Excerpts from Norberto Delle's message of vie jul 02 13:43:37 -0400 2010:
> As far as I know, It's not being locked. We use it to store digitalized
> documents
> and it's getting very big. I think the server is being turned off before
> it can complete
> an vacuum pass. The server is not kept on overnight.
Oh. That's exceptional. I think you'd be better served by scheduling a
manual vacuum sometime during the day -- and probably with lower
cost_delay parameters, so that it takes less time to complete.