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[Maposmatic-dev] [RFC] Query optimization and GEOS version
From: |
Maxime Petazzoni |
Subject: |
[Maposmatic-dev] [RFC] Query optimization and GEOS version |
Date: |
Fri, 16 Jul 2010 11:45:13 +0200 |
Hi all,
I've given some more work to my query optimization patch in the past few
days, in particular to track down these annoying GEOS intersect errors.
It appears the version of GEOS on the server (3.0.x) is very buggy with
intersections computations so there is no real solution here
unfortunately.
Possible courses of action are:
* upgrade the server to 10.4 to get Postgres 8.4 and GEOS 3.2, with
which we can use this patch and benefit from the significant
performance improvement. I have tested it on my machine and so far
no rendering has failed with GEOS errors, not to mention the way,
way faster queries.
I don't know Ubuntu enough to handle this upgrade though. Not sure
of the effect of the upgrade on our infrastructure, too.
* migrate to the new server as soon as possible, we're waiting to here
from Jerome here on the hardware issues of the machine hosting our
VM. It runs Debian testing, and has Postgres 8.4 and GEOS 3.2.
* do nothing, and be sad. :)
Comments, questions and feedback on the patch itself is also appreciated
of course!
- Maxime
- [Maposmatic-dev] [RFC] Query optimization and GEOS version,
Maxime Petazzoni <=