Looking for pointers in troubleshooting -> RAC performance degradation (single instance is fine)

From: Pradeep Chetal <Pradeep.Chetal_at_mformation.com>
Date: Thu, 24 Dec 2009 08:28:51 -0500
Message-ID: <4BF4B618B11C2140B597AA57A1551A84DF82E1_at_mfusemail01.mformation.com>



We have an app that is running well in single instance but when put on a 2-node or 3-node RAC, we see pretty much similar performance. However, if the CPU time is 55-60% in single instance, it becomes 20% in 3-node RAC and top-5 itmed events become..  

"gc buffer busy", "gc current block busy", "enq: TX- index contention  

Any help in what to look for will be greatly appreciated.  


  • Pradeep

Pradeep Chetal
Sr. Director - Infrastructure Architecture

Mformation Technologies Inc.
Switchboard: +1 732 692 6200  

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Received on Thu Dec 24 2009 - 07:28:51 CST

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