hi,
after upgrading to 9.2-betat2 (from 9.1-stable), it seems zpool iostat n is
not giving a real picture. Running iostat gives a different picture.
My suspicion got triggerd by a very repetitive output from zpool iostat:
zpool iostat h 5
capacity operations bandwidth
pool alloc free read write read write
---------- ----- ----- ----- ----- ----- -----
h 26.7T 5.84T 9 214 722K 10.9M
h 26.7T 5.84T 12 60 514K 2.90M
h 26.7T 5.84T 9 214 721K 10.9M
h 26.7T 5.84T 9 214 722K 10.9M
h 26.7T 5.84T 9 214 722K 10.9M
h 26.7T 5.84T 9 214 722K 10.9M
h 26.7T 5.84T 9 214 722K 10.9M
h 26.7T 5.84T 9 214 722K 10.9M
h 26.7T 5.84T 9 214 722K 10.9M
h 26.7T 5.84T 9 214 722K 10.9M
h 26.7T 5.84T 9 214 723K 10.9M
while at the same time:
iostat mfid1 5
tty mfid1 cpu
tin tout KB/t tps MB/s us ni sy in id
0 18 53.17 224 11.62 0 0 7 1 92
0 80 60.16 211 12.38 1 0 10 1 88
0 9 44.36 97 4.20 1 0 11 1 87
0 20 34.85 134 4.55 1 0 11 1 87
0 20 23.67 196 4.52 1 0 10 1 88
0 9 71.10 159 11.05 1 0 12 1 86
0 9 51.47 89 4.46 1 0 10 2 88
0 166 43.40 104 4.41 1 0 10 1 88
0 12 42.47 99 4.11 1 0 10 1 88
0 30 57.82 196 11.05 1 0 11 1 87
0 20 30.07 176 5.18 1 0 14 2 84
0 20 27.34 171 4.56 1 0 12 2 86
0 20 26.20 179 4.57 1 0 12 2 86
0 20 66.01 224 14.42 1 0 12 1 86
0 20 30.82 145 4.35 1 0 7 1 91
0 30 29.81 167 4.85 1 0 8 1 90
0 20 31.50 165 5.08 1 0 9 1 89
0 20 53.95 253 13.33 1 0 10 2 87
0 20 29.30 148 4.23 1 0 11 1 88
the 5 sec interval seems to be more of a 'suggestion' :-)
and another thing, hitting ^T usually gives:
load: 4.18 cmd: zpool 32267 [spa_namespace_lock] 58.64r 0.00u 0.01s 0% 3080k