Re: SP-GiST support for inet datatypes

On Thu, Mar 3, 2016 at 11:45 AM, Emre Hasegeli <emre(at)hasegeli(dot)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)