=?iso-8859-2?Q?Artur_Zaj=B1c?= <azajac(at)ang(dot)com(dot)pl> writes:
> Why there is so big difference between explain analyze (0.710 ms) and real
> execution time (3309 ms)?
EXPLAIN ANALYZE doesn't account for all of the runtime involved. In
this case, I'd bet that session startup/shutdown is a big part of the
difference.
regards, tom lane