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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-12096] Enterprise rhel62 build is much slower than rhel57 build in GSSAPI Connection Performance</title>
                <link>https://jira.mongodb.org/browse/SERVER-12096</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;During my authentication perf test, found that rhel6.2 build is much slower in setting up GSSAPI connection than rhel5.7 build, and take much more CPU. &lt;/p&gt;

&lt;p&gt;This behavior is the same for 2.4.8 as well. In order to make sure this is not due to environment, I setup two setups, one in EC2 and one in my local environment. &lt;/p&gt;

&lt;p&gt;Here is output from EC2 (both server run with m1.xlarge)&lt;/p&gt;

&lt;p&gt;&lt;b&gt;2.5.5-pre (2013-12-11) rhel62 vs rhel57:&lt;/b&gt;&lt;br/&gt;
2.5.5-pre GSSAPI rh62/ec2   avg_time  uses  &lt;b&gt;332.926730102%&lt;/b&gt; more than  2.5.5-pre GSSAPI rh57/ec2 | 24.2043759705 vs 5.59087122313&lt;br/&gt;
2.5.5-pre GSSAPI rh62/ec2   CPU  uses  42.4165090943 % more than  2.5.5-pre GSSAPI rh57/ec2 | 94.9427373159 vs 66.6655417407&lt;/p&gt;

&lt;p&gt;the same behavior also presents with 2.4.8&lt;br/&gt;
&lt;b&gt;2.4.8 rhel62 vs rhel57:&lt;/b&gt;&lt;br/&gt;
2.4.8 GSSAPI rh62/ec2   avg_time  uses  &lt;b&gt;324.64563971 %&lt;/b&gt; more than  2.4.8 GSSAPI rh57/ec2 | 24.6068780705 vs 5.79468520797&lt;br/&gt;
2.4.8 GSSAPI rh62/ec2   CPU  uses  47.3761253618 % more than  2.4.8 GSSAPI rh57/ec2 | 94.6278591549 vs 64.2084048027&lt;/p&gt;

&lt;p&gt;similar from run from local VMs &lt;br/&gt;
2.5.5-pre GSSAPI   avg_time  uses  &lt;b&gt;137.642469807 %&lt;/b&gt; more than  2.5.5-pre GSSAPI rh57 | 9.49420886465 vs 3.99516503609&lt;br/&gt;
2.5.5-pre GSSAPI   CPU  uses  134.529540316 % more than  2.5.5-pre GSSAPI rh57 | 68.138736952 vs 29.0533707865&lt;/p&gt;</description>
                <environment></environment>
        <key id="102204">SERVER-12096</key>
            <summary>Enterprise rhel62 build is much slower than rhel57 build in GSSAPI Connection Performance</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="rui.zhang">Rui Zhang</assignee>
                                    <reporter username="rui.zhang">Rui Zhang</reporter>
                        <labels>
                            <label>26qa</label>
                    </labels>
                <created>Sat, 14 Dec 2013 05:00:24 +0000</created>
                <updated>Mon, 19 May 2014 22:10:13 +0000</updated>
                            <resolved>Fri, 17 Jan 2014 19:06:53 +0000</resolved>
                                    <version>2.4.8</version>
                    <version>2.5.3</version>
                                                    <component>Security</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="473232" author="rui.zhang" created="Thu, 19 Dec 2013 18:11:59 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=schwerin&quot; class=&quot;user-hover&quot; rel=&quot;schwerin&quot;&gt;schwerin&lt;/a&gt;  will do, I am trying to wrap up Windows platform testing, after it is done, will collect more details for this ticket and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-12087&quot; title=&quot;GSSAPI Auth use ~10% more memory during perf test&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-12087&quot;&gt;&lt;del&gt;SERVER-12087&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="473142" author="schwerin" created="Thu, 19 Dec 2013 15:48:43 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rui.zhang&quot; class=&quot;user-hover&quot; rel=&quot;rui.zhang&quot;&gt;rui.zhang&lt;/a&gt;, can you and Davide use the gperftools CPU profiler or the valgrind callgrind tool to collect profiles of the benchmark running on the two platforms?  I suspect this issue is beyond our control, but a profile graph would help.&lt;/p&gt;</comment>
                            <comment id="473061" author="rui.zhang" created="Thu, 19 Dec 2013 13:31:55 +0000"  >&lt;p&gt;Re-assign this to &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=schwerin&quot; class=&quot;user-hover&quot; rel=&quot;schwerin&quot;&gt;schwerin&lt;/a&gt;, please re-assign if this shall go to another engineer. Thanks&lt;/p&gt;</comment>
                            <comment id="473043" author="dan@10gen.com" created="Thu, 19 Dec 2013 12:51:04 +0000"  >&lt;p&gt;What is the test doing?&lt;/p&gt;</comment>
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