Re: Poor ZFS performance

2009-05-05 Thread Mel Flynn
On Monday 04 May 2009 02:07:41 nf wrote: > On Sat, May 2, 2009 at 7:22 PM, Frederique Rijsdijk > > wrote: > > nf wrote: > >> 733843456 bytes transferred in 61.124812 secs (12005656 bytes/sec) > > > > That is very low. I get about 60MB/sec in this way. Adding bs=1m it'll go > > up to 240MB/sec even

Re: Poor ZFS performance

2009-05-03 Thread nf
On Sat, May 2, 2009 at 7:22 PM, Frederique Rijsdijk wrote: > nf wrote: >> >> 733843456 bytes transferred in 61.124812 secs (12005656 bytes/sec) > > That is very low. I get about 60MB/sec in this way. Adding bs=1m it'll go up > to 240MB/sec even (raidz1 with 4*1TB). > > Could you show top -S ? I w

Re: Poor ZFS performance

2009-05-02 Thread Frederique Rijsdijk
nf wrote: 733843456 bytes transferred in 61.124812 secs (12005656 bytes/sec) That is very low. I get about 60MB/sec in this way. Adding bs=1m it'll go up to 240MB/sec even (raidz1 with 4*1TB). CPU: 0.4% user, 0.0% nice, 14.3% system, 4.5% interrupt, 80.8% idle Mem: 1950M Active, 868M Ina

Poor ZFS performance

2009-05-01 Thread nf
Hello! I've got a ZFS-based file server running FreeBSD 7.1-STABLE, with two raidz1's of 3 x 500gb. Recently my system has exhibited exceptionally poor performance in a way that confuses me. None of the drives are in a degraded state, and zpool iostat reports typical performance figures, while ac