TRM Database Pruned

The TRM database has been pruned again, making the system much faster and more reliable again.

At about 1930hrs UTC on November 4th the TRM database
was “pruned” again (see the previous time
for more information about this). 
This time we removed all TRMs apart from the ones attached to
MusicBrainz tracks, where the TRM had been looked up at least once. 
This is a slightly more aggressive prune compared to the previous time. 

The TRM database is now about
40% of the size it was before, which (like last time) means that
it now fits easily into the server’s memory, so the server as a whole
runs quickly
and reliably.