[Tilesathome] Is it me?

[Florian Lohoff]

On Sun, Sep 07, 2008 at 10:11:58AM +1200, Rob Reid wrote:
> - ROMA and XAPI are other sources of the map data maintained separately 
> and up to about 5 min behind the OSM api server in terms of updating the 
> map data. It's possible for these map sources to be busy or unavailable 
> as well and again the client will pause until it times out.

The problem is that when the autoTileChanged process kicks in and queues
a couple thousand prio2 requests all the clients hunt for data
immediatly (prio4 normalle do not contain a lot data). So what i can see
on ROMA is that i sometimes have 30-50 clients request a tiles data
within the same second. This drives the load on the machine up to 10-15.
ROMA then refuses to take data requests until the load goes below 8.

So on the switches from all-clients-prio4 to all-clients-prio2 you will
see long delays before all clients are rendering again.

Flo
-- 
Florian Lohoff                  flo at rfc822.org             +49-171-2280134
	Those who would give up a little freedom to get a little 
          security shall soon have neither - Benjamin Franklin
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