On 9 November 2012 01:32, Stefan Elspaß <[email protected]> wrote:
> I have set up (for the first time) an Ubuntu Server with Apache2 and > renderd/mod_tile - using the instructions from switch2osm.org. I did the > import to PostGIS/Postgres with osm2pgsql (hstore) and used the german style. > With render_list I prerendered Germany up to zoom level 16 for performance > reasons. Nearly everything is working fine, my Leaflet-page works. Except: > when first accessing the (not prerendered) tiles in zoomlevel 17 and 18 I > often receive quite quickly (29-49ms) a HTTP 404 response. When accessing the > same tiles again some seconds later they are sent without any problems (HTTP > 200). I understand you have set out the timeout configs but why is 17 or 18 level tile not getting rendered on the fly ? Is it because of a very slow hardware or dense location ( which is obvious due to map quality in germany) . But I think its the postgres which is slowing you down . Try keeping the postgres on a different machine if possible . Also regarding your choice of mod_tile , mod_tile is a meta tile caching mechanism where the meta tile (8x8) is rendered . mod_tile is good for prerendering and also serving large postion of tiles helpful in panning , but the first request for a new tile in new location is going to take time . :( Do an $iotop to see whats going on with respect to IO , remember virtual machines have bad IO , so also a better file system would increase performance . Regards, pavithran -- pavithran sakamuri http://look-pavi.blogspot.com _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
