Comment 15 for bug 155244

This helped for me:
Gedit ~/.config/tracker/tracker.cfg and search for vision.
Duplicate the line and insert a "i" (seems to be a typo) to the second line:
old: "Dvisions=4"
new: "Divisions=4"

After this change wait some time (e.g. 1 minute).
So the ~/.cache/tracker/*tmp* files are dissappeared
and the load is back to normal.

I found this at: http://forum.ubuntuusers.de/topic/133555