Re: About optimization

steve wrote: >> Having 8 cores with only 1G of ram would be a weird server config. > > A single socket quad-core with hyper-threading and 2GB RAM for a > 32-bit webserver is not weird. Not everyone is Yahoo where you can > just throw money around. Hyperthreading doesn't come anywhere near making a quad-core cpu run like an 8-core box. If you can get 25% more speed out of hyperthreading, you are doing extremely well, and that is only if the code has a lot of cache misses allowing one hyperthread to run while the other is waiting for a memory fetch. So, assuming plenty of cache misses, your scenario is approximately 5 cores and 2G of ram which is pretty far from the 8/1 ratio I thought was a weird server config. Hyperthreading can also hurt you, so most large sites I know turn it off entirely. -Rasmus