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

[rgolanbb (oVirt JIRA)]

rgolanbb created OVIRT-1756:
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             Summary: configure jenkins.ovirt.org to G1 garbage collector
                 Key: OVIRT-1756
                 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1756
             Project: oVirt - virtualization made easy
          Issue Type: By-EMAIL
            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-responsiveness-and-stability



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