fabian wrote: >> 2009/7/5 fabian <fabian at baladia.gov.kw> >> >>> i notced recently that the cpu utilization peaks to abt 100 % at 4 am >>> every day and becomes normall at 10 am >>> >>> >>> cpu 4.5%us 2.3% sy 0.0%ni 2% id 95% wa >>> >>> notice the 95% wa >>> >>> >> It looks like you might be misreading the idle % for CPU activity. A 95% >> idle shows the system is not doing much. >> > > so sorry abouyt my typing > > its cpu==>4.5%us > sy==> 2.3% > ni==> 0.0% > id==> 2 % > wa==> 95% > > > so the wa=95 % > > this starts about 4 am and stops about 10 am > then the CPU idle time is always between 90% to 99% Wait means the kernel is waiting for some device i/o command(s) to complete. The CPU is idle but can't do anything useful without the results from the device, probably disk or network. Starting at 4 am makes the 'updatedb'run that builds the database for the locate command a likely culprit. Do you have a lot of files, slow disks, or perhaps some network mounts that are included? -- Les Mikesell lesmikesell at gmail.com