<br><div><span class="gmail_quote">On 28/04/07, <b class="gmail_sendername">Hakan Tandogan</b> <<a href="mailto:hakan@gurkensalat.com">hakan@gurkensalat.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
SteveC wrote:<br>> IMHO the $CACHE site should be default. If I really want the latest<br>> tiles uploaded 3 seconds ago I can switch to that layer. Once these<br>> things are stable and filled with tiles I'll add them to osm.
<br>><br>> On 27 Apr 2007, at 15:24, 80n wrote:<br>><br>>> I've added two new layers at <a href="http://www.informationfreeway.org">www.informationfreeway.org</a>:<br>>><br>>> Firefishy squid proxy
<br>>> Sebastian apache proxy<br>>><br><br>As far as I can see from my browser logs, OpenLayers tries to download<br>the tiles it needs from *all* base layers.<br><br>I'll go check on the openlayers mailing lists whether this is the
<br>intended behaviour and what we can to to "fix" it.</blockquote><div><br>I've just looked into this a bit... This is what I found...<br><br>My test was to use informationfreeway at zoom level 12 on the t@h
layer, to make a permalink, capture traffic and refresh that page in Firefox...<br><br>Capture time: 30s (some requests still waiting, most completed)<br>* HTTP Requests: 374<br> * <a href="http://www.informationfreeway.org">
www.informationfreeway.org</a>: 12<br> * <a href="http://dev.openstreetmap.org">dev.openstreetmap.org</a>: 168 (tile + cycle + maplint)<br> * <a href="http://tile.openstreetmap.org">tile.openstreetmap.org</a>: 74<br> *
<a href="http://osm.sspaeth.de">osm.sspaeth.de</a>: 63<br> * <a href="http://osm-tah-cache.firefishy.com">osm-tah-cache.firefishy.com</a>: 57<br>Max concurrent requests: 36<br>Max concurrent requests per server: 24<br><br>
So, it's definitely hitting all the layers... but... the concurrency was scary, especially considering the changes make to limit the number of concurrent connections on dev...<br><br>Looking at this, it seems the default settings for firefox 2 are the following
<br>network.http.max-connections 48<br>network.http.max-connections-per-server 24<br>network.http.max-persistent-connections-per-server 8<br><br>The following pages explain these settings are suggest different defaults to what is in firefox...
<br><a href="http://kb.mozillazine.org/Network.http.max-connections">http://kb.mozillazine.org/Network.http.max-connections</a> - default: 24<br><a href="http://kb.mozillazine.org/Network.http.max-connections-per-server">
http://kb.mozillazine.org/Network.http.max-connections-per-server</a> - default: 8<br><a href="http://kb.mozillazine.org/Network.http.max-persistent-connections-per-server">http://kb.mozillazine.org/Network.http.max-persistent-connections-per-server
</a> - default:2<br><br>d<br><br></div><br></div>