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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-14154] [Atlas] The incorrect WiredTiger cache size for Atlas M30 or lower Clusters.</title>
                <link>https://jira.mongodb.org/browse/DOCS-14154</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;

&lt;p&gt;Documentation Link - &lt;a href=&quot;https://docs.atlas.mongodb.com/sizing-tier-selection#memory&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.atlas.mongodb.com/sizing-tier-selection#memory&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Hello Team,&lt;/p&gt;

&lt;p&gt;Recently, I have discussed the above document with one of WiredTiger experts and we strongly believe the below information is very misleading:&lt;/p&gt;

&lt;p&gt;&lt;em&gt;WiredTiger dedicates 50% of physical RAM for the WiredTiger cache.&lt;/em&gt;&lt;/p&gt;

&lt;p&gt;Actually, this is not the case for Atlas M30 or lower Clusters based on the &lt;a href=&quot;https://wiki.corp.mongodb.com/display/cs/Cloud+Provider+Instance+Size+Specifications&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Cloud Provider Instance Size Specifications&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;So, we think this comment could completely confuse our customer&apos;s calculations for their working set on Atlas clusters. &lt;/p&gt;

&lt;p&gt;Therefore, could we please change it to something like this to avoid any misleading?&lt;/p&gt;

&lt;p&gt;&lt;em&gt;&lt;b&gt;By default, for M40 or Larger Clusters,&lt;/b&gt; WiredTiger dedicates 50% of physical RAM for the WiredTiger cache.&lt;/em&gt;&lt;/p&gt;

&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="1599109">DOCS-14154</key>
            <summary>[Atlas] The incorrect WiredTiger cache size for Atlas M30 or lower Clusters.</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="13201">Fixed</resolution>
                                        <assignee username="corry.root@mongodb.com">Corry Root</assignee>
                                    <reporter username="seunghyoung.lee@mongodb.com">Seunghyoung Lee</reporter>
                        <labels>
                    </labels>
                <created>Mon, 25 Jan 2021 06:03:48 +0000</created>
                <updated>Sun, 29 Oct 2023 13:54:21 +0000</updated>
                            <resolved>Wed, 10 Feb 2021 13:08:42 +0000</resolved>
                                                                    <component>Atlas</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3608141" author="seunghyoung.lee" created="Tue, 9 Feb 2021 22:52:04 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=corry.root&quot; class=&quot;user-hover&quot; rel=&quot;corry.root&quot;&gt;corry.root&lt;/a&gt; Thank you for the update. It looks good to me. &lt;/p&gt;</comment>
                            <comment id="3604888" author="JIRAUSER1257146" created="Mon, 8 Feb 2021 17:50:52 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=seunghyoung.lee&quot; class=&quot;user-hover&quot; rel=&quot;seunghyoung.lee&quot;&gt;seunghyoung.lee&lt;/a&gt;, the existing memory information applied only to M40 or larger clusters, but did not clarify. I updated the memory information to specify the information applies to M40 or larger clusters by default.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://docs-atlas-staging.mongodb.com/cloud-docs/docsworker-xlarge/DOCS-14154/sizing-tier-selection/#memory&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;STAGE&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://workerpool-boxgs.mongodbstitch.com/pages/job.html?jobId=60217832ab23346c20ec7e11&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;BUILD&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3604628" author="JIRAUSER1257146" created="Mon, 8 Feb 2021 16:31:04 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jeffrey.allen&quot; class=&quot;user-hover&quot; rel=&quot;jeffrey.allen&quot;&gt;jeffrey.allen&lt;/a&gt;,&#160;the existing memory information applied only to M40 or larger clusters, but did not clarify. I updated the memory information to specify the information applies to M40 or larger clusters by default.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://docs-atlas-staging.mongodb.com/cloud-docs/docsworker-xlarge/DOCS-14154/sizing-tier-selection/#memory&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;STAGE&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://workerpool-boxgs.mongodbstitch.com/pages/job.html?jobId=602165bbab23346c20e8f94f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;BUILD&lt;/a&gt;&lt;/p&gt;</comment>
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