Will litespeed add support for async io or writeav? I heard these lower iowait when serving huge static files. This is the case on an inferior server running lighttpd, the iowait is much lower than on a higher end server running litespeed enterprise.
Today, I had to use my friend's server, running on lighttpd to serve the huge multimedia files because the iowait was really high and made my forum really slow. I was surprised that his server handled it fine with only 25% of my server's memory and load was well under 1. He said it's due to async io and I said why don't I suggest this to George.
When a server performance is disk bound, async I/O will help a lot, as normally disk operation will block the single thread server process.
We currently suggest a multi-CPU license for this kind situation.