After reading this interesting article on shared_buffers and wal_buffers:
http://rhaas.blogspot.com/2012/03/tuning-sharedbuffers-and-walbuffers.html
it got me wondering if my settings were ideal. Is there some way to
measure wal_buffer usage in real time, so that I could simply monitor
it for some period of time, and then come up with a way of determining
if the current setting is sufficient?
I tried googling, but every reference that I've found simply defaults
to the "trial & error" approach to performance tuning.