Note also that osm.org
doesn't use osm2pgsql for
expiring tiles, they
have a custom script that doesn't look at relations. The reason for it
is that some edits to large relations can expire a lot of tiles IIRC.
I can't recall where the script is but it's some ruby script in OSM SVN.
Yes, i already adopted it for out multi-style-environment on cassini and
placed it at , but on cassini it was very slow with this much styles.