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CPU_COUNT VS parallel_threads_per_cpu

edited Jul 11, 2016 4:35AM in Database Administration (MOSC) 3 commentsAnswered

Hi,

we have a single instance database 11.2.0.4 installed on a Physical Server with 2 socket (CPUs), each CPU has 4 Cores each Core has 2 Threads. So my question is it right that Oracle read the Value 16 for the Parameter cpu_count or it should be 8?

I'm asking that because in Doc Oracle says:

PARALLEL_MAX_SERVERS = (CPU_COUNT x PARALLEL_THREADS_PER_CPU x (2 if PGA_AGGREGATE_TARGET > 0; otherwise 1) x 5)

and this is the default, so in this case the stmt is able to run parallel with 16*2*2*5 = 320, because PGA_AGGREGATE_TARGET = 160G, sure its not like that.

which value would you recommend for

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