Jean-Arthur Silve <jeanarthur(at)eurovox(dot)fr> writes:
> Now, vacuum "blocks" on one table (apparently "comptes" table) , without HD
> activity, no error message....
Curious. Do you want to get in there with a debugger and see where it's
looping?
> PS : I use 7.0 version
Hmm ... are you on 7.0.3? There's a known bug in earlier releases that
could perhaps lead to an endless loop in VACUUM.
The simplest answer is probably "past time to update to 7.2.1", anyway.
regards, tom lane