You seem to have timed_statistics=TRUE right ?? in RAC you will ALWAYS see GCS pings ... basically as long as cluster_database=true, even if only one node is running, you will still see Oracle trying to ping other instances.
My guess is that's what is happening ... but I could be very well wrong, I have RAC experience, but never tried to truss the top processes.
Raj
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-----Original Message-----
From: Ravi Kulkarni [mailto:[EMAIL PROTECTED]]
Sent: Thursday, July 10, 2003 12:30 PM
To: Multiple recipients of list ORACLE-L
Subject: RAC system Calls
Hello List,
We are running Benchmark tests on Solaris 2-Node RAC.
Consistently noticed the following :
- Very high Kernel usage (averaging 45%) on TOP
- Statspack has "IPC Send Completion sync" waits (70%
Total ela time)
- On trussing top process, found Oracle to be issuing
huge number of "times" system calls in addition to
read/writes(which I think are select/inserts).
Has anyone noticed this in your environment. I am
guessing these to be inter-instance pings, but could
not get any hits in Doc/Metalink to confirm this.
"times" call is clocking lot of CPU. Is this normal ?
Any pointers would be helpful ? If this is out of
context, is there a separate list for RAC?
Thanks,
Ravi.
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