Chris Kratz <[EMAIL PROTECTED]> writes: > Does anyone have any idea why there be over a 4s difference between running > the statement directly and using explain analyze?
> Aggregate (cost=9848.12..9848.12 rows=1 width=0) (actual > time=4841.231..4841.235 rows=1 loops=1) > -> Seq Scan on answer (cost=0.00..8561.29 rows=514729 width=0) (actual > time=0.011..2347.762 rows=530576 loops=1) > Total runtime: 4841.412 ms EXPLAIN ANALYZE's principal overhead is two gettimeofday() kernel calls per plan node execution, so 1061154 such calls here. I infer that gettimeofday takes about 4 microseconds on your hardware ... which seems a bit slow for modern machines. What sort of box is it? regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster