Swap with 16 Gb of RAM

Vsevolod Ilyushchenko simonf at cshl.org
Tue Aug 21 10:35:01 CDT 2001


Thanks a lot for your answer!

> Yes, this is a known issue, which is being resolved only now in the latest
> 2.4.8 and 2.4.9 kernels.  The recommended amount of swap is 2x RAM, or in
> your case, 32GB.  But, you can't actually *have* that much swap in the Red
> Hat Linux 7.1 release, as you're limited to 8 swap spaces (files or
> partitions) of 2047MB each.

Is swap file faster than partition or vice versa?

> The virtual memory subsystem has undergone a lot of changes in the 2.4.x
> series.  2.4.8-ac(high-number) and/or 2.4.9 should be much better about
> needing less swap, freeing no-longer-used pages from swap, and making better
> use of available RAM.  If you like, you can try building a
> 2.4.8-ac(high-number) kernel that may perform better for you.  Or, you can
> wait until Red Hat releases an errata kernel for 7.1 which may improve your
> performance.

I have just compiled 2.4.8 a few days ago. Would you recommend going with
2.4.9 or ac kernels?

|       x |   Simon (Vsevolod ILyushchenko)   simonf at cshl.org   
| y = e   |                                    
|_________|   http://www.simonf.com          simonf at simonf.com 
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