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#1 (**permalink**) 01-12-2008, 05:10 AM

I have seen similar vmstat output in the past. Though everything seemed
flying, I added two extra CPU's and reduce the load to 20% instead. Since CS
was very high, I think it could be just because too many clients and large
wait on IO (any output from iostat?), in which case CPU time would increase,
but really wasn't doing anything.

Weblogic has performance tuning tools built-in which should give you some
idea from a JVM perspective.

Charles

"Matty" <mattycruft@daemons.net> wrote in message
news

an.2003.06.04.11.49.46.510278@daemons.net...
> I am trying to figure out what is causing an application (weblogic) to
> comsume a great deal of CPU resources. The server is a 480R
> with 2 CPUs and 4 GB of memory. The vmstat output shows a large amount
> of userland CPU activity, and it may well be that the application is
> CPU bound. I am curious if anyone has any thoughts on the CPU statistics?
> It looks like vmstat shows the number of runnables processes. Is there
> a way to determine the number of kernel threads waiting to run? The
> vmstat output gets worse (higher # of syscalls, addtional context
> switches, id = 0, and us CPu loads = 90 - 95%) with more users on the
system.
>
> Thanks for any insight,
> - Matty
>
> r b w swap free re mf pi po fr de sr m0 m1 m3 m1 in sy cs us sy
id
> 0 0 0 6643728 2949200 4 41 0 13 13 0 0 1 0 0 1 536 1802 1542 42
2 56
> 0 0 0 6648120 2956904 0 6 0 0 0 0 0 0 0 0 0 592 2969 2420 18
2 80
> 0 0 0 6648112 2956808 0 1 0 0 0 0 0 0 0 0 0 563 3506 3392 14
1 85
> 0 0 0 6648112 2956760 0 6 0 0 0 0 0 0 0 0 0 641 5658 2719 29
3 68
> 0 0 0 6645000 2955800 55 366 0 59 59 0 0 1 0 0 1 555 27673 3683 59
11 31
> 1 0 0 6641312 2942680 648 1141 0 34 34 0 0 2 0 0 2 1168 24539 4147 78
10 11
> 1 0 0 6641656 2946952 628 940 0 5 5 0 0 1 0 0 1 595 15769 3900 63
9 27
> 1 0 0 6635216 2943256 715 1824 0 198 198 0 0 2 0 0 2 613 34419 2288 65
9 26
> 2 0 0 6635664 2937496 6 155 0 16 16 0 0 1 0 0 1 785 3388 2287 63
3 33
> 0 0 0 6648016 2955944 0 0 0 0 0 0 0 0 0 0 0 574 3952 3690 10
2 89
> 0 0 0 6648008 2955920 0 1 0 0 0 0 0 0 0 0 0 529 2110 1852 10
2 88
> 0 0 0 6648008 2955904 0 0 0 0 0 0 0 0 0 0 0 520 1114 1071 5
1 94
> 0 0 0 6648008 2955896 0 1 0 0 0 0 0 0 0 0 0 553 2752 2175 13
2 84
> 0 0 0 6577712 2955664 42 316 0 10 10 0 0 1 0 0 1 588 25903 3919 46
8 46
> 1 0 0 6641504 2942376 621 876 0 0 0 0 0 0 0 0 0 768 22714 7869 72
14 14
> 1 0 0 6641840 2950584 671 1203 0 117 117 0 0 1 0 0 1 843 31916 7286 80
12 7
> 1 0 0 6640016 2939992 10 53 0 22 22 0 0 1 0 0 1 977 26311 3318 85
10 6
> 2 0 0 6574392 2946248 742 1698 0 292 292 0 0 3 0 0 3 949 37431 2794 86
12 2
> 1 0 0 6609872 2911144 644 1461 0 14 14 0 0 2 0 0 2 669 12551 4151 89
11 0
>
>
> r b w swap free re mf pi po fr de sr m0 m1 m3 m1 in sy cs us
sy id
> 2 0 0 6631800 2933736 667 1218 0 56 56 0 0 3 0 0 3 917 26737 10218 58
8 34
> 0 0 0 6642456 2949728 0 1 0 0 0 0 0 0 0 0 0 513 1772 1607 13
1 86
> 0 0 0 6642456 2949720 0 0 0 0 0 0 0 1 0 0 1 456 1166 1171 10
1 89
> 0 0 0 6642456 2949720 0 0 0 0 0 0 0 0 0 0 0 539 2817 2330 15
1 84
> 0 0 0 6642456 2949696 0 1 0 0 0 0 0 0 0 0 0 751 4212 3478 24
3 73
> 0 0 0 6642456 2949688 0 1 0 0 0 0 0 0 0 0 0 441 1462 1401 19
1 80
> 0 0 0 6642416 2949664 0 0 0 0 0 0 0 0 0 0 0 815 5244 3912 29
5 66
> 0 0 0 6642384 2949632 0 3 0 0 0 0 0 0 0 0 0 894 5892 4510 34
4 62
> 0 0 0 6642416 2949640 0 2 0 0 0 0 0 0 0 0 0 537 1647 1636 11
1 88
> 0 0 0 6642384 2949608 0 3 0 0 0 0 0 1 0 0 1 451 2079 1971 15
1 84
> 0 0 0 6642328 2949560 0 5 0 0 0 0 0 0 0 0 0 641 3280 2886 21
3 76
> 0 0 0 6642320 2949552 0 0 0 0 0 0 0 1 0 0 1 473 2391 1809 16
2 82
> 0 0 0 6642320 2949544 0 1 0 0 0 0 0 0 0 0 0 842 4551 3373 25
3 72
> 0 0 0 6642320 2949536 0 2 0 0 0 0 0 0 0 0 0 733 5476 3372 18
4 77
> 0 0 0 6642320 2949512 18 84 0 156 156 0 0 3 0 0 3 652 28612 3825 56
12 32
> 2 0 0 6623056 2920400 664 1161 0 13 13 0 0 1 0 0 1 839 10574 2749 84
10 6
> 0 0 0 6626632 2924200 679 1248 0 152 152 0 0 3 0 0 3 673 18981 4466 66
6 28
> 0 0 0 6642296 2949184 0 1 0 0 0 0 0 0 0 0 0 444 1001 982 9
2 89
> 0 0 0 6642296 2949144 0 3 0 0 0 0 0 0 0 0 0 881 3978 3055 31
3 66
>
>
> r b w swap free re mf pi po fr de sr m0 m1 m3 m1 in sy cs us
sy id
> 0 0 0 6642000 2948488 29 1 0 0 0 0 0 0 0 0 0 582 1689 1321 7
1 92
> 0 0 0 6642000 2948976 7 0 0 0 0 0 0 0 0 0 0 456 1060 992 17
1 82
> 0 0 0 6642000 2949088 25 0 0 0 0 0 0 0 0 0 0 565 2016 1744 7
1 92
> 0 0 0 6642000 2949776 9 2 0 0 0 0 0 0 0 0 0 541 2608 2431 10
2 88
> 1 0 0 6629112 2938040 661 1190 0 14 14 0 0 3 0 0 3 914 27611 4919 63
13 24
> 0 0 0 6630216 2932272 682 1292 0 144 144 0 0 2 0 0 2 566 18842 3140 50
5 45
> 0 0 0 6641968 2949512 0 0 0 0 0 0 0 0 0 0 0 488 1014 997 16
2 82
> 0 0 0 6641968 2949504 0 1 0 0 0 0 0 0 0 0 0 613 2885 2171 11
2 86
> 0 0 0 6641968 2949480 0 3 0 5 5 0 0 1 0 0 1 579 13677 3722 38
8 54
> 0 0 0 6635528 2940240 660 1187 0 6 6 0 0 1 0 0 1 637 16542 2087 27
5 68
>
>

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Re: vmstat output (high CPU loads)