I have MediaWiki 1.16.2 on a the following LAMP platform, which performs quite good for other apps on a 16 GB RAM dual processor machine: CentOS 5.7 (64-bit) Apache 2.2.3 MySQL 5.0.77 PHP 5.1.6
It seems to depend somewhat on the used browser, but very frequently saving edited pages is too slow - not rare to wait 10 or 20 seconds for it even more for a very simple change.
Rendering the pages works pretty fast, but it's the saving after editing which is killing the user experience. I have detected some improvement when editing from a client running Opera than on Firefox (on a Fedora Linux platform).
Any hints about where can I tune up the server to make it better ?
Benchmarks of Apache run on the machine are impressive, BTW.