Re: Bad perf when using DECLARE CURSOR on big table

kimaidou <kimaidou@gmail.com> writes:
> I have seen that this DECLARE has bad perf compared to a simple SQL query :

> Simple SQL query
> =====
> https://explain.dalibo.com/plan/042bc4dc2449adfe
> 96ms

> DECLARE CURSOR for the same query
> =====
> https://explain.dalibo.com/plan/bh83fc0db500a79g#
> 171 031 ms !!

Raising cursor_tuple_fraction would probably help this case.

            regards, tom lane