gstat shows > 100% busy

[Dan Nelson]

In the last episode (Apr 16), Poul-Henning Kamp said:
> In message <42616D77.2070205 at centtech.com>, Eric Anderson writes:
> >> The "ms/r" and "ms/w" give you the time it takes to send a
> >> transaction through (in milliseconds, for read and write
> >> respectively) and those are the numbers you should monitor.
> 
> These on the other hand are what people really care about: how fast
> (or slow) will it be to access the disk.  If you run a disk benchmark
> you will notice that the service time has seismographic sensitivity,
> run a stupid access pattern and it explodes into the 100s of
> milliseconds.
> 
> >Is there a place to grab those stats in a more 'script friendly'
> >way?  I am the author of a (rather cheesy) tool called bsdsar, and
> >I'm thinking about updating it with all the new cool 5.X-isms.
> 
> Go for it.  There is a pretty simple API to pull it out of the
> kernel, check the gstat source.

Also see the devstat manpage and the source to iostat.

-- 
	Dan Nelson
	dnelson at allantgroup.com