[postgis-tickets] [PostGIS] #2196: ST_Intersects performs worse on 2.0 than 1.5

PostGIS trac at osgeo.org
Thu Jan 31 06:48:25 PST 2013


#2196: ST_Intersects performs worse on 2.0 than 1.5
---------------------+------------------------------------------------------
 Reporter:  zwerner  |       Owner:  pramsey      
     Type:  defect   |      Status:  new          
 Priority:  medium   |   Milestone:  PostGIS 2.0.3
Component:  postgis  |     Version:  2.0.x        
 Keywords:           |  
---------------------+------------------------------------------------------

Comment(by zwerner):

 The query is on 5.2 million rows (so a bit too big to post here), but it's
 a bunch of junk data anyway. Basically it's a random distribution from
 random points around the world, and a bigger part of the table/query is
 additional information that is being matched as well. To keep things
 simple, if you were to make a table with just the geometries in a random
 distribution, generate a simple index on that column and then do a simple
 intersects query off of it, you would get these results. I attached
 (above) a sample file to do all of this along with the sample data I'm
 using.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/2196#comment:5>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.


More information about the postgis-tickets mailing list