RE: SMON taking 50% of CPU and certain queries hanging

Sam,

Can you check if PQ is enabled (via PARALLEL_* ) and you have PDML/PQ in use because of DB objects or queries? If so, the you might be overwhelming the number of CPUs in the system via too many PQs/PQ servers. If the key word is 'upgraded a test server' as in an OS upgrade on AIX, then you should check if you have lost previous values of AIO (configured via SMIT AIO).

John Kanagaraj
Oracle Applications DBA
DBSoft Inc
(W): 408-970-7002

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• The opinions and statements above are entirely my own and not those of my employer or clients **

> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Sent: Monday, June 23, 2003 4:49 AM
> To: Multiple recipients of list ORACLE-L
> Subject: SMON taking 50% of CPU and certain queries hanging
>
>
> I recently upgraded a test server and found out today that it was
> hanging. SQLPLUS etc...
> I checked alert log and found following errors
> WARNING: aiowait timed out 1 times
> WARNING: aiowait timed out 2 times
>
> I shutdown and restarted and since then Ive noticed that only
> certain queries hang and the SMON process is running at 50% CPU.
>
> This Test service has been running for ages, allthough I did do an
> upgrade to the Application a week ago.
>
> Its the end of day so I will leave it running and see if SMON
> finishes.
> Ive checked space etc..checked metalink briefly but if any of you
> can give me some suggestions I will try them.
>
> thanks
>
> Sam
>
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-- 
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-- 
Author: John Kanagaraj
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