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    <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-42224] Add a server parameter maxValidateMBPerSec to specify max validate throughput per validate command in order to limit I/O and CPU usage</title>
                <link>https://jira.mongodb.org/browse/SERVER-42224</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This task should add the new server parameter that can be set via the server startup command line invocation and dynamically while the server is running.&lt;/p&gt;</description>
                <environment></environment>
        <key id="856082">SERVER-42224</key>
            <summary>Add a server parameter maxValidateMBPerSec to specify max validate throughput per validate command in order to limit I/O and CPU usage</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="13201">Fixed</resolution>
                                        <assignee username="gabe.villasana@mongodb.com">Gabriel Villasana</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Fri, 12 Jul 2019 21:36:29 +0000</created>
                <updated>Sun, 29 Oct 2023 22:19:03 +0000</updated>
                            <resolved>Thu, 8 Aug 2019 15:24:24 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2362997" author="xgen-internal-githook" created="Thu, 8 Aug 2019 15:24:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gabe Villasana&apos;, &apos;email&apos;: &apos;villagab4@gmail.com&apos;, &apos;username&apos;: &apos;villagab4&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42224&quot; title=&quot;Add a server parameter maxValidateMBPerSec to specify max validate throughput per validate command in order to limit I/O and CPU usage&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42224&quot;&gt;&lt;del&gt;SERVER-42224&lt;/del&gt;&lt;/a&gt; Add a server parameter maxValidateMBperSec to specify max validate throughput per validate command in order to limit I/O and CPU usage&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/321201823455e1c648b7c6bd4ae0a59d1b7115b8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/321201823455e1c648b7c6bd4ae0a59d1b7115b8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2346064" author="dianna.hohensee" created="Fri, 26 Jul 2019 18:23:41 +0000"  >&lt;p&gt;Leaning towards using loadRelaxed(), but TBD.&lt;/p&gt;</comment>
                            <comment id="2324018" author="dianna.hohensee" created="Fri, 12 Jul 2019 22:12:37 +0000"  >&lt;p&gt;Would calling &amp;lt;atomic_server_param_variable&amp;gt;.load() for every collection/index document we load be a perf hit?&lt;/p&gt;</comment>
                            <comment id="2324010" author="geert.bosch" created="Fri, 12 Jul 2019 22:05:14 +0000"  >&lt;p&gt;1. There should be no default: if the parameter is not specified, we go as fast as we can.&lt;br/&gt;
2. Yes, that&apos;s why it is a parameter. The idea is that if an ongoing validation is causing operational issues (timeouts, cache pressure, etc.), the parameter can be changed to throttle down the validation.&lt;/p&gt;</comment>
                            <comment id="2323974" author="dianna.hohensee" created="Fri, 12 Jul 2019 21:39:30 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=geert.bosch&quot; class=&quot;user-hover&quot; rel=&quot;geert.bosch&quot;&gt;geert.bosch&lt;/a&gt;, two questions:&lt;br/&gt;
1. do you have a recommendation on a default value?&lt;br/&gt;
2. should a user be able to change maxValidateMBperSec while a validation command is running and expect the already in-progress validation command to obey the new maxValidateMBperSec value, or keep using the value is found when starting the command?&lt;/p&gt;</comment>
                    </comments>
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                    <name>Depends</name>
                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="856090">SERVER-42226</issuekey>
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                            <customfieldvalue>New server parameter that can be set at startup or runtime called &amp;#39;maxValidateMBperSec&amp;#39; which takes an int.&lt;br/&gt;
&lt;br/&gt;
The parameter ensures that while running the &amp;#39;validate&amp;#39; command, each &amp;#39;validate&amp;#39; command running at that time will limit the amount of data processed to maxValidateMBperSec in order to limit I/O and CPU usage.&lt;br/&gt;
&lt;br/&gt;
Defaults to 0, which turns off throttling.</customfieldvalue>

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