K 10 svn:author V 3 mav K 8 svn:date V 27 2020-06-02T20:42:45.570721Z K 7 svn:log V 311 MFC 361400: Do not try to fill socket send buffer to the last byte. Setting so_snd.sb_lowat to at least 1/8 of the socket buffer size allows send thread more actively use PDUs coalescing, that dramatically reduces TCP lock congestion and number of context switches, when the socket is full and PDUs are small. END