[RAC 11gR2] stress tool

I was charged to stress a 3-nodes 11gR2 RAC database last week. I have tried many approaches in order to detect the "breakpoint" but I failed.

I never reached this limit and thus, I could not conclude anything about the current setup.

This is the first time I try to "benchmark" a 11gR2 RAC database and I must confess, I have no idea how to break it down.

What tool could I use to reach the breakpoint ? What method would you use to do so ?

The nodes are all like this: HP-UX 11iv3 - 8 cores - 16G RAM. 10Gb interlink (UDP).

Thank you very much

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XMA