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What disk configuration do you have?<br>
<br>
Simon<br>
<br>
PS CLEANMAP (unannonced global version) runs essentially on a very
similar system, less memory, and doesn't need 10s for a high zoom
tile<br>
<br>
Am 11.01.2012 11:39, schrieb Jason Lee:
<blockquote
cite="mid:CAFbDkp+4uwfjOmuS-+Kno5k6JV==fvpUDqLwuAPx2345N6pJkQ@mail.gmail.com"
type="cite">Hi,
<div>I have mod_tile running on a dedicated Linux server (Ubuntu
11.04, 24GB RAM, 8 virtual QuadCore i7 processors) and
generating some custom maps. I am using ab (Apache Bench) to
benchmark its performance when rendering new tiles (at zooms
17-18, 1 concurrent x 1 run, clearing cache each time) and
getting time around 10,000 ms (10 secs) per tile. Thereafter it
is very quick (100ms) because it is cached.</div>
<div><br>
</div>
<div>Ten seconds does sound quite slow and I was wondering what
can be done to improve it. Just out of curiosity, I tried
disabling all the 7 Layers except for 1 Layer in the Mapnik
stylesheet, so the rendering requires a lot less db querying and
map rendering - but I'm still getting 10 seconds performance.
This would suggest that the performance bottleneck is not
related to the mapnik backend.</div>
<div><br>
</div>
<div>I've also played around with increasing the NUM_THREADS=3 to
32 in the renderd.conf, but still no significant performance
improvement when rendering a fresh tile. Any ideas or pointers
would be welcome. Thanks</div>
<div><br>
</div>
<div>Jason</div>
<div><br>
</div>
<div><br>
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