I am new registered user here in this UNIX forums.
I am a new system administrator for AIX 6.1. One of our servers performs poorly every time our application (FINACLE) runs many processes/instances. (see below for topas snapshot)
I use NMON or Topas to monitor the server utilization. I checked the the CPU Idle% and the idle percent is high, however the DISK Busy% is constantly high (during real poor performance, the DISK Busy% is most of the time 100%). Also, I noticed that the FILE/TTY Readch and Writech are constantly high too. See topas snapshot below:
here's our server specs:
Everytime this happens, we try to kill processes that is CPU consuming, but still, the DISK Busy% is high. If we reboot the server, the performance becomes okay, but we can't do this during production. Any suggestion on how to optimize this? is it our architecture (having only 1 hard disk for our data)? Does bottle-necking takes place here? What can we do to optimize our server? Any upgrades shall we make? for example increasing physical memory.
Thank you very much. I hope you can help since I am not a UNIX expert.
Last edited by jim mcnamara; 02-08-2012 at 09:49 AM..
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