> 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
Does session startup/shutdown depend on tables used in query? Some simpler
query:
time psql -c 'explain analyze SELECT te.idt FROM t_positions AS te WHERE
te.idtr IN (347186)'
QUERY PLAN
----------------------------------------------------------------------------
---------------------------------------------------------
Index Scan using tg_transelem_index1 on tg_transelem te (cost=0.00..8.43
rows=3 width=4) (actual time=0.130..0.134 rows=3 loops=1)
Index Cond: (tr_idtrans = 347186)
Total runtime: 0.211 ms
real 0m0.017s
user 0m0.002s
sys 0m0.004s
-------------------------------------------
Artur Zajac
--
Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance
