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Bad performance but Low CPU loading?

 
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Operating Systems HP-UX Bad performance but Low CPU loading?
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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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LEARN ABOUT X11R4

x11perfcomp

X11PERFCOMP(1)						      General Commands Manual						    X11PERFCOMP(1)

NAME

       x11perfcomp - X11 server performance comparison program

SYNTAX

       x11perfcomp [ -r | -ro ] [ -l label_file ] files

DESCRIPTION

       The  x11perfcomp program merges the output of several x11perf(1) runs into a nice tabular format.  It takes the results in each file, fills
       in any missing test results if necessary, and for each test shows the objects/second rate of each server.  If invoked with the  -r  or  -ro
       options, it shows the relative performance of each server to the first server.

       Normally,  x11perfcomp  uses  the first file specified to determine which specific tests it should report on.  Some (non-DEC :) servers may
       fail to perform all tests.  In this case, x11perfcomp automatically substitutes in a rate of 0.0  objects/second.   Since  the  first  file
       determines  which  tests  to  report  on, this file must contain a superset of the tests reported in the other files, else x11perfcomp will
       fail.

       You can provide an explicit list of tests to report on by using the -l switch to specify a file of labels.  You can create a label file	by
       using the -label option in x11perf.

OPTIONS

       x11perfcomp accepts the options listed below:

       -r	       Specifies that the output should also include relative server performance.

       -ro	       Specifies that the output should include only relative server performance.

       -l label_file   Specifies a label file to use.

X DEFAULTS

       There are no X defaults used by this program.

SEE ALSO

       X(7), x11perf(1)

AUTHORS

       Mark Moraes wrote the original scripts to compare servers.
       Joel McCormack just munged them together a bit.

X Version 11							    x11perf 1.5 						    X11PERFCOMP(1)