[lkml]   [2003]   [Feb]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: vm issues on sap app server
On Wed, 19 Feb 2003, Dejan Muhamedagic wrote:

> Both servers swap constantly, but the 2.4.20aa1 at a 10-fold
> higher rate. OTOH, there should be enough memory for
> everything. It seems like both VMs have preference for
> cache. Is it possible to reduce the amount of memory used
> for cache?

Yes, you can reduce the size of the cache above which the
pageout code will only reclaim cache and not application
data. To set the percentage to 10% (from the default 5%):

echo 1 10 > /proc/sys/vm/pagecache

> Finally, there's a third SAP app server, an RS6000 running
> AIX with the same amount of memory, which seems to be more
> stable under various loads.

In that case you're probably familiar with the cache size
tuning, since AIX has the exact same tuning knob as rmap ;)

kind regards,

Engineers don't grow up, they grow sideways.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:33    [W:0.057 / U:25.748 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site