sanity check on max_fsm_relations

I have an app that needs to create about 50 partitions per day. I'm planning 
to boost up max_fsm_relations to about 100,000, so I won't have to worry 
about changing it again until I can upgrade to 8.4 ;-)  According to the 
docs, this should take about 6MB of shmem, which is no big deal, but I'm 
wondering if there might be other performanace implications that I'm not 
aware of?  Anyone ever run with 6 figure fsm relations (not just pages) 
before? 

-- 
Robert Treat
Conjecture: http://www.xzilla.net
Consulting: http://www.omniti.com