Missing %CPU time from prstat compared to sar -u/vmstat
We encountered a very weird problem whereby the %CPU in prstat is very different from the %usr + %sys + %wio in sar -u command or the %usr + %sys in vmstat command.
Further checking on the sar -u report shows that 65% of the CPU is utilized even though during the non-peak hours. When we compared it with the prstat, we could not find any processes with high CPU utilization.
Please help to solve this weird problem.
Please refer report at below.
prstat command report
Sat Jul 1 00:10:00 WIT 2006
PID USERNAME SIZERSS STATE PRI NICETIME CPU PROCESS/NLWP
25339 root1080K 776K run000:00:00 0.1% sh/1
25336 root1080K 776K sleep100:00:00 0.1% sh/1
15842 root1274M 885M sleep29102:38:16 0.1% java/65
25326 root1080K 776K sleep2100:00:00 0.0% sh/1
25358 root1568K 1280K cpu1000:00:00 0.0% prstat/1
25356 srsnet3368K 1664K cpu0000:00:00 0.0% cron/1
187 root2296K 1136K run000:01:43 0.0% cron/1
25331 root1080K 720K sleep000:00:00 0.0% sh/1
28966 root178M68M sleep29100:04:46 0.0% java/44
25346 root1088K 688K sleep000:00:00 0.0% tail/1
Total: 72 processes, 599 lwps, load averages: 0.02, 0.12, 0.12
Sat Jul 1 00:20:00 WIT 2006
PID USERNAME SIZERSS STATE PRI NICETIME CPU PROCESS/NLWP
17591 root1328M 978M sleep2910 11:16:32 0.1% java/99
25825 srsnet1080K 784K sleep020:00:00 0.1% sh/1
25820 root1080K 776K sleep000:00:00 0.1% sh/1
15842 root1274M 885M sleep29102:38:17 0.1% java/65
17177 root1335M 1195M sleep2910 29:56:24 0.1% java/104
28966 root178M68M sleep29100:04:46 0.0% java/44
25824 root1080K 776K sleep000:00:00 0.0% sh/1
187 root2296K 1136K sleep000:01:43 0.0% cron/1
25831 root1552K 1264K cpu1000:00:00 0.0% prstat/1
28737 root200M86M sleep29100:07:07 0.0% java/56
Total: 61 processes, 596 lwps, load averages: 0.02, 0.12, 0.13
Sar command Report
Sat Jul 1 00:05:00 WIT 2006
SunOS DCWEBFES01 5.9 Generic_117171-05 sun4u07/01/2006
00:05:00%usr%sys%wio%idle
00:05:01643600
00:05:02871300
00:05:0395500
00:05:0492800
00:05:0593700
00:05:0695500
00:05:07624034
00:05:09104086
00:05:1012097
00:05:1121196
Average609031
Sat Jul 1 00:15:00 WIT 2006
SunOS DCWEBFES01 5.9 Generic_117171-05 sun4u07/01/2006
00:15:00%usr%sys%wio%idle
00:15:01663400
00:15:02901000
00:15:0393700
00:15:0483908
00:15:0695500
00:15:07891100
00:15:08813016
00:15:0901198
00:15:1001099
00:15:1101099
Average608032
Sat Jul 1 00:25:00 WIT 2006
SunOS DCWEBFES01 5.9 Generic_117171-05 sun4u07/01/2006
00:25:00%usr%sys%wio%idle
00:25:01643600
00:25:02891001
00:25:0393700
00:25:0494303
00:25:0594600
00:25:06901000
00:25:07645031
00:25:0801099
00:25:0901099
00:25:1001099
Average598033
Message was edited by:
ckchongSunSupport
