On Thu, Mar 3, 2016 at 11:45 AM, Emre Hasegeli <e...@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)
