LINUX脚本工具:一键优化系统socket参数
Mar192016
#!/bin/bash # set ulimit limit() { echo "ulimit -SHn 102400" >>/etc/rc.local cat >> /etc/security/limits.conf << EOF * soft nofile 65535 * hard nofile 65535 EOF } # set sysctl sysctl() { cp /etc/sysctl.conf /etc/sysctl.conf-$(date +%F).bak true > /etc/sysctl.conf cat >> /etc/sysctl.conf << EOF net.ipv4.ip_forward = 0 net.ipv4.conf.default.rp_filter = 1 net.ipv4.conf.default.accept_source_route = 0 kernel.sysrq = 0 kernel.core_uses_pid = 1 net.ipv4.tcp_syncookies = 1 kernel.msgmnb = 65536 kernel.msgmax = 65536 kernel.shmmax = 68719476736 kernel.shmall = 4294967296 net.ipv4.tcp_max_tw_buckets = 6000 net.ipv4.tcp_sack = 1 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_rmem = 4096 87380 4194304 net.ipv4.tcp_wmem = 4096 16384 4194304 net.core.wmem_default = 8388608 net.core.rmem_default = 8388608 net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.core.netdev_max_backlog = 262144 net.core.somaxconn = 262144 net.ipv4.tcp_max_orphans = 3276800 net.ipv4.tcp_max_syn_backlog = 262144 net.ipv4.tcp_timestamps = 0 net.ipv4.tcp_synack_retries = 1 net.ipv4.tcp_syn_retries = 1 net.ipv4.tcp_tw_recycle = 1 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_mem = 94500000 915000000 927000000 net.ipv4.tcp_fin_timeout = 1 net.ipv4.tcp_keepalive_time = 1200 net.ipv4.ip_local_port_range = 1024 65535 #net.ipv4.icmp_echo_ignore_all = 1 #禁ping,如果有nagios监控,这步可省去 EOF /sbin/sysctl -p echo "sysctl set OK!!" } #----------------------------------------------------------------------------- limit sysctl
【上一篇】ASCII 表参考记录