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Bad performance but Low CPU loading?

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Operating Systems HP-UX Bad performance but Low CPU loading?
# 8  
Old 04-26-2010
Methyl would agree, we know not much of this system except it has 2 CPU and seems to run HP-UX 11.11...
I agree with methyl's last post and find the figures quite different from the initial post, I, like methyl would have appreciated the output of the command:
Code:
swapinfo -tam

Do you have batch running evening/night ?

---------- Post updated at 15:13 ---------- Previous update was at 15:07 ----------

What does:
Code:
grep Physi /var/adm/syslog/syslog.log

produce?

For comparison here is the output of my favorite box:
Code:
B3692A GlancePlus C.03.50.00    16:32:44      ant 9000/800                          Current  Avg  High
------------------------------------------------------------------------------------------------------
CPU  Util   S                        SN  NRU       U                                 | 57%   48%   77%
Disk Util   F          F                                                             | 16%   23%   71%
Mem  Util   S            SU             UB    B                                      | 49%   49%   49%
Networkil   U    UR      R                                                           | 19%   19%   19%
------------------------------------------------------------------------------------------------------
                                             PROCESS LIST                                 Users=   14

# 9  
Old 05-01-2010
You say the CPU load is low but according to the CPU summary from the top output you have given us there is not much spare CPU capacity:
Quote:
Code:
Cpu states:
CPU LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS
0 7.23 44.5% 24.0% 22.0% 9.4% 0.0% 0.0% 0.0% 0.0%
1 11.97 38.7% 29.6% 21.3% 10.5% 0.0% 0.0% 0.0% 0.0%
--- ---- ----- ----- ----- ----- ----- ----- ----- -----
avg 9.60 41.6% 26.8% 21.7% 9.9% 0.0% 0.0% 0.0% 0.0%

when you look at the idle columns...

I find running mpstat while a system is busy because it will show if your CPUs are I/O bound.

Adding a "top -b" into a log file in cron can be helpful to see what the resource hungry processes are at that time, where as all the other tools (sar, vmstat, mpstat) show you how busy the system is they don't show what processes are responsible!
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