after having tracker-store running with almost 100% CPU, almost all the time for 7 days now, it seems like I found an easy fix:
tracker reset --hard
CAUTION: This process may irreversibly delete data.
Although most content indexed by Tracker can be safely reindexed, it can?t be assured that this is the case for all data. Be aware that you may be incurring in a data loss situation, proceed at your own risk.
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/usr/lib/tracker/tracker-store process is gone for now, fan is spinning down, and everything seems quiet after a week. Haven't tested a reboot though...
