Starting Jenkins with -Dhudson.model.Hudson.logStartupPerformance=true might give you some additional information about startup time. See https://wiki.jenkins-ci.org/display/JENKINS/Features+controlled+by+system+properties
We run Jenkins off a local disk for speed, and back up Jenkins home once a day (excluding the job history, which if we lost it we could live without). Matthew From: jenkinsci-users@googlegroups.com [mailto:jenkinsci-users@googlegroups.com] On Behalf Of swerner Sent: 27 July 2012 15:26 To: jenkinsci-users@googlegroups.com Subject: Jenkins slow coming up and clicking on views with builds with lots of history We recently moved off Hudson to the latest Jenkins (1.475). After doing so, we have noticed an increased startup time and clicking on tabs takes longer too. Upon further investigation, these jobs typically have a history of 100 or so builds. Dumping the stack while waiting produces the following: java.lang.Thread.State: RUNNABLE at java.io.UnixFileSystem.getBooleanAttributes0(Native Method) at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:228) at java.io.File.exists(File.java:733) at hudson.model.AbstractBuild.calcChangeSet(AbstractBuild.java:828) at hudson.model.AbstractBuild.getChangeSet(AbstractBuild.java:806) at hudson.model.View$People.isApplicable(View.java:674) at hudson.model.View.hasPeople(View.java:596) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.commons.jexl.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:258) at org.apache.commons.jexl.parser.ASTMethod.execute(ASTMethod.java:104) at org.apache.commons.jexl.parser.ASTReference.execute(ASTReference.java:83) at org.apache.commons.jexl.parser.ASTReference.value(ASTReference.java:57) at org.apache.commons.jexl.parser.ASTOrNode.value(ASTOrNode.java:61) at org.apache.commons.jexl.parser.ASTExpression.value(ASTExpression.java:54) at org.apache.commons.jexl.parser.ASTExpressionExpression.value(ASTExpressionExpression.java:56) at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:80) at hudson.ExpressionFactory2$JexlExpression.evaluate(ExpressionFactory2.java:72) ... To complicate things more, we actually run on a clustered filesystem (gluster), this we cannot change. We have noticed internally checking the existence of files and listing is significantly slower than a local filesystem, but the redundancy outweighs the slight performance impact. Before the upgrade, our Hudson was working fine on gluster. There was a slight boot delay, but never saw the lag on clicking on tabs like Jenkins. Did something change between distributions that you need to access the history everytime you view, can you not cache it? Also, most of our builds invoke shell scripts or call other java programs, there are no scm builds, so the calcChangeSet() is always empty, is there a way of bypassing the need of this call when scm is set to None?
