[OSM-dev] Slow rendering

[Stephan Knauss]

Hello Alex,

On 04.05.2021 13:50, Alex Chirigiu wrote:
 > Although we have a pretty powerful server, we still can't nail the 
config to make it as fast as it should be.
 > We use a Ubuntu host with PostGIS and Mapnik on, and we want to 
render Europe to Zoom 18/19 maybe. We managed to render Z15 completely, 
but it took like 17 days...

What is your rendering rate? So how many metatiles per second/minute are 
you rendering?

I have a much smaller machine and render with a peak of 30 metatiles per 
minute while the server is only rendering. With parallel activity for 
other work, rendering rate drops. I also wondered whether this is the 
expected speed. I thought that earlier setups had a higher rate, but I 
changes so many parameters, that I can't compare.

I render updated tiles after osm2pgsql updates and background rendering 
of old tiles. I capture rendered tile statistics every 5 minutes:

https://i.postimg.cc/xTFwM1pc/tirex-rendering-rate-max150mt-in-5min.png

So what is your current rendering rate?

You might compare with some of the official rendering machines:
https://munin.openstreetmap.org/renderd-day.html

Have you checked this list of companies offering paid services?

https://wiki.openstreetmap.org/wiki/Commercial_OSM_Software_and_Services

Stephan