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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-36776] Performance degradation with threads increasing in YCSB WorkloadE test</title>
                <link>https://jira.mongodb.org/browse/SERVER-36776</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In order to test performance with ARMv8 based CPU.&lt;/p&gt;

&lt;p&gt;Use YCSB to test MongoDB.&lt;/p&gt;

&lt;p&gt;In 1-16 threads, the performance have a growth curve similar to X86.&#160;&lt;/p&gt;

&lt;p&gt;But in 32 threads or above, the performance reduce and keep at a low level.&lt;/p&gt;

&lt;p&gt;only in Workload E&lt;/p&gt;
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&lt;p&gt;So, I want to know&#160;why this is happening&#12290;&lt;/p&gt;

&lt;p&gt;Thanks.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment>ARMv8 48 core 1 socket CPU&#65292; model Confidentiality&lt;br/&gt;
OS Version  ,CentOS Linux release 7.5.1804&lt;br/&gt;
gcc version 6.2.1 20161016 (Linaro GCC 6.2-2016.11)&lt;br/&gt;
OpenJDK Runtime Environment (build 1.8.0_151-b12)</environment>
        <key id="591357">SERVER-36776</key>
            <summary>Performance degradation with threads increasing in YCSB WorkloadE test</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="9">Done</resolution>
                                        <assignee username="nick.brewer">Nick Brewer</assignee>
                                    <reporter username="Seeker">Xun LI [X]</reporter>
                        <labels>
                            <label>test-only</label>
                    </labels>
                <created>Tue, 21 Aug 2018 01:35:13 +0000</created>
                <updated>Sat, 15 Sep 2018 14:48:52 +0000</updated>
                            <resolved>Tue, 21 Aug 2018 04:18:31 +0000</resolved>
                                    <version>3.4.10</version>
                    <version>3.6.1</version>
                    <version>4.0.1</version>
                                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1980852" author="seeker" created="Tue, 21 Aug 2018 05:05:16 +0000"  >&lt;p&gt;Hi&lt;/p&gt;

&lt;p&gt;&#160; &#160;I did building mongod from source.&lt;/p&gt;

&lt;p&gt;&#160; &#160;But in Ubuntu 16.04.1 LTS, I found the same problem.&#160;&lt;/p&gt;</comment>
                            <comment id="1980842" author="nick.brewer" created="Tue, 21 Aug 2018 04:18:21 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=Seeker&quot; class=&quot;user-hover&quot; rel=&quot;Seeker&quot;&gt;Seeker&lt;/a&gt; MongoDB does not provide an ARM binary for CentOS - based on the environment information you&apos;ve provided, I assume you&apos;re building mongod from source. &lt;/p&gt;

&lt;p&gt;If you would like to see a CentOS binary included in the platforms actively supported by MongoDB, please open a separate ticket detailing your request. &lt;/p&gt;

&lt;p&gt;Thanks, &lt;br/&gt;
Nick&lt;/p&gt;</comment>
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