#!/bin/bash
#author xiaobao
#date 2016-12-22 21:12:25
#delete
date=$(date +%y%m%d%h%m%s)
cp /etc/sysctl.conf /etc/sysctl.conf_$
sed -i "/^fs.file-max/d" /etc/sysctl.conf
sed -i "/^net.nf_conntrack_max/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_max_tw_buckets/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_sack/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_window_scaling/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_rmem/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_wmem/d" /etc/sysctl.conf
sed -i "/^net.core.wmem_default/d" /etc/sysctl.conf
sed -i "/^net.core.rmem_default/d" /etc/sysctl.conf
sed -i "/^net.core.rmem_max/d" /etc/sysctl.conf
sed -i "/^net.core.wmem_max/d" /etc/sysctl.conf
sed -i "/^net.core.netdev_max_backlog/d" /etc/sysctl.conf
sed -i "/^net.core.somaxconn/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_max_orphans/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_max_syn_backlog/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_timestamps/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_synack_retries/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_syn_retries/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_syncookies/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_tw_recycle/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_tw_reuse/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_mem/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_fin_timeout/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_keepalive_time/d" /etc/sysctl.conf
sed -i "/^net.ipv4.tcp_abort_on_overflow/d" /etc/sysctl.conf
sed -i "/^net.ipv4.ip_local_port_range/d" /etc/sysctl.conf
sed -i "/^fs.file-max/d" /etc/sysctl.conf
#add
cat >> /etc/sysctl.conf
<< eof
fs.file-max=65535
net.nf_conntrack_max=200000
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.tcp_sack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_rmem = 8760
256960
4088000
net.ipv4.tcp_wmem = 8760
256960
4088000
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_syncookies = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 6291456
7864320
12582912
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_keepalive_time = 30
net.ipv4.tcp_abort_on_overflow = 1
net.ipv4.ip_local_port_range = 1024
65000
fs.file-max = 1020000
eof/sbin/sysctl -p
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