Centos 高并发下可能用到的配置

Centos 高并发下可能用到的配置, 配置 /etc/sysctl.conf 文件

###############customize config###################
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_max_syn_backlog = 819200
net.ipv4.tcp_max_tw_buckets = 200000
net.nf_conntrack_max = 1000000
net.netfilter.nf_conntrack_max = 1000000
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
net.ipv4.ip_local_port_range = 2000 65000
net.core.somaxconn = 32768
fs.file-max=2097152 
fs.nr_open=2097152
net.core.netdev_max_backlog=819200

net.core.rmem_default=262144
net.core.wmem_default=262144
net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.core.optmem_max=16777216
net.ipv4.tcp_rmem=1024 4096 16777216
net.ipv4.tcp_wmem=1024 4096 16777216

##############customize end###############