I just found the source of my confusion, the slapd-bdb man page was not on my system. The man pages which were on my system were the old man pages for the old version of openldap that I had installed. The slapd.conf man page at that version showed dbcachesize and there were no separate man pages for the different back-ends. No wonder I was confused.
Ah, disregard my just-sent email then. ;)
--Quanah
-- Quanah Gibson-Mount Principal Software Developer ITSS/TSS/Computing Systems ITSS/TSS/Infrastructure Operations Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html