Jeffrey,

Can you use pview or pviewer from Resource kit to work out which thread is using the 
CPU and which ones get left behind.
Use v$Process to see which threads correspond to which processes.
And tlist will show what the threads were doing last and may shed some light on this.

Stop everything to do with Apps (cman etc) and see if the database still shows the 
same behaviour.
Have you stopped the database service or just the instance - see if stopping the 
service has any effect.

Hope these ideas help,
Bruce Reardon


-----Original Message-----
Sent: Friday, 24 May 2002 0:13

We are running Oracle 8.1.7.3.2 on W2K/NT.  

We have experienced a problem while applying Oracle Apps patches that CPU shot to 100% 
for 4 threads.  The weird part is that the patch had aborted so nothing was running in 
the database.  Bouncing database cleared the problem.  

Continued with more patches and noticed CPU running at 25% with nothing running.  
Again bounced database and back to normal.

Latest item we noticed today is that CPU is normal (less than 5%) with no users but we 
have 40 threads showing in task manager.  Did shutdown immediate and count only went 
down to 30.

Bounced database and now have 12 threads.  If connect / disconnect, I see the count go 
up and then down again.

Looks like Oracle is missing some threads - possibly why during our patching of the 
Oracle Apps we see CPU out of control.

We have a TAR on this but so far Oracle is lost regarding the high CPU.  Especially 
given that don't have it right now.  Hoping the extra threads will point to something.

Jeffrey Beckstrom
Database Administrator
Greater Cleveland Regional Transit Authority
1240 W. 6th Street
Cleveland, Ohio 44113
(216) 781-4204
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Author: Reardon, Bruce (CALBBAY)
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