Some comments on ZFS
Pawel Jakub Dawidek
pjd at FreeBSD.org
Tue Apr 17 00:11:19 UTC 2007
On Mon, Apr 16, 2007 at 08:21:51PM +0100, Thomas Sparrevohn wrote:
> 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?
You results are quite surprising. In my tests:
CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (2992.72-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf43 Stepping = 3
Logical CPUs per core: 2
real memory = 1065242624 (1015 MB)
avail memory = 1032900608 (985 MB)
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
Doing 'make -j4 buildworld':
3335,72 real 3999,41 user 522,16 sys
3604,06 real 3943,14 user 923,60 sys
3531,34 real 3971,61 user 927,56 sys
Both src/ and obj/ were on the same file system.
Pawel Jakub Dawidek http://www.wheel.pl
pjd at FreeBSD.org http://www.FreeBSD.org
FreeBSD committer Am I Evil? Yes, I Am!
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