Re: SP-GiST support for inet datatypes

On Thu, Mar 3, 2016 at 11:45 AM, Emre Hasegeli <emre@hasegeli.com> wrote:

> Emre, I checked original thread and didn't find sample data. Could you provide them for testing ?

I found it on the Git history:

https://github.com/job/irrexplorer/blob/9e8b5330d7ef0022abbe1af18291257e044eb24b/data/irrexplorer_dump.sql.gz?raw=true

Thanks !

spgist index creates 2 times faster than gist, but index size is noticeably  bugger

\di+ route_*
                            List of relations
 Schema |     Name     | Type  |  Owner   | Table  |  Size  | Description
--------+--------------+-------+----------+--------+--------+-------------
 public | route_gist   | index | postgres | routes | 96 MB  |
 public | route_spgist | index | postgres | routes | 132 MB |
(2 rows)

Spgist index tree is much better  than gist - 12149 pages vs 1334760 !

EXPLAIN (ANALYZE, buffers) SELECT routes.route FROM routes JOIN hmm ON
routes.route && hmm.route;
                                                               QUERY PLAN
----------------------------------------------------------------------------------------------------------------------------------------
 Nested Loop  (cost=0.41..570430.27 rows=2338 width=7) (actual time=5.730..12085.747 rows=8127 loops=1)
   Buffers: shared hit=1334760
   ->  Seq Scan on hmm  (cost=0.00..11.32 rows=732 width=7) (actual time=0.013..0.528 rows=732 loops=1)
         Buffers: shared hit=4
   ->  Index Only Scan using route_gist on routes  (cost=0.41..550.26 rows=22900 width=7) (actual time=2.491..16.503 rows=11 loops=732)
         Index Cond: (route && (hmm.route)::inet)
         Heap Fetches: 8127
         Buffers: shared hit=1334756
 Planning time: 0.827 ms
 Execution time: 12086.513 ms
(10 rows)

EXPLAIN (ANALYZE, buffers) SELECT routes.route FROM routes JOIN hmm ON
routes.route && hmm.route;
                                                               QUERY PLAN
-----------------------------------------------------------------------------------------------------------------------------------------
 Nested Loop  (cost=0.41..588634.27 rows=2338 width=7) (actual time=0.043..12.150 rows=8127 loops=1)
   Buffers: shared hit=12149
   ->  Seq Scan on hmm  (cost=0.00..11.32 rows=732 width=7) (actual time=0.013..0.075 rows=732 loops=1)
         Buffers: shared hit=4
   ->  Index Only Scan using route_spgist on routes  (cost=0.41..575.13 rows=22900 width=7) (actual time=0.011..0.015 rows=11 loops=732)
         Index Cond: (route && (hmm.route)::inet)
         Heap Fetches: 8127
         Buffers: shared hit=12145
 Planning time: 0.779 ms
 Execution time: 12.603 ms
(10 rows)