[Tilecache] Tilecache too slow

[Stefan Priess]

Hello List,

in loaded the planet.osm file into my db and want to prerender some tiles 
so i call:

tilecache_seed.py osm 0 7

my cifg:

[osm]
type=Mapnik
mapfile=/opt/mapniktools/osm.xml
extension=png
spherical_mercator=true
metabuffer=256
metatile=yes

Output:

Cache miss: -20037508.34,-20037508.34,20037508.3384,20037508.3384, Tile: 
x: 0, y: 0, z: 0, time: 4.50857400894
Cache miss: 
-20037508.34,-20037508.34,-0.000799998641014,-0.000799998641014, Tile: x: 
0, y: 0, z: 1, time: 2.24050211906
Cache miss: -20037508.34,-20037508.34,-10018754.1704,-10018754.1704, Tile: 
x: 0, y: 0, z: 2, time: 47.7445428371
Cache miss: -20037508.34,-20037508.34,-15028131.2552,-15028131.2552, Tile: 
x: 0, y: 0, z: 3, time: 33.1307868958
Cache miss: 5009377.084,-20037508.34,10018754.1688,-15028131.2552, Tile: 
x: 5, y: 0, z: 3, time: 23.2806358337
Cache miss: -20037508.34,5009377.084,-15028131.2552,10018754.1688, Tile: 
x: 0, y: 5, z: 3, time: 27.7289340496
Cache miss: 5009377.084,5009377.084,10018754.1688,10018754.1688, Tile: x: 
5, y: 5, z: 3, time: 21.4363980293
Cache miss: -20037508.34,-20037508.34,-17532819.7976,-17532819.7976, Tile: 
x: 0, y: 0, z: 4, time: 2.18496513367
Cache miss: -7514065.628,-20037508.34,-5009377.0856,-17532819.7976, Tile: 
x: 5, y: 0, z: 4, time: 1.23492002487
Cache miss: 5009377.084,-20037508.34,7514065.6264,-17532819.7976, Tile: x: 
10, y: 0, z: 4, time: 0.98893404007
Cache miss: 17532819.796,-20037508.34,20037508.3384,-17532819.7976, Tile: 
x: 15, y: 0, z: 4, time: 0.568192005157
Cache miss: -20037508.34,-7514065.628,-17532819.7976,-5009377.0856, Tile: 
x: 0, y: 5, z: 4, time: 23.5294082165

This is too slow! 8GB Mem and 2x CPU with 4x Cores each 2,66GHz should 
have enough power.
I use Tilecache 2.10 with the Patch to avoid the zero data layer bug.

Any ideas?

regards

Stefan
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