[lkml]   [2003]   [Feb]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: vm issues on sap app server

On Thu, Feb 20, 2003 at 10:21:50AM -0300, Rik van Riel wrote:
> On Thu, 20 Feb 2003, Dejan Muhamedagic wrote:
> > # mem | grep Cache
> > Cached: 4569128 kB
> > SwapCached: 829668 kB
> > ActiveCache: 136728 kB
> The "problem" here is that a lot of the memory in Cached: is
> mapped into process address space, so in effect it is process
> memory.
> This is especially true for executables, libraries and shared
> memory segments, which you REALLY want to have treated as process
> memory and not as cache...
> This makes the Cached statistic a bit confusing for administrators.

Is there a way to split the statistics? It also sounds confusing :)

> > > In that case you're probably familiar with the cache size
> > > tuning, since AIX has the exact same tuning knob as rmap ;)
> >
> > AIX vmtune -P is equivalent to the Linux cache-max, but cache-max
> > is not implemented.
> Doesn't it also have something like the borrow percentage, above
> which AIX will only reclaim from the cache, unless the repaging
> rate of the cache is higher than that of process memory ?

No, not that I'm aware of. You can check the man page for vmtune

BTW, there is also quite a bit of interesting documentation about
the AIX VMM.


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:0.045 / U:24.440 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site