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CPU load

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System Unix
Frequent Advisor

CPU load

Hi,
We have a superdome with 128 cpus in which 96 are active.OS version is 11.31. when issueing the command uptime we see 1.34 1.20 1.20, while in glance ( v4.60) we see total cpu utilization ( in the upper bar) of cpu is 86% .
my question is how come that the overall cpu usage is less then 100% and yet the the load is more then 1.

thanks,
Reuven
Reuven
3 REPLIES
James R. Ferguson
Acclaimed Contributor
Solution

Re: CPU load

Hi Reuven:

You don't offer the value for you your glance sample/refresh time. I assume that you are running it at 5-10 seconds. The first of the three 'uptime' values is a one-minute average, so that says that the *average* queue depth during the last 60-seconds was ~ 1.34. It ia quite poasible that during the current few second interval this has dropped to ~ 0.86. I don't consider this significantly different in this context.

Regards!

...JRF...
Dennis Handly
Acclaimed Contributor

Re: CPU load

uptime(1) and CPU percentage measure completely different things. If you have a valid percentage, ignore the bogus/useless uptime.
uptime measures the run queue length. This may be long if lots of processes are continually being created.
System Unix
Frequent Advisor

Re: CPU load

thanks,
Reuven
Reuven