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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>[SERVER-7570] Add a function to ProcessInfo that checks whether a range of contiguous memory pages are in RAM</title>
                <link>https://jira.mongodb.org/browse/SERVER-7570</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The currently available ProcessInfo::blockInMemory(...) only accepts one page at a time. The mincore function on UNIX and QueryWSEx on Windows accept a range of pages: exposing this functionality makes it possible to know which pages of an entire extent or database file are likely in memory with a single call.&lt;/p&gt;</description>
                <environment></environment>
        <key id="55431">SERVER-7570</key>
            <summary>Add a function to ProcessInfo that checks whether a range of contiguous memory pages are in RAM</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="andrea.lattuada@10gen.com">Andrea Lattuada</assignee>
                                    <reporter username="andrea.lattuada@10gen.com">Andrea Lattuada</reporter>
                        <labels>
                    </labels>
                <created>Tue, 6 Nov 2012 21:13:47 +0000</created>
                <updated>Mon, 11 Jul 2016 17:58:46 +0000</updated>
                            <resolved>Wed, 14 Nov 2012 02:31:06 +0000</resolved>
                                                    <fixVersion>2.3.1</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="188539" author="auto" created="Wed, 14 Nov 2012 00:40:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-11-14T00:40:27Z&apos;, u&apos;email&apos;: u&apos;redbeard0531@gmail.com&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;}
&lt;p&gt;Message: Merge pull request #324 from utaal/blockInMemory-pagesInMemory&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7570&quot; title=&quot;Add a function to ProcessInfo that checks whether a range of contiguous memory pages are in RAM&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7570&quot;&gt;&lt;del&gt;SERVER-7570&lt;/del&gt;&lt;/a&gt; changed ProcessInfo::blockInMemory to leverage getPageSize, added pagesInMemory&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3d12b1bd473463f8be7c7c70ee78f7740ba15f12&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3d12b1bd473463f8be7c7c70ee78f7740ba15f12&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="188538" author="auto" created="Wed, 14 Nov 2012 00:40:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-11-13T21:34:57Z&apos;, u&apos;email&apos;: u&apos;andrea.lattuada@10gen.com&apos;, u&apos;name&apos;: u&apos;Andrea Lattuada&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7570&quot; title=&quot;Add a function to ProcessInfo that checks whether a range of contiguous memory pages are in RAM&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7570&quot;&gt;&lt;del&gt;SERVER-7570&lt;/del&gt;&lt;/a&gt; changed ProcessInfo::blockInMemory to leverage getPageSize, added pagesInMemory&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fe38a5e9f8a06e0db57e89b97b9af1bfb789bff0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fe38a5e9f8a06e0db57e89b97b9af1bfb789bff0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="183665" author="auto" created="Wed, 7 Nov 2012 18:37:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-11-06T18:37:15Z&apos;, u&apos;email&apos;: u&apos;andrea.lattuada@10gen.com&apos;, u&apos;name&apos;: u&apos;Andrea Lattuada&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7570&quot; title=&quot;Add a function to ProcessInfo that checks whether a range of contiguous memory pages are in RAM&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7570&quot;&gt;&lt;del&gt;SERVER-7570&lt;/del&gt;&lt;/a&gt; Initialize ProcessInfo::SystemInfo at startup, add pageSize.&lt;/p&gt;

&lt;p&gt;Signed-off-by: Andy Schwerin &amp;lt;schwerin@10gen.com&amp;gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1538f5d076fc15b5736d8535316daed72b26f987&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1538f5d076fc15b5736d8535316daed72b26f987&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="183277" author="andrea.lattuada@10gen.com" created="Tue, 6 Nov 2012 21:19:53 +0000"  >&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/pull/321&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/pull/321&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;System-wide info in ProcessInfo is currently initialized lazily because there was no support for initialization at startup time. The new code leverages MONGO_INITIALIZER* (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5112&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-5112&lt;/a&gt;) to create a single instance of ProcessInfo::SystemInfo at startup.&lt;/p&gt;</comment>
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