Re: memory related problems

  • From: Yong Huang <yong321@xxxxxxxxx>
  • To: helter.skelterr@xxxxxxxxx
  • Date: Thu, 18 Feb 2010 09:53:44 -0800 (PST)

> sga_max_size24G
> sga_target 24G
> pre_page_sgaTRUE
> vm.nr_hugepages = 12293
> --limits.conf
> oracle               hard    memlock  25176064
> oracle               soft    memlock  25176064

Your SGA, memlock and hugepage size are too close to each other. For
reason I don't know, sometimes hugepages have to be a little larger than 
SGA. In any case, memlock can be set to very large with no harm. It 
doesn't actually allocate memory as hugepages does.

When you start using srvctl and have a lot of swapping, is HugePages 
used? Check /proc/meminfo. You probably get out of memory error in

You don't another instance on this box including ASM, do you?

Yong Huang


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