SUMMARY: CPU idle time in Solaris 8
2007-12-25 3:55:00
Thanks a lot for clarifying. I got lots of responses and very much
thankful to you all. The list is very big but to mention a few:
Darren Dunham
DarrenProg
Bossdad1959
Tristan Ball
Wade A. Lich
David P
Thanks Guys you rules.
Summary is:
Vmstat does not take into account iowait while calculating cpu idle time
where as top and mpstat does. So whenever there is a high iowait, vmstat
and top will show different results.
My Original Question was:
Hi Gurus,
I have a basic question regarding CPU Idle time in Solaris 8. I am
running Solaris 8 on Ultra 10 Box.
When I checked the CPU idle time from top utility it shows 12% idle
which is correct but at the same time if I check it from vmstat utility
it shows 90% idle. Is it normal behavior or some issue with the U10 box?
Any help will be greatly appreciated.
TIA
B
procs memory page disk faults
cpu
r b w swap free re mf pi po fr de sr dd dd f0 m0 in sy cs us
sy id
0 0 0 2212456 185376 65 85 30 0 0 0 0 0 0 0 31 1177 989 408 4
4 91
0 0 0 2212456 184568 34 0 0 0 0 0 0 0 0 0 29 1199 509 389 2
4 94
0 0 0 2212456 183848 45 0 0 0 0 0 0 0 0 0 29 1215 594 395 2
5 93
0 1 0 2212456 182864 68 0 0 0 0 0 0 0 0 0 41 1574 766 489 4
4 91
0 0 0 2212456 181488 63 0 49 0 0 0 0 0 0 0 46 1700 776 524 12
4 84
0 1 0 2212456 180296 58 21 17 0 0 0 0 0 4 0 41 1577 553 478 2
6 92
load averages: 0.20, 0.29, 0.27
16:04:38
78 processes: 75 sleeping, 2 running, 1 on cpu
CPU states: 12.7% idle, 2.0% user, 2.0% kernel, 83.3% iowait, 0.0%
swap
Memory: 1024M real, 163M free, 2048M swap free
PID USERNAME THR PRI NICE SIZE RES STATE TIME CPU COMMAND
10197 oracle 11 58 0 0K 0K sleep 2:45 2.22% oracle
10592 oracle 1 58 0 2168K 1416K cpu 0:01 0.94% top
27087 oracle 1 58 0 0K 0K sleep 1:02 0.54% oracle
5751 oracle 1 58 0 0K 0K sleep 8:23 0.31% oracle
5628 oracle 28 29 10 175M 80M run 9:56 0.16% java
5647 oracle 11 58 0 0K 0K sleep 2:14 0.05% oracle
5745 oracle 1 58 0 0K 0K sleep 3:55 0.04% oracle
5743 oracle 1 58 0 0K 0K sleep 0:35 0.02% oracle
5641 oracle 1 58 0 0K 0K sleep 0:05 0.02% oracle
12306 oracle 11 52 0 0K 0K sleep 7:00 0.01% oracle
2704 oracle 6 58 0 0K 0K sleep 0:58 0.01% tnslsnr
1 root 1 58 0 864K 344K sleep 0:14 0.01% init
5649 oracle 11 59 0 0K 0K sleep 1:43 0.00% oracle
5723 oracle 1 59 0 0K 0K sleep 0:35 0.00% oracle
4641 oracle 13 58 0 0K 0K sleep 64:19 0.00% oracle
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