> On Sat, Apr 07, 2001 at 02:49:25PM +0200, wojtek@wojtek.3miasto.net wrote:
> > 
> > it looks like mfs never give it's memory/swap used back when deleting
> > files.
> > could it be changed?
> 
> You would have to change MFS to something else then :)

i turned mfs off.

> MFS is really a FFS in pageable memory. memory to hold the filesystem
> is allocated at mount time.
> Now there is different way to accomplish this. For example solaris's swapfs
> put files directly in pageable memory, which is allocated dynamically.
> The consequence is that writing a file can fail, because there's not
> enouth VM available. At last with our MFS the VM is reserved at mount time :)
but after creating 80MB file when there is 80MB free memory, deleting it
THEN it needs to swap out this 80MB when you use this memory for programs.
for me - nonsense