RE: Hugepages - benefits / drawbacks

I agree with Mark. Whenever possible, use huge pages. The only thing I can think of is that, on some architectures, huge page page size is huge!, literally.

This is Itanium:

$ uname -i

ia64
$ grep -i hugepage /proc/meminfo

HugePages_Total:     0
HugePages_Free:      0

The previous DBA setting up the server and database didn't use huge pages. I don't know if he was unaware of it or was afraid of the big page size. Generally, huge pages should use 2M page size. On these Itanium boxes, we frequently see memory shortage, and have to kill MMON and/or PZ9? processes to temporarily solve the problem.

Yong Huang       

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