Mark Nottingham schrieb: > Have you done any TCP tuning? Just a bit. I'm very cautious with that since it's very easy to break something. It might work in the tests, but in a production environment it's a different picture and might fire back at you. What I have done so far is the following: ~# sysctl net.ipv4.tcp_tw_reuse = 1 ~# sysctl net.ipv4.tcp_tw_recycle = 1 That helped with reducing the number of TIME_WAITS drastically but didn't speed up the performance. What do you suggest? > When you say 25% CPU, do you mean 25% of the total of a quad-core > box, or 25% of one core? What's the CPU? Argh, forgot to mention that. It's 25% overall of a dual quad-core. I have to correct myself. After I turned tcp_tw_reuse and tcp_tw_recycle on it went down to under 20% overall. It's distributed like that: System: 6% User: 9% Interrupt: 3.5% Cheers, Markus
