By Sylvain Duloutre-Oracle on Jun 02, 2010
In some DPS deployments, there is a high number of new connections being established. This high connection rate may lead to performances issues.
It may be useful to consider changing the tcp time wait interval: That parameter notifies TCP/IP on how long to keep the connection control blocks closed. After the applications drop the TCP/IP connection, the control blocks are kept for the specified time. When high connection rates occur, a large backlog of the TCP/IP connections accumulate and can slow server performance. The server can stall during certain peak periods. If the server stalls, the netstat command shows that many of the sockets that are opened to the server are in TIME_WAIT state
On Solaris, you can change the tcp_timeout_interval using ndd.