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https://issues.jenkins-ci.org/browse/JENKINS-13547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=163476#comment-163476
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Thomas Lehmann commented on JENKINS-13547:
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Update. We've isolated the problem.
Jenkins speed up dramatically when changing the apache's configuration.
Previously our Apache was configured using mod_jk via AJP.
We got aware of this after connecting to the Jenkins machine's port directly
which worked quiet fast.
Now we've configured it to use mod_proxy. It's much better, but even not so
fast as connecting directly to $JENKINS_HOST.
It's not clear why Jenkins slowed down so much when activationg Crowd (the
forwarding config did not change inbetween).
I've also noticed that there is constant traffic noise between the JENKINS_HOST
and the CROWD_HOST with about 2 connects per second. The traffic does not
correspond to any established connection from the browser to Jenkins (I've
expected this due to the AJAX polling). In other words: 0 requests per 10 secs
from browser to Jenkins, ~20 connects per 10 sec from Jenkins to Crowd.
Is that normal?
> Jenkins runs extremely slow with remote crowd server
> ----------------------------------------------------
>
> Key: JENKINS-13547
> URL: https://issues.jenkins-ci.org/browse/JENKINS-13547
> Project: Jenkins
> Issue Type: Bug
> Components: crowd2
> Environment: Centos/RHEL 6.2
> Jenkins 1.460
> Crowd 2.2.7
> Reporter: Joel Pearson
> Assignee: Thorsten Heit
> Priority: Critical
>
> When Crowd is running on a different continent to Jenkins, the performance of
> Jenkins is drastically affected, to the point that Jenkins is unusable.
> It seems like that every request to Jenkins gets authenticated to Crowd or
> something like that.
> The original Crowd plugin does not have this problem and does not affect the
> performance of Jenkins in any visible form.
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