linux 内核优化

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1.优化内核参数

echo "#-------------insert-------------" >> /etc/sysctl.confecho "net.core.netdev_max_backlog = 32768" >> /etc/sysctl.confecho "net.core.rmem_default = 8388608" >> /etc/sysctl.confecho "net.core.rmem_max = 16777216" >> /etc/sysctl.confecho "net.core.somaxconn = 32768" >> /etc/sysctl.confecho "net.core.wmem_default = 8388608" >> /etc/sysctl.confecho "net.core.wmem_max = 16777216" >> /etc/sysctl.confecho "net.ipv4.ip_local_port_range = 5000    65000" >> /etc/sysctl.confecho "net.ipv4.tcp_fin_timeout = 30" >> /etc/sysctl.confecho "net.ipv4.tcp_keepalive_time = 300" >> /etc/sysctl.confecho "net.ipv4.tcp_max_orphans = 3276800" >> /etc/sysctl.confecho "net.ipv4.tcp_max_syn_backlog = 65536" >> /etc/sysctl.confecho "net.ipv4.tcp_max_tw_buckets = 5000" >> /etc/sysctl.confecho "net.ipv4.tcp_mem = 94500000 915000000 927000000" >> /etc/sysctl.confecho "net.ipv4.tcp_syn_retries = 2" >> /etc/sysctl.confecho "net.ipv4.tcp_synack_retries = 2" >> /etc/sysctl.confecho "net.ipv4.tcp_syncookies = 1" >> /etc/sysctl.confecho "net.ipv4.tcp_timestamps = 0" >> /etc/sysctl.confecho "net.ipv4.tcp_tw_recycle = 1" >> /etc/sysctl.confecho "net.ipv4.tcp_tw_reuse = 1" >> /etc/sysctl.conf

2.使参数生效

/sbin/sysctl -p

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