On Tue, Apr 22, 2008, Zhou, Bo(Bram) wrote: > Adrian, > > I'm using RHE4 with kernel 2.6.9. I used top to collect CPU utilization and > didn't use oprofile but just installed. I will use it to do profiling in the > later testing session. Thanks for your reminder. Make sure you also install the glibc library debug package. Its also a good idea to graph/sample the top-level system stats - vmstat, netstat -in, etc - I graph stuff on munin but munin's granularity is ~5 minutes and not near enough to see transient events. This'll show things like context switch increases, syscall count increases, traffic/packet rate increases, etc, which may be an aide in tracking down what is going on. Adrian -- - Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid Support - - $25/pm entry-level VPSes w/ capped bandwidth charges available in WA -