My web site has exceeded my server's capabilities. I have loaded the
server up with 4 gigs of RAM, and it has a fast dual-core processor,
but the site has started to feel slow. What I'd like to do is spread
the load of the web site across several machines. The problem is that
my other (currently unused) machines are much less capable in their
performance, so I don't want to just direct an equal number of users
to each machine. But I searched the web and the approaches that I
found for configuring Apache seemed best suited for balanced load
sharing. What I'd like is free software that manages the site by
sending page requests to the server with the most excess capacity. Is
there such software? Thank you.