In both cases [a & b] - mostly writing than reading.
There are multiple faq entries for bdb tuning. The thing I'm asking for is a consolidated block in which if you can mention the parameters (I know most of them) and their recommended values (the values or their range is important).
--Quanah
-- Quanah Gibson-Mount Principal Software Developer ITS/Shared Application Services Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html