Some Linux performance tweaks

If a linux machine needs to be scrutinized for performance from a networking perspective,  here are some 'sysctl' variables worth looking at.

1. rmem_max:
2. wmem_max
3. tcp_wmem
4. tcp_rmem
5. somaxconn
6. netdev_max_backlog
7. tcp_max_syn_backlog
8. tcp_fin_timeout
9. tcp_slow_start_after_idle
10. ip_local_port_range
11. tcp_tw_reuse
12. tcp_tw_recycle
13. file_max


And then, there is /etc/security/limits.conf

References:

RH Enterprise Performance Tuning Guide