tcp_slow_start_initial

Description

The maximum initial congestion window (cwnd) size in MSS of a TCP connection.

Refer to RFC 2414 on how initial congestion window size is calculated.

When to Change

This is the maximum value a TCP cwnd can grow to. Note that even if an application uses setsockopt(3SOCKET) to change the window size to a value higher than tcp_cwnd_max, the actual window used can never grow beyond tcp_cwnd_max. Thus, tcp_max_buf should be greater than tcp_cwnd_max in general.

Commitment Level

Unstable

Dynamic?

Yes

When to Change

Do not change the value.

If the initial cwnd size causes network congestion under special circumstances, decrease the value.

Commitment Level

Unstable