Really high iowait in iostat output but not in vmstat.
807567Mar 22 2006 — edited Apr 5 2006Hu Guys,
I'm concerned about a server with Solaris 8 ( on Sun Fire v280 ) which shows a really high iowait time on CPU column and idle value at zero.
Now, if I run a vmstat is show the idle column in zero but the Proc > B column ( blocked process waiting for I/O) really high too.
Do you have any idea about the root cause of this issue ?
Here is the iostat and vmstat output:
# iostat -c 2
cpu
us sy wt id
18 11 71 0
71 11 18 0
66 16 18 0
# vmstat 2
procs memory page disk faults cpu
r b w swap free re mf pi po fr de sr s6 s3 s3 s3 in sy cs us sy id
0 59 0 3469280 808608 274 795 29 15 17 0 5 0 0 27 27 532 2 742 18 11 71
1 1291788160 0 3513024 661832 18 460 0 0 0 0 0 0 0 8 9 588 5015 768 87 6 7
2 1291788269 0 3514688 663088 400 2681 0 0 0 0 0 0 0 23 35 919 6957 1246 61 18 21
Thanks for any suggestion.
Sebastian.