CentOS6.4 内核优化

vi /etc/sysctl.conf

net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_max_syn_backlog = 8192
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_max_syn_backlog = 65536
net.core.netdev_max_backlog =  32768
net.core.somaxconn = 32768
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3276800
kernel.sysrq = 0
kernel.core_uses_pid = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
vm.swappiness=10
vm.max_map_count=262144

 这些配置来自大侠 抚琴煮酒

让改动配置立即生效

/sbin/sysctl -p

修改limits.conf
vi /etc/security/limits.conf

*        soft   nproc  65536
*        hard   nproc  65536
*        soft   nofile  65536
*        hard   nofile  65536

修改90-nproc.conf
vi /etc/security/limits.d/90-nproc.conf

*          soft    nproc    65536

记得重启服务器