AIX

folks,

I have dev box which is runnin SAP apps and the hdisk0 usage activity is showing up 100% using topas .

Please chk the o/p below:

Topas Monitor for host: dev_sap_basis EVENTS/QUEUES FILE/TTY
Sat Nov 29 05:32:58 2008 Interval: 2 Cswitch 11913 Readch .
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Network KBPS I-Pack O-Pack KB-In KB-Out
en0 1.0 0.5 1.0 0.0 1.0 PAGING MEMORY
lo0 0.8 8.5 8.5 0.4 0.4 Faults 8229 Real,MB 8192
en1 0.3 2.0 2.0 0.1 0.2 Steals 1281 % Comp 96.2
PgspIn 1002 % Noncomp 1.6

Disk Busy% KBPS TPS KB-Read KB-Writ PgspOut 728 % Client 1.9
hdisk0 100.0 6024.0 1091.5 3110.0 2914.0 PageIn 799
hdisk13 82.5 20.5K 1314.0 20.5K 0.0 PageOut 731 PAGING SPACE
hdisk2 41.0 1050.0 70.0 1050.0 0.0 Sios 1504 Size,MB 20480

can anyone suggest the what I can do to make sure that the usage is minimal?

FYI, the application running has no issues as stated by the app team ?

regards,

nivas p

1.) Post the output of "vmstat 1 10" at these peak times.
2.) Is some data being used by your application placed on hdisk0? If yes, place this on other non busy disks. Application data usually has not be placed on the OS disks.
3.) Does your application or DB use Asynchronous I/O (AIO)?
4.) Show the output of "lsdev -C| grep -i aio".
5.) Show the output of "lspv| grep hdisk0".
6.) Show the output of "oslevel -s" or "oslevel -r"
7.) Show the output of "vmstat -v| tail -5"
8.) Post the answers here, get a coffee and wait for us to check.

Issue has been escalated to app team and they have put the solution in t his way

" Intensive user created background job was scheduled every 5mins -- removed the mentioned job.".. really not sure what he means !!!!!!!!
any idea what he means by intensive user ... is it some kinda d/f user created in AIX.....

BTW, what does this disp+wor does, why is it takin so much space and whn I grep it in ps -ef , it doesnt show ... what is it ???????
nivas p

If you really want help, it could be helpful for you to answer my questions at first.

I don't know what this means.

In your first post you showed problems with traffic on disks, nothing with "space" problems in it. "space" problems should be solved on your own.

Means some user has written a job and it was running every 5 minutes causing some trouble - so the admin removed the job. Ask the admin which user and which job to get enlightend maybe.
Can't explain it better, maybe look up the words in some dictionary.