[WBEL-users] Virtual memory tuning?

[William Warren]

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=132155

This is a bug in the RHEL kernel and is a known issue.  U4 is 
supposed to fix this.

It could also be you do not have enough ram in the box.  HOw much 
RAM is in the box and what is the box doing?



Christian Nygaard wrote:

> Hi I'm running a couple of WBEL boxes with many users on them which in 
> turn is running out of memory thus swapping much. Now the impact is that 
> the system only freezes for moments when its swapping out pages to disk, 
> then everything is running fine again. Does anyone know how to tune the 
> kernel so it swaps more constantly/swaps out less pages, so the freeze 
> effect is not so apparent? It runs smooth for long amounts of time, then
> freezes for 10-15 seconds, then runs smooth again and so forth.
> 
> I've tried to fiddle on vm.bdflush and vm.pagecache
> 
> Thankful for any good /proc/sys/vm hints :)
> Chris
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