load uptime

[Maxim Rozin]

i have 2 servers (n class),
with 1 and 2 cpus and 11i
in glance they look fine (cpu,disk and mem util)
but the load avarge on one of them is about 5.
and on the other is 0.8

what can be the reason for this??

[G. Vrijhoeven]

Hi,

More load on one server, now or in the past.
I Do not know exactly how load is composed, but it is a combination of cpu, i/o averages, since the server was last booted.

HTH,

Gideon

[Maxim Rozin]

there ia more load on on of the servers now and in the past.

all the other parameters on the server looks fine.

[Victor Fridyev]

I guess, you have load average 5 on the server with 1 CPU and 0.8 on the second (with 2 CPUs) ?
What is difference between applications which run on both computers ?

[Ravi_8]

Hi,

Load average depends on the type of application you are running and the machine h/w config.
if the applications are same on both the machines then machine with 2 CPU will be less loaded as the work is shared by 2 processors.

[Wim Rombauts]

What you see is "normal", that means : it should not be, but the fact is that a 1-CPU system shows a much higher load than a 2-CPU system and HP doesn't now themselves why that is.

I have exactly the same situation : a 1-CPU system and a 2-CPU system. The 2-CPU system is much more busy (idle% CPU is rarely ABOVE 80%) than the 1-CPU system (idle% CPU is rarely BELOW 90%). Every process on the 1-CPU system is also running on the 2-CPU system - so it has nothing to do with the kind of software I run on those systems, and the 2-CPU system is running additional applications. Both systems are on the same patch level, and share the same hardware configuration.

A difference in load of 0.8 for the 2-CPU system and 1.2 for the 1-CPU system would seem normal to mee, but the difference you (and I) have seems out of range.

I opened a software support call for this, but after a few months they still haven't found the answer.

[Ted Buis]

Per Bob Sauer's book HP-UX 11i Performance and Tuning, the load average is per CPU for SMP machines. Also, it is the run queue plus "fast sleepers" that make up the number, not just the run queue.

[Robert-Jan Goossens]

Hi,

Check this doc,

Why is load average so high?
Document id: KBRC00014390

http://www4.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000072805521

Regards,
Robert-Jan