[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
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Reporter: zwerner | Owner: pramsey
Type: defect | Status: new
Priority: medium | Milestone: PostGIS 2.0.3
Component: postgis | Version: 2.0.x
Keywords: |
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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.
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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2196#comment:5>
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