posted Feb 2, 2012, 5:06 PM by Sachchida Ojha   [ updated Feb 2, 2012, 5:08 PM ]
Getting good performance out of ASM depends primarily on following guidelines.

1. Optimizing latency by insuring that physical disks are sparsely packed and running below maximum throughput capacity.

2. Providing enough physical devices to support the desired throughput.

3. Avoiding RAID5 for any files subject to non-trivial  write IOs

4. Isolating redo, flashback, and archive log IO from datafile IO and possibly isolating temporary datafile IO from permanent datafile IO.