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net.ipv4.tcp_sack = 1
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_no_metrics_save = 1
# increase max TCP buffer size to 32MB (32 * 1024 * 1024)
net.core.rmem_max = 33554432
net.core.wmem_max = 33554432
net.ipv4.tcp_rmem = 4096 513920 33554432
net.ipv4.tcp_wmem = 4096 513920 33554432
net.core.rmem_default = 513920
net.core.wmem_default = 513920