It may be worth pointing that ocaml-mysql is not thread-ready. I
reported that a few months ago and nothing was done. The problem is
that the bindings do not declare blocking sections, so when one thread
calls a mysql function (which can take time) the other threads won't
be scheduled.

I'm glad to hear about ocamldbi. Is it well maintained ? has blocking
sections stuff ? If so, we (savonet.sf.net) should swicth to it.
--
David