Poor ZFS performance

[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 Inact, 537M Wired, 238M Cache, 363M Buf, 87M Free
> Swap: 1024M Total, 101M Used, 923M Free, 9% Inuse
> 
>   PID USERNAME  THR PRI NICE   SIZE    RES STATE  C   TIME   WCPU COMMAND
>  8402 nf          1  50    0  4604K   788K zio->i 0   0:03  8.59% dd

Could you show top -S ?


-- Frederique