RE: Interrupt fencing on Sun

From: Shamsudeen, Riyaj <>
Date: Mon, 21 Jan 2008 11:18:04 -0600
Message-ID: <6A4102F59ECFA248B81F7D08F031797801F55EC1@TBDCEXCH01.US.Cingular.Net>

We fenced interrupts also in my prior client, 2 CPUs in a 48 CPU server.  

Do you have 128 CPUs per node or 128 CPU for all nodes together? How many CPUs are used when the system is at its peak load?  


Riyaj Shamsudeen  

[] On Behalf Of fairlie rego Sent: Monday, January 21, 2008 4:34 AM
To: Oracle-L
Subject: Interrupt fencing on Sun  


On a 8 node 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 Rego
Senior Oracle Consultant

M: +61 402 792 405     

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Received on Mon Jan 21 2008 - 11:18:04 CST

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