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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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            <title>[DOCS-4534] Description and settings for readahead and I/O Scheduler for SSD devices</title>
                <link>https://jira.mongodb.org/browse/DOCS-4534</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;Hi All,&lt;/p&gt;

&lt;p&gt;Is it possible to update our production notes and related documentation to include a section on the best value for readaheads for an SSD (typically 0 but test as with 32 for HDD as depends on workload and doc sizes) and the use of the &lt;tt&gt;noop&lt;/tt&gt; or &lt;tt&gt;deadline&lt;/tt&gt; I/O scheduler based on testing with the use case?&lt;/p&gt;

&lt;p&gt;Thanks!&lt;br/&gt;
Eoin&lt;/p&gt;</description>
                <environment></environment>
        <key id="174770">DOCS-4534</key>
            <summary>Description and settings for readahead and I/O Scheduler for SSD devices</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="eoin.brazil@mongodb.com">Eoin Brazil</reporter>
                        <labels>
                    </labels>
                <created>Tue, 16 Dec 2014 13:21:20 +0000</created>
                <updated>Wed, 11 Jan 2017 22:42:00 +0000</updated>
                            <resolved>Wed, 27 Jul 2016 19:03:57 +0000</resolved>
                                                    <fixVersion>01112017-cleanup</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>1</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="910022" author="emilio.scalise" created="Mon, 11 May 2015 15:30:28 +0000"  >&lt;p&gt;I think that it could be useful also add an example script to change readahead on linux distributions that use init.d like this:&lt;br/&gt;
&lt;a href=&quot;https://gist.github.com/roadst4r/8f4c435053556d493939&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://gist.github.com/roadst4r/8f4c435053556d493939&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I was trying to follow production notes on a centos 7 testing vm, and I lost a lot of time searching for a script that set readahead consistently between phyisical block devices and lvm and so on...&lt;/p&gt;

&lt;p&gt;And I think that many newbie customers has experienced this, seeing the number of CS tickets about this.&lt;/p&gt;

&lt;p&gt;Please note that I&apos;m not complaining on the correct value of readahead to set (that need to be tested and determined by customers&apos; tests), but for a quick way to set it for a wide range of linux distributions.&lt;/p&gt;</comment>
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            <issuekey id="33013">DOCS-164</issuekey>
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