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Full Discussion: Analyzing CPU usage
Operating Systems AIX Analyzing CPU usage Post 302567032 by zxmaus on Friday 21st of October 2011 09:56:33 PM
Old 10-21-2011
actually the server has 4 virtual cpus, is entitled to use 3.6 and being p5 that means 8 threads.
To answer your question thoroughly I would like to see some vmstat -Iwt 2 10 outputs from busy timeframes (vmstat is a whole lot better with those options than any other tool I know). From the length of your runqueue I would say double the virtuals which gives you more threads but its easier to say that when the data is taken from really busy systems - and address your IO issues by proper system tuning. You seem to have totally insufficient filesystem buffering. Being on AIX 5.3 I would suggest

Code:
vmo -p -o minperm%=3
vmo -p -o minfree=960
vmo -p -o maxfree=1088
vmo -p -o lru_file_repage=0
vmo -p -o lru_poll_interval=10
ioo -p -o j2_maxPageReadAhead=128
ioo -p -o maxpgahead=16
ioo -p -o j2_maxRandomWrite=32
ioo -p -o maxrandwrt=32
ioo -p -o j2_nBufferPerPagerDevice=1024
ioo -p -o pv_min_pbuf=1024
ioo -p -o numfsbufs=1024

if you still see growing numbers than you can go up to 2048 with numfsbufs - we usually do that
Additionally for a DB box you should set AIXTHREAD_SCOPE=S in /etc/environment

your numbers in the vmstat outputs are huge - how long is your box up ?

And do you mind posting the output of lsattr -El aio0 and iostat -A

And ... be warned - closing one bottleneck in many cases opens another one - it might turn out that your box needs more memory when the IO problems are fixed.

Regards
zxmaus
 

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vdltodmx(1)						      General Commands Manual						       vdltodmx(1)

NAME
vdltodmx - dmx configuration file parser and printer SYNOPSIS
vdltodmx infile outfile DESCRIPTION
vdltodmx reads the input file, which should be in VDL configuration file format. After a successful parse, a file in Xdmx configuration file format is written to the output file. The VDL file format is used with xmovie, which is available from http://www.llnl.gov/icc/lc/img/xmovie/xmovie.html EXAMPLE
Given the following VDL-format file: 0 2 # # 2560 2048 Left two-thirds [restrict=*:2] 2 :2.1 1280 2048 0 0 0 0 :2.2 1280 2048 1280 0 0 0 4 1280 1024 0 0 1280 1024 0 1024 1280 1024 1280 0 1280 1024 1280 1024 # 2560 2048 Right two-thirds [restrict=*:2] 2 :2.2 1280 2048 0 0 0 0 :2.3 1280 2048 1280 0 0 0 4 1280 1024 1280 0 1280 1024 1280 1024 1280 1024 2560 0 1280 1024 2560 1024 the following DMX-format file will be produced: # # virtual "Left two-thirds" 2560x2048 { display :2.1 1280x2048; display :2.2 1280x2048 @1280x0; } # virtual "Right two-thirds" 2560x2048 { display :2.2 1280x2048; display :2.3 1280x2048 @1280x0; } BUGS
If the VDL file is not in the expected format, the program will probably dump core. SEE ALSO
Xdmx(1), xdmxconfig(1), vdl(3), xmovie(1) X Version 11 xorg-server 1.12.4 vdltodmx(1)
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