My issue turned out to be a simple matter of CPU exhaustion after all. There's something funny with the threads on 2.6 kernels and procps (at least the one in Debian Sarge) in that top will only show the parent process and not show any of the threads. Therefore the CPU was actually much busier than one would think by looking at the process list in top.
Thanks very much for your help though. Dave On Thu, 2006-10-12 at 09:04 +1000, David Brodrick wrote: > Hi All, > I'm chasing a problem where a (normally) smoothly-running java program > seems to briefly stall from time-to-time. > > The CPU does not appear exhausted (according to "top") but the machine > is still fairly busy. One of the things that makes the machine busy is a > program that fires up a different java program in a tight loop. > > I was wondering whether different JVMs on the same host can interact in > some way? Are there any common resources that could enable one JVM to be > blocked for a short period while another JVM is starting up? Or is my > problem more likely to be normal resource (CPU) competition? > > I suspect it's the latter but thought I'd ask the experts to be sure. > I'm running: > Java(TM) 2 Runtime Environment, Standard Edition (build > Blackdown-1.4.2-rc1) > Java HotSpot(TM) Client VM (build Blackdown-1.4.2-rc1, mixed mode) > > Many thanks, > Dave > > > ---------------------------------------------------------------------- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] ---------------------------------------------------------------------- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
