tcp_tw_reuse and tcp_tw_recycle are dangerous. We have seen a significant number of connections from clients behind a NAT gateway being dropped with tcp_tw_recycle = 1.
Absolutely use with caution and test extensively. Everyone one of these tweaks are tuning things at a very granular level and may cause more problems than help.
Btw, the dropped clients has to do with recycle -- reuse is far 'safer', protocol speaking.
