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    <title>MongoDB Jira</title>
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    <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-7669] wiredTigerCacheSizeGB, inMemorySizeGB default and floor lowered and can now be specified as a float</title>
                <link>https://jira.mongodb.org/browse/DOCS-7669</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;See: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23624&quot; title=&quot;Allow wiredTigerCacheSizeGB to be specified as a float&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23624&quot;&gt;&lt;del&gt;SERVER-23624&lt;/del&gt;&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23658&quot; title=&quot;Lower default wiredTigerCacheSizeGB to 50% of available memory&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23658&quot;&gt;&lt;del&gt;SERVER-23658&lt;/del&gt;&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23624&quot; title=&quot;Allow wiredTigerCacheSizeGB to be specified as a float&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23624&quot;&gt;&lt;del&gt;SERVER-23624&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The minimum floor for &lt;tt&gt;wiredTigerCacheSizeGB&lt;/tt&gt; has been lowered from 1GB to 256MB to better support low memory machines.  Also, the default setting has been lowered from 60% to 50% of available memory (I believe the documentation was never updated to reflect the 60% change made in 3.2, so this may be a no-op).&lt;/p&gt;

&lt;p&gt;To better support fine grained control of the cache size, it is also now possible to specify the setting as a float, for example &lt;tt&gt;--wiredTigerCacheSizeGB 2.4&lt;/tt&gt;, etc.&lt;/p&gt;

&lt;p&gt;The maximum cache size remains 10TB.&lt;/p&gt;

&lt;p&gt;These settings are the same for both the WiredTiger &lt;b&gt;and&lt;/b&gt; the inMemory storage engine.  This change is onlyl in effect for current master which will become 3.4.0&lt;/p&gt;</description>
                <environment></environment>
        <key id="280191">DOCS-7669</key>
            <summary>wiredTigerCacheSizeGB, inMemorySizeGB default and floor lowered and can now be specified as a float</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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-3.4</label>
                    </labels>
                <created>Sat, 16 Apr 2016 02:28:26 +0000</created>
                <updated>Tue, 6 Dec 2022 04:29:32 +0000</updated>
                            <resolved>Thu, 20 Oct 2016 01:21:00 +0000</resolved>
                                                    <fixVersion>3.3.5</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1413333" author="kay.kim@10gen.com" created="Thu, 20 Oct 2016 01:20:49 +0000"  >&lt;p&gt;xgen-internal-githook Githook User added a comment - Oct 19 2016 09:16:10 PM GMT-0400&lt;br/&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-7669&quot; title=&quot;wiredTigerCacheSizeGB, inMemorySizeGB default and floor lowered and can now be specified as a float&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-7669&quot;&gt;&lt;del&gt;DOCS-7669&lt;/del&gt;&lt;/a&gt; WT cache setting values&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/44b7172d018fe4c5134dca4dd576f68138281c78&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/44b7172d018fe4c5134dca4dd576f68138281c78&lt;/a&gt;&lt;/p&gt;</comment>
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