Have ISPConfig running on a dual processor machine with 2GB RAM and it is taking a very long time for the pages to load up. Processors are idle most of the time so there is nothing going on. Server configured with Suse 10.1 installed via the Perfect Setup procedure (although I did load Gnome desktop instead of text mode).
Reboot did the trick Not sure if it was some updates that came down or the fact that I had been logged in (but then logged out) of ISPConfig on the local console and then went to my laptop to login to ISPConfig - but a reboot of the system did the trick.
When the ISPConfig interface is slow, its is in almost all cases related to a DNS issue. The browser tries to load some images until it times out and loads the rest of the page.
