Hi
Paulster2, thanks for the comment on getting some sleep. ;-)
Yes that's exactly what I did soon after I posted the node. After a good night's sleep, I have found out what's wrong with my Apache server in the morning.
Well, *nothing* was wrong with Apache, it's the Windows XP that Apache runs on that caused the problem. I haven't rebooted the box for a week, the performance of Apache deteriorated gradually, and funny things began to appear.
I never have to worry about rebooting when I had the Linux box earlier. I have only rebooted once or twice when I relocate. So when I move the server on to a Windows box, I never had the habbit of rebooting the box. Now I begin to wonder if I made the right decision at all to move from Linux to Windows. But it's a bit late now that I have over 160GB of stuff stored on NTFS partitions, so I am thinking about getting a cheap PC and install linux on it, and use that as my web server, while still keeping the XP box as it is.