RE: Interrupt fencing on Sun
- From: "Rob Dempsey" <Rob.Dempsey@xxxxxxxxxx>
- To: "Oracle-L" <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 29 Jan 2008 17:02:24 -0000
Hi
I have encountered this before on a 48 CPU sun machine.
2 CPUs we set aside for network traffic, but this was because the server
was under a heavy network load
Check out (section 12)
http://blogs.sun.com/roller/resources/glennf/fawcett.25kscale.rev1.02.pd
f
Rob
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of fairlie rego
Sent: 21 January 2008 10:34
To: Oracle-L
Subject: Interrupt fencing on Sun
All,
On a 8 node 10.2.0.3 RAC with 128 cpus Sun and Veritas have recommended
that the customer set aside 2 cpus on each node for processing network
interrupts exclusively.
This was suggested after a situation where VCS was unable to process
cluster heartbeat messages in a timely manner due to Sun attempting to
process the network interrupt thread on the same CPU which was running
the cluster communication thread.
I would like to know if any other large customers have set aside cpus
exclusively to handle network interrupts and if so what percentage of
total CPUs
Thanks much
Fairlie
Fairlie Rego
Senior Oracle Consultant
http://el-caro.blogspot.com/
M: +61 402 792 405
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