CPU time for slapd.
Hopefully this is useful information. Our problems sounded similar and so I thought I'd let you know what I was looking at. If you figure more out, please let me know, and I'll do the same.
Nathan,
--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