Linux TCP_BASE_MSS: Understanding and Optimizing TCP Segment Size

The 'tcp_base_mss' is a Linux kernel parameter that specifies the base value for the Maximum Segment Size (MSS) used in TCP connections.

MSS refers to the maximum amount of data that can be sent in a single TCP segment. It is determined by the Maximum Transmission Unit (MTU) of the underlying network link minus the TCP/IP headers. The default value for 'tcp_base_mss' is typically set to the MTU of the network interface.

You can view and modify the 'tcp_base_mss' parameter using the 'sysctl' command or by modifying the kernel parameters in the '/etc/sysctl.conf' file.

Changing the 'tcp_base_mss' value can affect the TCP performance and behavior, particularly in scenarios where the network link has a smaller MTU. It can be useful in situations where you want to optimize TCP performance for specific network conditions or applications. However, modifying this parameter should be done with caution and only if you have a good understanding of the implications.