[CentOS] Find reason for heavy load
Christoph Maser
cmr at financial.com
Thu Dec 31 11:51:01 UTC 2009
Am Donnerstag, den 31.12.2009, 12:34 +0100 schrieb Chan Chung Hang
Christopher:
> >> Look at the first two columns. What column have higher numbers? If r,
> >> you're CPU-bound. If b, you're I/O bound.
> >
> > procs -----------memory---------- ---swap-- -----io---- --system--
> > -----cpu------
> > r b swpd free buff cache si so bi bo in cs us sy id wa st
> > 8 1 3092 131460 100692 833668 0 0 40 21 1 0 4 1 92 2 0
> > 9 1 3092 130708 100700 835016 0 0 578 206 577 1420 32 50 3 15 0
> > 7 1 3092 128324 100716 836148 0 0 546 2866 594 1465 31 44 7 18 0
> > 4 1 3092 126860 100724 837268 0 0 540 256 596 1505 28 43 6 23 0
> > 7 2 3092 125600 100740 838564 0 0 620 234 661 1442 30 41 2 26 0
> > 5 1 3092 124028 100756 839752 0 0 570 2692 635 1430 24 45 6 25 0
> > 6 0 3092 122040 100784 840964 0 0 584 1464 682 1434 27 44 2 28 0
> > 6 1 3092 120588 100792 842232 0 0 602 278 624 1562 32 46 2 20 0
> > 2 3 3092 120556 100840 843064 0 0 440 2908 603 1299 22 35 6 37 0
> > 3 1 3092 119832 100876 844088 0 0 430 1104 605 1348 23 36 1 40 0
> >
> > According to this, am I correct to conclude that I'm CPU bound and the
> > system is busy doing some unknown processing?
>
> Yes, these figures indicate that you are fairly close to being cpu bound.
Really? 20-30% user and ~40% sys/wait look more like I/O to mee.
Chris
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