>>>>> "BM" == Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
BM> I think it all depends on your working set. Having shared memory be
BM> smaller than you working set causes pages to have to be copied in from
BM> the kernel buffers (not a huge problem, but a small penalty), while
BM> having shared memory larger than the working set causes overhead of
BM> searching through all those buffers.
i.e., It is a black art, and no single piece of advice can be taken in
isolation ;-(