Create sysctl.sh

sysctl.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+Bandwidth="${1:-1000}"   # MB
+RTT="${2:-60}"           # ms
+BDP=`echo "${Bandwidth} ${RTT}" |awk '{printf "%d", ($1 * $2) * ((1024 * 1024) / (1000 * 8))}' 2>/dev/null`
+[ -n "$BDP" ] && [ "$BDP" -gt 0 ] || exit 1
+
+cat >/etc/sysctl.conf<<EOF
+# This line below add by user.
+
+fs.file-max = 104857600
+fs.nr_open = 1048576
+
+vm.overcommit_memory = 1
+
+net.core.somaxconn = 1048576
+net.core.optmem_max = 7864320
+net.core.rmem_max = 7864320
+net.core.wmem_max = 7864320
+net.core.rmem_default = 7864320
+net.core.wmem_default = 7864320
+net.core.netdev_max_backlog = 1048576
+net.core.default_qdisc = fq_codel
+
+net.ipv4.tcp_congestion_control = bbr
+net.ipv4.tcp_mem = 32768 49152 65536
+net.ipv4.tcp_rmem = 4096 87380 7864320
+net.ipv4.tcp_wmem = 4096 16384 7864320
+net.ipv4.tcp_syncookies = 1
+net.ipv4.tcp_syn_retries = 3
+net.ipv4.tcp_synack_retries = 2
+net.ipv4.tcp_max_syn_backlog = 1048576
+net.ipv4.tcp_fin_timeout = 8
+net.ipv4.tcp_keepalive_intvl = 32
+net.ipv4.tcp_keepalive_probes = 3
+net.ipv4.tcp_keepalive_time = 900
+net.ipv4.tcp_retries1 = 3
+net.ipv4.tcp_retries2 = 5
+net.ipv4.tcp_no_metrics_save = 1
+net.ipv4.tcp_timestamps = 1
+net.ipv4.tcp_window_scaling = 1
+net.ipv4.tcp_slow_start_after_idle = 0
+net.ipv4.ip_forward = 1
+
+net.ipv4.tcp_fastopen = 0
+net.ipv4.tcp_fack = 1
+net.ipv4.tcp_sack = 1
+net.ipv4.tcp_dsack = 1
+net.ipv4.tcp_ecn = 0
+net.ipv4.tcp_ecn_fallback = 1
+
+
+net.ipv6.conf.all.disable_ipv6 = 0
+net.ipv6.conf.all.forwarding = 1
+net.ipv6.conf.all.accept_ra = 2
+net.ipv6.conf.all.proxy_ndp = 1
+
+
+
+
+
+EOF