On Tuesday, July 19, 2016 6:19 AM, Teodor Sigaev <teodor@sigaev.ru> wrote:
> CREATE INDEX json_tables_idx ON json_tables USING GIN (data jsonb_path_ops); > Bitmap Heap Scan on json_tables (cost=113.50..37914.64 rows=10000 width=1261) > (actual time=2157.118..1259550.327 rows=909091 loops=1) > Recheck Cond: (data @> '{"name": "AC3 Case Red"}'::jsonb) > Rows Removed by Index Recheck: 4360296 > Heap Blocks: exact=37031 lossy=872059 Hmm, looks like too small work_mem because lossy heap block count is too big.