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AMM manages the entire memory of the instance with the parameters memory_max_target and memory_target.
ASMM manages only the SGA with sga_max_size and sga_target, PGA you have to manage separately with pga_aggregate_target
also AMM is available only from 11g and ASMM was available from 10g.
923395 wrote:Besides the answer of John, have a read of these two posts which explains that why AMM doesn't use Huge Pages.
I am configuring some systems for huge memory pages on linux and I see in all of the docs that I have read that it says that AMM (automatic memory mgmt) is not compatible with hugepages memory but that ASMM (automatic shared memory mgmt) is compatible with hugepages memory?
I am confused as to the differences between AMM and ASMM? Can someone enlighten me on this subject?
Thanks for the replies, wiish I could give credit to all.