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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>[SERVER-16625] Improve WiredTiger heap usage</title>
                <link>https://jira.mongodb.org/browse/SERVER-16625</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I have the following observations from WiredTiger stack that i investigated:&lt;/p&gt;

&lt;p&gt;1)      WT use calloc for heap operations, malloc should be cheaper to use.&lt;/p&gt;

&lt;p&gt;2)      I also suggest using Low fragmentation heap (&lt;a href=&quot;http://msdn.microsoft.com/en-us/library/windows/desktop/aa366750%28v=vs.85%29.aspx&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://msdn.microsoft.com/en-us/library/windows/desktop/aa366750%28v=vs.85%29.aspx&lt;/a&gt;),  we have something like LFH implemented in MMAP &lt;/p&gt;

&lt;p&gt;1) i opened this as FYI, in case we have to improve this now&lt;br/&gt;
2) Please assign this to me and i will create the workload that measured the impact post 2.8&lt;/p&gt;

&lt;p&gt;Eitan&lt;/p&gt;
</description>
                <environment></environment>
        <key id="175741">SERVER-16625</key>
            <summary>Improve WiredTiger heap usage</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="4">Incomplete</resolution>
                                        <assignee username="eitan.klein">Eitan Klein</assignee>
                                    <reporter username="eitan.klein">Eitan Klein</reporter>
                        <labels>
                    </labels>
                <created>Mon, 22 Dec 2014 13:51:04 +0000</created>
                <updated>Thu, 5 Mar 2015 04:55:08 +0000</updated>
                            <resolved>Thu, 5 Mar 2015 04:55:08 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="792282" author="alvin" created="Mon, 22 Dec 2014 19:06:24 +0000"  >&lt;p&gt;thanks for logging. Bear in mind and info you put in here is public by&lt;br/&gt;
default. So if you want to retain some information in private (e.g. email&lt;br/&gt;
communication) you should add this as a comment and mark as &quot;Developer&lt;br/&gt;
Only&quot;. That will make it private.&lt;/p&gt;


&lt;p&gt;-Alvin&lt;/p&gt;

&lt;p&gt;On Mon, Dec 22, 2014 at 5:52 AM, Eitan Klein (JIRA) &amp;lt;jira@mongodb.org&amp;gt;&lt;/p&gt;
</comment>
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