Some comments on ZFS

Gary Jennejohn garyj at
Tue Apr 17 07:58:50 UTC 2007

Thomas Sparrevohn writes:
> On Monday 16 April 2007 20:05:55 Joerg t wrote:
> >
> > I'm also seeing a very odd behavior  regarding  memory consumption,
> > with src and obj under zfs (different filesystems, same pool, compression
> > off) the system begin to wire all memory and swap tops 1GB. Maybe there's
> > something trashing memory on zfs ?
> >
> There is something weird - Just ran same test again to see whether it
> was a fluke - it still take 1h12 - however I saw the oppersite of Joerg.
> The "systat -vm" Freemem was permently on 2,2GB - this on a 4GB
> system that normally shows a 1,2GB - or less after a buildworld.
> hmm. Pawel are there tests that can help? 

After switching from SCHED_ULE to SCHED_4BSD my ``make -j2 buildworld''
completes in about 19 minutes. This is pretty much the same as before the
switch to ZFS.

I have lots of stuff turned off in make.conf so YMMV.

Gary Jennejohn / garyjATjennejohnDOTorg gjATfreebsdDOTorg garyjATdenxDOTde

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