HugePages shared memory

Hi there again,

Sorry for this question about hugepages.

Does hugepage allways shared for the SGA memory? Does I don't no need of knowledge about shmax and/proc/meminfo-> shm

cat/proc/meminfo

Shmem: 476 KB

Thanks I m stuck

* T

total max shared memory (KB) = 4611686018427386880... can you convert GB? can you check with your size of ram (deicide if possible or not)

when its comes by default, sles kernel, you have right to set up correctly.

What is the Hugepagesize? I hope its 2 k, then it is mapped with 7680 == 15 GB

(a) If you want to keep 15 GB (you must decide what is best for your environment) every thing is acceptable up to your limit of RAM (opt for 60% of RAM) total

(b) higepage size is 2 k so 15 GB/2 k corresponds to 7680 pages (mapped to vm.nr_hugepages)

(c) Please change SHMMAX and SHMALL correctly (refer to the oracle documentation)

(d) update under settings

(HugePages * Hugepagesize).
== 7680 * 2 k

soft memlock Oracle 15728640

15728640 Oracle hard memlock

It may be useful

-Pavan Kumar N

Tags: Database

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