2

I've setup a Mapnik tileserver with this steps: https://switch2osm.org/manually-building-a-tile-server-18-04-lts/

This are the specs of my server:

  • OS: Ubuntu 18.04 LTS
  • 8 vcpu's
  • 28 GB RAM

I've imported an extract of Europe (Belgium-Netherlands-France-Germany). Tile server is running, but tile generation is very slow. When showing tiles in a leaflet map, it can take 30-40 seconds to render one mapview. I've followed the steps from https://switch2osm.org/manually-building-a-tile-server-18-04-lts/ literally.

Is this normal behaviour?

Improve this question
5
  • do you have a tile cache in place on the server (e.g. MapProxy)? I don't know much about Mapnik but without a tile cache, it sounds like it might be (re-)rendering all tiles on demand. MapProxy will cache rendered tiles and send those back to clients, which should be much faster. You can also 'seed the cache' (e.g. pre-render all tiles up to zoom level 10, or higher zoom levels in particular areas)
    – Steven Kay
    Commented Jun 25, 2018 at 18:55
  • I can't comment from experience about how fast that spec of server should render a tile based on most of western Europe, but I doubt that 30-40s is excessive for low zoom tiles. Normally people pre-render low zoom tiles so that there's always a tile available, even if it's not bang up to date. Try giving timings for a /dirty on tiles at different zoom levels, e.g. a.tile.openstreetmap.org/7/65/43.png and a.tile.openstreetmap.org/17/67021/44876.png (but obviously on your system, not osm.org).
    – SomeoneElse
    Commented Jul 2, 2018 at 14:05
  • 1
    @Steven Kay Renderd/Mod_tile (which those instructions use) can render on demand but will return an existing tile out to the requester if one exists. On a public site I prerender up to z12 using render_list, and that replaces tiles that are 4 days old.
    – SomeoneElse
    Commented Jul 2, 2018 at 14:08
  • One more thing - if you look at /var/log/syslog you'll see "START TILE" and "DONE TILE" and more besides as it's actually rendering tiles.
    – SomeoneElse
    Commented Jul 2, 2018 at 14:12
  • Get better processing power,vCPUs wont cut it in this arena. I have 24 cores and this screen render_list -m default -a -z 15 -Z 19 --num-threads=22 is taking ages. Get a dedicated server, AWS "vCPU" is.... poor at his particular task.
    – Gandalf
    Commented Jun 25, 2020 at 21:09

1 Answer 1

Reset to default
1

A key factor in tile rendering is the server configuration. For an example, here is the configuration of the OSM tiles generation server: https://hardware.openstreetmap.org/servers/odin.openstreetmap.org/

Disk access is important, on a cloud based server the disk access may slow tile rendering.

Improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.