Re: top info

[Paul Brook <paul@codesourcery.com>]

On Sunday 30 May 2004 16:58, Corin Langosch wrote:
> Hi,
>
> i'm now sucessfully running our mysql-server with debian
> pure64 for two days :-). when running top the summary output
> is something like this:
>
> --
> top - 17:53:43 up 2 days, 43 min,  1 user,  load average: 0.31, 0.77, 0.70
> Tasks: 212 total,   1 running, 211 sleeping,   0 stopped,   0 zombie
>  Cpu0 :  7.8% us,  4.9% sy,  0.0% ni, 68.6% id, 18.6% wa,  0.0% hi,  0.0%
> si Cpu1 :  9.0% us,  3.0% sy,  0.0% ni, 57.0% id, 31.0% wa,  0.0% hi,  0.0%
> si Mem:   4068456k total,  4052936k used,    15520k free,    98372k buffers
> Swap:  2077704k total,        0k used,  2077704k free,  2761232k cached --
> 'us' means user, 'sy' means system, 'id' means idle, but what does
> 'ni','hi', 'si' and especially 'wa' mean? i see that most often 'wa' has
> relatively high values.

ni = nice
hi = ? Probably hard interrupt
si = ? Probably soft interrupt
wa = IO wait

wa typically has high values if the machine is waiting to IO to complete, 
doesn't have anything else to do.

IIRC the more detailed split was introduced in 2.5/6 kernels, and is not amd64 
specific.

Paul