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Well... My Lap-Top freeze with these problem to. I verify the status of process with the

"ps aux|grep scrollkeeper"

and I note a second line to the complete command process id:

root 6758 70.0 10.9 54696 53068 ? SN 10:28 42:00 scrollkeeper-up
date -q -p /var/lib/scrollkeeper

So... the abusing process is scrollkeeper-update and it's necessary to maintaining the catalog documentation alright.

To solve partially just run:
sudo apt-get install cpulimit
sudo cpulimit -p pid -l %CPU &

Where pid is the "Process id" and %CPU is a number in percentage to limit the process. In my case I type 10. Finally the & is necessary to destiny the running cpulimit in background.

That's all
Fábio Salles