If you have four Sun Quad FastEthernet adapters in an Enterprise server, you may experience slow performance and response times during periods of high network traffic. This poor performance is usually caused by applications that use data buffer and socket buffer sizes greater than 8 Kbytes.
You can achieve better network performance by adjusting your application's data buffer size and socket buffer size to be less than or equal to 8 Kbytes. Refer to the application's documentation for instructions on how to set these buffer sizes.