Raja Kumar Thatte <trajakumar(at)yahoo(dot)com> writes:
> After 7 to 8 hours I am getting
> ERROR: out of free buffers: time to abort !
> vacuumdb: vacuum xyzdb failed
What do you have shared_buffers set to?
If it's still the default (64), that's way too small for a production
installation. Try a few thousand instead.
regards, tom lane