yum update took 99.99% of cpu

[Michael Schwendt]

On Fri, 27 Jun 2014 17:02:20 -0600, JD wrote:

> FC20.
> 
> I ran yum -y update.
> After all the files were downloaded, the delta processing started. From
> there on, all the way through to the end of
> installation and cleanup, cpu was 99.99% taken up
> by the update process, and the entire desktop became
> unresponsive. I was unable to switch display windows,
> of which I had 6.
> 
> The update had downloaded a total of 161MB, for a total
> of about 30 updates, most of them wine related.
> 
> The machine is a dual core Intel running at 2.4GHz,
> with 4GB ram.

CPU speed and 99% usage shouldn't be the problem here.
Rather a bottleneck related to massive I/O and slow storage?
Or an odd case of heavy memory usage that lead to swapping.