Maybe MDB performance relative to BDB degrades as the database get bigger. From your wiki page: "This particular client has 25,208 entries in their LDAP database". My test database has over 3 million entries (production has nearly 7 million), which take about 20 minutes to slapadd into MDB initially. My machine has 128 Gb RAM and the MDB db size isÂ429496729600, so slapd can't map the whole db file into RAM.
How big is your DB when loaded vs maxsize? If you are using writemap, the maxsize *must* be larger than the DB size. Also, what OpenLDAP version are you using? That's always important to note.
--Quanah -- Quanah Gibson-Mount Sr. Member of Technical Staff Zimbra, Inc A Division of VMware, Inc. -------------------- Zimbra :: the leader in open source messaging and collaboration