Iain Buchanan <iaindb <at> netspace.net.au> writes:

> is there a top-like utility that can tell me what processes are doing
> the most disk reads/writes?


bonnie and bonnie++ might help

eix bonnie


> Sometimes my disk will go crazy, and my system slow down.  I usually
> know its updatedb, or something similar, but sometimes I have no idea
> why.


Lots of possibilities on these sort of questions. There is a fantastic
network monitoring tool that monitors all sorts of system performance
issues, call 'jffnms'. It's in portage, but, masked at the moment. It's
a bit daunting to get happy, but well worth the effort.  I'm waiting
for it to stablize on gentoo. It was very difficult to get happy under
debian, the last time I hacked at it for a client.


http://dev.gentoo.org/~angusyoung/docs/jffnms/docs/jffnms.html

hth,
James

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