[OSM-talk] Linuxtag demonstration down - Re: handover of tile.openstreetmap.org

[Nick Hill]

Hi Jon

I looked at apache2.conf.

# prefork MPM
# StartServers ......... number of server processes to start
# MinSpareServers ...... minimum number of server processes which are kept spare
# MaxSpareServers ...... maximum number of server processes which are kept spare
# MaxClients ........... maximum number of server processes allowed to start
# MaxRequestsPerChild .. maximum number of requests a server process serves
<IfModule prefork.c>
StartServers        10
MinSpareServers     10
MaxSpareServers     20
MaxClients          60
MaxRequestsPerChild  100
</IfModule>


I reckon changing maxclients to 20 may help.

With the settings above, 60 apache processes could start. We could have 40 
processes being launched then being immediately killed as the load shoots up and 
down. This can be very resource intensive. Apache tends to queue http requests 
anyway until an http process can handle them.


Jon Burgess wrote:
> Over the past week or so i've seen issues with loading the main
> www.openstreetmap.org map page and no problems with the tiles
> themselves. On several occasions i've waited 30+ seconds for the page
> to appear.
> 
> What failure did you see Joerg, the tiles or the page itself?
> 
> In cases like this the information freeway site can be a good one to
> try since it fetches the tiles without relying on
> www.openstreetmap.org.
> 
>  Jon
>