On 10.06.2011, at 17:44, Stefan Menzel wrote:
> as you might have noticed on my former questions I’m setting up a tileserver. 
> This tileserver is part of my diploma thesis for loadbalancing in p2p 
> Networks. Its running on an VM at my university. So I’m not aware of the HDD 
> specs. But it has a  CPU 8 Core an 8GB Ram. I’m surprised by the rendering 
> time.  Rendering tiles on low toom levels  takes a long time. Up to 600 sec 
> so I get a timeout on tirex. Is This normal. Could a single pc handle 
> rendering on demand without any caching?

Some hints:

- display less data in low scales
- add indices for columns you filter on
- create generalized geometries
- cluster your database on the spatial index

The database created by osm2pgsql is not optimized, so rendering will always 
take a long time if you don't tune it. You should take a look at 
http://imposm.org if you need on demand rendering.

Regards,
Oliver

-- 
Oliver Tonnhofer    | Omniscale GmbH & Co KG    | http://omniscale.de
http://mapproxy.org | https://bitbucket.org/olt | @oltonn





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