Re: Swap Space
- From: David Robillard <david.robillard@xxxxxxxxx>
- To: Bill Zakrzewski <bill@xxxxxxxxxxxx>
- Date: Fri, 26 Mar 2010 11:22:39 -0400
Hi Bill,
> I am installing Oracle 10.2.0.4.0 on a linux server running RH 5.x with 18gb
> of memory. According to the Oracle install guide it recommends a swap space
> equal to total memory or 18gb. Does it really require swap space of 18gb?
> If I allocate less space for swap (say 8gb), will that have any adverse
> effects?
Take a look at RedHat's Recommended System Swap Space:
http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.4/html/Deployment_Guide/ch-swapspace.html
That being said, with today's enterprise disks at 146 GB and more plus
SAN & NAS storage, I'm not sure why one would not want to use 18 GB
out of 146 GB for swap?
I would suggest that you dedicate a first pair of mirrored local disks
for the OS and another seperate pair of mirrored local disks for swap
and a /var/crash partition of at least your (memory + swap + /tmp)
size. That way you're 100% sure to get a valid vmcore file if your
system has to dump one (which I hope it never has to :)
See "How do I configure kexec/kdump on Red Hat Enterprise Linux 5?" at:
http://kbase.redhat.com/faq/docs/DOC-6039
HTH,
David
--
David Robillard
UNIX team leader & Oracle DBA
CISSP, RHCE, SCSA & SCSECA
Notarius
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