017 22:33:29 +0000</updated>
                            <resolved>Fri, 4 Dec 2015 19:29:24 +0000</resolved>
                                                    <fixVersion>01112017-cleanup</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1105312" author="xgen-internal-githook" created="Fri, 4 Dec 2015 07:49:56 +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-5682&quot; title=&quot;Document that the size and count in collection stats is not guaranteed to be 100% accurate&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-5682&quot;&gt;&lt;del&gt;DOCS-5682&lt;/del&gt;&lt;/a&gt; size and count stats for WT&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/1769b8687cdca9df03ffda67e08118d18d0cfa91&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/1769b8687cdca9df03ffda67e08118d18d0cfa91&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="946489" author="max.hirschhorn@10gen.com" created="Sun, 21 Jun 2015 22:30:09 +0000"  >&lt;p&gt;It is probably worth mentioning that the user must perform a full validation&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.runCommand({validate: &quot;collName&quot;, full: true})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
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&lt;p/&gt;

&lt;p&gt;in order to restore the accuracy of the size and count stats. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/299b2c1d833c6ca537e300b5bc49384a7a81e5cd/src/mongo/db/storage/wiredtiger/wiredtiger_record_store.cpp#L987-L997&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Implementation details&lt;/a&gt;.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10320">
                    <name>Documented</name>
                                            <outwardlinks description="documents">
                                        <issuelink>
            <issuekey id="217373">SERVER-19472</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="211844">SERVER-19052</issuekey>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="289627">DOCS-7979</issuekey>
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