Steve Clark <sclark@xxxxxxxxxxxxx> writes:
> explain shows:
> Aggregate (cost=4712921585.30..4712921585.31 rows=1 width=0)
> -> Seq Scan on t_event_ack_log a (cost=103170.29..4712920878.60
> rows=282677 width=0)
> Filter: (NOT (subplan))
> SubPlan
> -> Materialize (cost=103170.29..117301.92 rows=1016163
> width=4)
> -> Index Scan using pk_tuel_eln on t_unit_event_log
> (cost=0.00..98184.12 rows=1016163 width=4)
Yeah, that's going to suck. A brute force solution is to see if you
can get it to switch to a "hashed subplan" by increasing work_mem.
Also, whatever is the ORDER BY for?
regards, tom lane
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