How to use this parameter and why should we use it?

in config.ini there is a experimental parameter for

socket read watermark optimization

use-socket-read-watermark = 0
in net_plugin.cpp under plugin

bool use_socket_read_watermark = false;

1 Answer 1


The option appears to have been introduced in v1.0.4, and it enables low-water marks for socket communication to minimise the number of send calls required to get a minimum number of bytes (i.e. enable faster communication.) However, this is not widely supported; poll(2) in Linux ignores SO_RCVLOWAT, but OS X may support it.

  • so did it give any improvement in the performance ?
    – NaN
    Oct 5, 2018 at 7:40
  • I'm not aware of any testing performed to answer this unfortunately
    – confused00
    Oct 5, 2018 at 7:43

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