For the past 30 days it happened two times that the database 'just crashed'. For the first time I noticed that it was possible to 'slapcat' the database and suddenly at some point it was simply stopping. Nothing else was possible. I'm making backups of the database every hour.
Today it happened again. When I ran slapd with debugging options then I saw: <notes about the release and compilation> Initializing BDB database...
--Quanah
-- Quanah Gibson-Mount Principal Software Developer ITSS/Shared Services Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html