net.core.wmem_max is a maximum value, as its name says. net.ipv4.tcp_wmem is a triple value, with minimum, default and maximum values. The maximum given here c

net.core.wmem_max is a maximum value, as its name says. net.ipv4.tcp_wmem is a triple value, with minimum, default and maximum values. The maximum given here cannot exceed the previous value. TCP is a protocol that should be the same regardless whether it is transported by IPv4 or by IPv6. See e.g. https://docs.redhat.com/en/documentation/red_hat_data_grid/7.2/html/performance_tuning_guide/networking_configuration#adjusting_send_receive_window_settings https://docs.redhat.com/en/documentation/red_hat_data_grid/7...