Messages in this thread | | | Subject | Re: Odd swapping issue | From | Peter Zijlstra <> | Date | Thu, 24 Jul 2008 08:39:25 +0200 |
| |
On Thu, 2008-07-24 at 06:47 +0930, David Newall wrote: > Peter Zijlstra wrote: > > 16g ram on a 32bit kernel is stretching it... may I suggest running a > > 64bit kernel? > > > > Is it? Do we expect that behaviour with so much RAM?
I expect your 32bit machine to go wonky after say 8gb,.. maybe even earlier for some workloads.
The thing is, 32bit machines have less than 1gb of kernel memory - the more memory you have the less of that remains for system duties since such things as the page frame array grow with the number of physical pages present.
Also, all such things as buffer cache reside in that tiny space. At some point the kernel itself is just going to run out of memory trying to manage your machine.
| |