RPM - runaway rpmq or rebuild rpm db

Runaway rpmq process or need to rebuild rpm db

check if you have some runaway processed from rpmq (usually 100% cpu for a long time):

lsof | grep /var/lib/rpm/

Then kill them one by one.

Lastly, remove the __db* files and rebuild the db:

rm -f /var/lib/rpm/_db*
rpm --rebuilddb -vv

Done.