Re: SP-GiST support for inet datatypes

On Tue, Mar 8, 2016 at 11:17 PM, Oleg Bartunov <obartunov(at)gmail(dot)com> wrote:

>
>
> 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 !
>

I also noticed, that spgist is much faster than gist for other inet
operators. I'd like to see in 9.6.

>
>
>
> 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)
>
>
>
>
>