Re: MongoDB 3.2 beating Postgres 9.5.1?

[<pbj@xxxxxxxxxx>]

On Tuesday, July 19, 2016 6:19 AM, Teodor Sigaev <teodor@xxxxxxxxx> 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.

Ok, thanks.

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Teodor Sigaev                                  E-mail: teodor@xxxxxxxxx
                                                    WWW: http://www.sigaev.ru/


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