@Dennys Hsieh
How many executors you have configured on the master node?

On Wednesday, April 20, 2016 at 9:13:47 AM UTC+3, Daniel Beck wrote:
>
> Would be interesting to know what's the output of /threadDump when this is 
> going on. 18 builds is much less than Jenkins should be able to handle. 
>
> > On 20.04.2016, at 06:45, dennys <[email protected] <javascript:>> 
> wrote: 
> > 
> > We use 1 Jenkins and 30 Jenkins slaves. 
> > (Jenkins master doesn't build code, only slaves build code.) 
> > But when there are about 18 build jobs at the same time, Jenkins will 
> hang 
> > for a while. 
> > 
> > Jenkins master has 16 cores and the CPU loading is about 50% when the 
> server 
> > is hang. 
> > The following is the JVM parameter, is there any suggestion for it? 
> > 
> > -Xms4096m 
> > -Xmx4096m 
> > -XX:MaxPermSize=800M 
> > -XX:+UseParallelOldGC 
> > -XX:+HeapDumpOnOutOfMemoryError 
> > -Dorg.eclipse.jetty.server.Request.maxFormContentSize=5000000 
> > 
> > 
> > 
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