fabian wrote:
>> 2009/7/5 fabian <fabian@xxxxxxxxxxxxxx>
>>
>>> 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@xxxxxxxxx
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