Well spoken. If you have a read-mostly app and/or tight node/user
partitioning, you will minimize the necessary communication between
nodes that ensures coherency and coordination. But that necessary
overhead won't and can't go away, so apps can never run faster on RAC
than non-RAC unless something else changes, too (like moving to
Opterons, and so forth).
Mogens
john d parker wrote:
Do you have any degree of parallelism? or is parallel degree set to default?
In general, A well behaved app will perform approx the same on RAC maybe even marginally slower. A poorly behaved app will absolutely stink when moved to RAC. RAC is not a performance enhancing solution.
John
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