Archive for November, 2014

TCP Auto-Tuning

November 17th, 2014 No comments

There is a field in each TCP segment called the “receive window”.  The receiver is essentially signalling the amount of data that it can accept, or is willing to accept.  This post describes the metrics and overhead.

The overhead is: window/2^tcp_adv_win_scale (tcp_adv_win_scale default is 2) So for linux default parameters for the recieve window (tcp_rmem):
87380 – (87380 / 2^2) = 65536. Read more…

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