Steve, It's not a scientific measurement. For this particular example, the whole setup (server and client) is on a XP SP3 machine with 4 Gb memory. From the point when the mapping page is requested, the time taken to start seeing tiles returned is about 15 seconds. After that initial time, the images come in thick and fast. I'm pretty sure that it's the first load of mapserv.exe and, if the requested layer is via postgis, the first load of postgis. I'm trying to think of ways to speed up that initial load like, as I said in the last post, requesting a map tile on the fly (and hidden) so that mapserv.exe has been run once and is in memory ready for the next, or first 'real', request. It's probably the only downside to a system that I've got running like a little sweetie just now.
It's basically a classic asp website running on IIS but I can switch between IIS and Apache for the mapping WMS/WFS. Both are quite fast and both run FastCGI though Apache seems a little more stable when a lot of tiles are requested with a lot of fast map drags; sometimes IIS gives up on individual request. Whether IIS or Apache, there's still this initial load delay of about 15 seconds. This may be something that I have to live with but I'm trying to improve that initial load if possible. To go back to your original question, my guess is that the load time is a server issue rather than a client problem though I may be wrong. Regards, Donald -----Original Message----- From: Lime, Steve D (DNR) [mailto:[email protected]] Sent: 08 June 2012 15:03 To: Donald Kerr; 'mapserver-users' Subject: RE: [mapserver-users] Mapserver/PostGIS Faster Initial Load Time Where/how are you measuring times (server/client)? ________________________________________ From: [email protected] [[email protected]] on behalf of Donald Kerr [[email protected]] Sent: Wednesday, June 06, 2012 2:35 PM To: 'mapserver-users' Subject: [mapserver-users] Mapserver/PostGIS Faster Initial Load Time Basically my mapping setup is, from client to server, Openlayers WMS/WFS (Internet Explorer on XP Pro SP3) - Mapserver CGI - Shapefile (Tiffs) or PostGIS (XP Pro SP3 - IIS & FastCGI). >From boot up, the initial, or first load of maps, takes up to 15 seconds. After that, it flies along fine. I've tried pre-loading in a hidden browser instance but that didn't work. I cannot get that initial load time down at all. Any tips to reduce the time taken for the first load of the software: Specifically Mapserver whether it's creating the map from PostGIS or the shapefile (Tiffs). Many thanks. Regards, Donald _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
