[JIRA] (OVIRT-1756) configure jenkins.ovirt.org to G1 garbage collector

12 Nov 2017


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     [ https://ovirt-jira.atlassian.net/browse/OVIRT-1756?page=com.atlassian.jira.p... ]

Barak Korren updated OVIRT-1756:
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    Component/s: oVirt CI
      Epic Link: OVIRT-403
     Issue Type: Improvement  (was: By-EMAIL)
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configure jenkins.ovirt.org to G1 garbage collector
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Key: OVIRT-1756
                URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1756
            Project: oVirt - virtualization made easy
         Issue Type: Improvement
         Components: oVirt CI
           Reporter: rgolanbb
           Assignee: infra
I noticed jenkins process cpu consumption going over 100% and stalling the
web handlers. The io wait is not a problem nor mem.
What I suspect is going on is tons of GC and GC pressure given that 12GB
heap and fairly nice amount of users and requests.
What we can do is to configure the gc logging to see if that is really GC
pauses really and to move to using the G1 garbage collector.
See this post from cloudbees on the move to G1 collector
https://www.cloudbees.com/blog/joining-big-leagues-tuning-jenkins-gc-respons...
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<pre>[ https://ovirt-jira.atlassian.net/browse/OVIRT-1756?page=com.atlassian.jira.p... ]</pre>
<h3>Barak Korren updated OVIRT-1756:</h3>
<pre>Component/s: oVirt CI
  Epic Link: OVIRT-403
 Issue Type: Improvement  (was: By-EMAIL)</pre>
<blockquote><h3>configure jenkins.ovirt.org to G1 garbage collector</h3>
<pre>     Key: OVIRT-1756
     URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1756
 Project: oVirt - virtualization made easy
         Issue Type: Improvement
         Components: oVirt CI
Reporter: rgolanbb
Assignee: infra</pre>
<p>I noticed jenkins process cpu consumption going over 100% and stalling the web handlers. The io wait is not a problem nor mem. What I suspect is going on is tons of GC and GC pressure given that 12GB heap and fairly nice amount of users and requests. What we can do is to configure the gc logging to see if that is really GC pauses really and to move to using the G1 garbage collector. See this post from cloudbees on the move to G1 collector <a href="https://www.cloudbees.com/blog/joining-big-leagues-tuning-jenkins-gc-responsiveness-and-stability">https://www.cloudbees.com/blog/joining-big-leagues-tuning-jenkins-gc-responsiveness-and-stability</a></p></blockquote>
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Barak Korren (oVirt JIRA)

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