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Performance issues #155

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pnorman opened this issue Sep 24, 2013 · 3 comments
Closed

Performance issues #155

pnorman opened this issue Sep 24, 2013 · 3 comments

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@pnorman
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pnorman commented Sep 24, 2013

After some tests at heavy load, osm13 gets 0.5 MT/s at full CPU. Orm gets ~10 MT/s. osm13 has ~1.75x the CPU power of orm, meaning the HOT style is about 35x slower as openstreetmap-carto. Even if the style is more complex (which I don't know), this is excessive.

@yohanboniface says most of the CPU is spent in renderd, i.e. in mapnik.

gravitystorm/openstreetmap-carto#20 is the relevant ticket for openstreetmap-carto from early in its development. mapnik with ./configure RENDERING_STATS=True is suggested

@yohanboniface
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One thing to dig in is mapbox/carto#304

yohanboniface added a commit that referenced this issue Sep 24, 2013
@yohanboniface
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So with this little fix, load has fall down from 24 to 4 (i.e. just commenting the airport targetted from zoom 10).

@yohanboniface
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And the relevant issue in carto seems to be mapbox/carto#20

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