For the love of yum!
God help me, I run fedora 8 on my laptop and lately it has started slowing right down every now and then. The only thing I could put my finger on was that every time it slowed down, my machine was displaying "X Updates Available" and I had yum-updatesd-he at the top of top using a crap load ( > 50%) of CPU and over 400MB of memory...
Now, being the troubleshooting kinda guy I am, I immediately assumed that the yum auto update notifier was slowing my system down. Now, as I run yum update on a regular basis, I could rest assured that I didnt need to be notified of when there were updates available.
So, after a quick search, I found a thread on the Fedora Forum which helped a lot. So, after a quick read, I disabled the yum update notifier from starting on bootup with a simple;
$ chkconfig yum-updatesd off
And stopped the running service with a nice
$ service yum-updatesd stop
Ahhhh... Now my laptop seems to be coping again! Thanks Fedora Forum! 
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