[postgis-devel] [PostGIS] #1248: Increasing cost of spatial functions.
PostGIS
trac at osgeo.org
Wed Oct 19 03:39:57 PDT 2011
#1248: Increasing cost of spatial functions.
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Reporter: SzymonG | Owner: pramsey
Type: defect | Status: new
Priority: medium | Milestone: PostGIS 2.0.0
Component: postgis | Version: 1.5.X
Keywords: |
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Comment(by robe):
Simon,
I believe we upped the costs of functions in 1.4 or 1.5 though not as high
as you have them set. Right now _ST_Intersects is set to 100. Believe it
or not it used to be 1 which is the default of C functions.
We didn't want to risk upping it any more without more analysis since for
more complex tasks it might skew it unfavorably. Which version of
Postgres are you using? I think the way the planner deals with cost
matrics has changed from 8.3 - current 9.1.
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Ticket URL: <http://trac.osgeo.org/postgis/ticket/1248#comment:1>
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