At Thu, 04 Jan 2001 21:43:36 +0100,
Lars Heidieker wrote:
> 
> Hi,
> 
> it might be that doing memory pageouts --- done to increase the vnode
> cache --- hurt the io,
> and breaking the clustering by that.
> does the same happen if there is plenty of free mem?

Before sending the previous mail, I also tested with a 1.5K kernel
with 100MB of bufcache.  Interestingly, "tar zxf" sometimes ran slower
than it did with 50MB bufcache.  So it might be the case that too much
of free mem hurts performance.
(Beware -- this might be a false indication.  More careful tests are
needed to conclude something.)

--
IWAMOTO Toshihiro