Load

Daniel teletautala at gmail.com
Tue Sep 30 23:35:28 MDT 2008


There is a command in mysql "SHOW FULL PROCESSLIST" which will show
you currently running processes.  This helped me find queries that
needed optimization.

-Daniel

On Tue, Sep 30, 2008 at 9:41 PM, Michael Torrie <torriem at gmail.com> wrote:
> Matthew Walker wrote:
>> On Tue, September 30, 2008 4:57 pm, Michael Torrie wrote:
>>> Not sure what you mean here.  High load normally means the CPU is *not*
>>> being utilized efficiently.  In fact, processes are not running because
>>> they are waiting for stuff.  So a high load often will have a processor
>>> that's nearly idle.  Sometimes a process can cause a high cpu usage and
>>> cause the load average to climb if the process is holding down resources
>>> that other processes are waiting on.
>>>
>>
>> Huh. Maybe I've generally had well designed systems, but my experience has been that if
>> my load average is high, there's too many CPU intensive tasks running, and they're vying
>> for the processor.
>>
>> I can only think of a handful of instances of some other resource being the bottleneck
>> that raised my load average.
>
> Right. I get what you're saying.  For example, if there were too many
> apache worker processes or something.  Worth a look.  Andrew never
> mentioned if his CPU was 100% busy or practically idle (or sitting at
> 75% wait).
>
>
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