centos7.x内核参数优化脚本
1 内核优化脚本
cat <<eof> /etc/sysctl.d/sysctl.conf net.ipv4.tcp_fin_timeout = 2 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_tw_recycle = 1 net.ipv4.tcp_syncookies = 1 net.ipv4.tcp_keepalive_time =600 net.ipv4.ip_local_port_range = 4000 65000 net.ipv4.tcp_max_syn_backlog = 16384 net.ipv4.tcp_max_tw_buckets = 36000 net.ipv4.route.gc_timeout = 100 net.ipv4.tcp_syn_retries = 1 net.ipv4.tcp_synack_retries = 1 net.core.somaxconn = 16384 net.core.netdev_max_backlog = 16384 net.ipv4.tcp_max_orphans = 16384 net.nf_conntrack_max = 25000000 net.netfilter.nf_conntrack_max = 25000000 net.netfilter.nf_conntrack_tcp_timeout_established = 180 net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60 net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120 #以下2条是docker优化选项 #net.bridge.bridge-nf-call-iptables = 1 #net.bridge.bridge-nf-call-ip6tables = 1 eof modprobe ip_conntrack && modprobe bridge chmod +x /etc/rc.d/rc.local echo "modprobe ip_conntrack" >> /etc/rc.local echo "modprobe bridge" >> /etc/rc.local /sbin/sysctl -p /etc/sysctl.d/sysctl.conf