[OSM-dev] slow osm.org tile server

Tue Apr 16 10:09:41 UTC 2019

For previous attempts to fix it, please look into
https://github.com/openstreetmap/chef/pull/97 - in 2016 delay pools were
mindlessly set to unusable limits if your ISP happens to have more than a
couple of OpenStreetMap users, and not all the values were raised since
then.

On Tue, Apr 16, 2019 at 8:33 AM Wolfram Schneider <wosch at freebsd.org> wrote:

> On Wed, 10 Apr 2019 at 08:56, Tom Hughes <tom at compton.nu> wrote:
> >
> > On 09/04/2019 19:39, Wolfram Schneider wrote:
> > > On Mon, 25 Mar 2019 at 18:16, Wolfram Schneider <wosch at freebsd.org>
> wrote:
> > >>
> > >> Hi,
> > >>
> > >> I noticed that the standard OSM tile servers
> > >> (N.tile.openstreetmap.org) are currently slow.
> > >>
> > >> On the site
> > >>
> > >>    https://mc.bbbike.org/mc/
> > >>
> > >> you will see that OSM is the slowest, and takes at least 5 seconds to
> > >> get all tiles. The other servers responses in less than a second.
> > >>
> > >> Downloading a single tile is also always slow:
> > >>
> > >> curl https://b.tile.openstreetmap.org/11/1100/671.png >/dev/null
> > >>    % Total    % Received % Xferd  Average Speed   Time    Time
>  Time  Current
> > >>                                   Dload  Upload   Total   Spent
> Left  Speed
> > >> 100 41017  100 41017    0     0   7658      0  0:00:05  0:00:05
> --:--:--  7146
> > >>
> > >> it seems that there is a delay of 5 seconds until the tile is fully
> > >> delivered, and the download rate is at 7Kbyte/s. I tried this from
> > >> different locations (Bay Area, NYC, Germany) - the result is always
> > >> the same.
> > >
> > > it was better in the last week, down to 2-3 seconds. But not it is
> > > slow as hell again and takes more than 6.5 seconds to fetch a single
> > > tile:
> > >
> > > time curl -sSf https://c.tile.openstreetmap.org/11/1100/671.png
> >/dev/null
> > > real 0m6.587s
> > > user 0m0.017s
> > > sys 0m0.009s
> > >
> > > you can repeat the request and it is still slow (5+ seconds).
> > >
> > > who is in charge of the HTTPS setup for OSM?
> >
> > Using curl like that will be slow beause you are being put
> > in a deliberate slow lane when not coming via the web site.
>
> I first noticed the slow tile servers while visiting the main web site
> https://www.openstreetmap.org using a browser. It didn't matter which
> browser I used, Safari, Firefox, Google Chrome etc. This was more than
> 4 weeks ago. Changing the user agent does not speedup anything. You
> can use an empty user agent, a random user agent ("foobar") or a real
> one, same results. If there is a slow lane, then apparently all user
> agent are effected.
>
> Google Chrome reports a page load time of 7 seconds for
> https://www.openstreetmap.org which is notable slow and you don't want
> use in a presentation or show your mom. If you move the slippymap, it
> will takes another 5 seconds.
>
> In contrast, the OpenCycleMap https://www.opencyclemap.org loads in
> less than a second (!). For me, both tile servers
> (https://a.tile.openstreetmap.org/ and
> https://a.tile.thunderforest.com/cycle) are running at the same data
> center at hetzner.com (ping time < 20ms). It is unlikely a provider
> issue.
>
> I run the tests from different locations (US West, US East, Germany,
> Finland) and different providers (Yahoo, Alibaba, Hetzner, Vodafone,
> Telefonica) - same results. Big providers may have network slowdowns,
> but they usually fix this in minutes or hours.
>
> My gut feeling is that something is wrong with the SSL setup at
> tile.openstreetmap.org. Feel free to contact me if you have any
> question.
>
> -Wolfram
>
>
> >
> > Tom
> >
> > > -Wolfram
> > >
> > >
> > >> PS: if I do not use HTTPS and instead plain old HTTP, it will take
> > >> only 0.3 - 0.6 seconds.
> > >>
> > >> Any idea whats wrong with the HTTPS setup for the tile servers?
> > >>
> > >> -Wolfram
> > >> --
> > >> Wolfram Schneider <wosch at FreeBSD.org> https://wolfram.schneider.org
> > >> Planet.osm extracts: https://extract.bbbike.org
> > >> BBBike Map Compare: https://mc.bbbike.org/mc
> > --
> > Tom Hughes (tom at compton.nu)
> > http://compton.nu/
> --
> Wolfram Schneider <wosch at FreeBSD.org> https://wolfram.schneider.org
>
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>

-- 
Darafei Praliaskouski
Support me: http://patreon.com/komzpa
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