TOP shows above 100% WCPU usage
Dan Nelson
dnelson at allantgroup.com
Tue Aug 15 17:27:31 UTC 2006
In the last episode (Aug 15), Mike Jakubik said:
> 35 processes: 7 running, 28 sleeping
> CPU states: 58.1% user, 0.0% nice, 38.4% system, 1.1% interrupt, 2.4% idle
> Mem: 642M Active, 416M Inact, 125M Wired, 112M Buf, 825M Free
> Swap: 4071M Total, 4071M Free
>
> PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> 465 mysql 18 20 0 905M 641M kserel 0 39:18 160.64% mysqld
> 631 root 1 96 0 2424K 1668K CPU1 0 0:02 0.00% top
>
> How can mysql use 160%? Is this a reporting bug in top because mysql is
> threaded?
You have multiple CPUs, so a threaded process can theoretically reach
100*ncpus cpu usage.
--
Dan Nelson
dnelson at allantgroup.com
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