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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>[SERVER-4538] add pagefault detection on Windows</title>
                <link>https://jira.mongodb.org/browse/SERVER-4538</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;implement pagefault detection so that we don&apos;t always yield if the page is actually in our working set already.&lt;/p&gt;</description>
                <environment>Windows</environment>
        <key id="27076">SERVER-4538</key>
            <summary>add pagefault detection on Windows</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                            <label>rn</label>
                    </labels>
                <created>Wed, 21 Dec 2011 19:03:48 +0000</created>
                <updated>Mon, 11 Jul 2016 18:35:46 +0000</updated>
                            <resolved>Wed, 21 Dec 2011 19:07:31 +0000</resolved>
                                                    <fixVersion>2.1.0</fixVersion>
                                    <component>Concurrency</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="75161" author="auto" created="Wed, 21 Dec 2011 19:31:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4538&quot; title=&quot;add pagefault detection on Windows&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4538&quot;&gt;&lt;del&gt;SERVER-4538&lt;/del&gt;&lt;/a&gt; fix code buffer size calculation&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e07910f4c70d42be505fc0af97735a5aac55e67d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e07910f4c70d42be505fc0af97735a5aac55e67d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="75129" author="auto" created="Wed, 21 Dec 2011 19:07:20 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4538&quot; title=&quot;add pagefault detection on Windows&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4538&quot;&gt;&lt;del&gt;SERVER-4538&lt;/del&gt;&lt;/a&gt;  detect if pages are in our working set, on Windows&lt;/p&gt;

&lt;p&gt;If the page is not in our working set, this function will return false.&lt;br/&gt;
This will be true for both hard and soft pagefaults; however, it is expected&lt;br/&gt;
under normal circumstances that most pagefaults will be hard (need to be loaded&lt;br/&gt;
from the pagefile on disk into RAM).&lt;br/&gt;
On a server with nothing else on it, the OS ought to allow mongod&apos;s working set&lt;br/&gt;
to expand to &quot;most&quot; of RAM, thus avoiding many soft pagefaults.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/15d5ed29163283a784fab344f50404a0a46207af&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/15d5ed29163283a784fab344f50404a0a46207af&lt;/a&gt;&lt;/p&gt;</comment>
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