linux内核参数优化

在 /etc/sysctl.conf 中修改内核参数

net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.ip_local_reserved_ports = 33333,0-11000
net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.ipv4.tcp_rmem=4096 87380 16777216
net.ipv4.tcp_wmem=4096 65535 16777216
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_syn_backlog = 8192
net.ipv4.tcp_max_tw_buckets = 20000
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_window_scaling = 0
net.ipv4.tcp_sack = 0
net.core.netdev_max_backlog = 2048
net.ipv4.tcp_no_metrics_save=1
net.core.somaxconn = 262144
net.ipv4.tcp_max_orphans = 2048
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_keepalive_time = 1200
net.nf_conntrack_max = 1048576 
net.netfilter.nf_conntrack_tcp_timeout_established = 3600
net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60
net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120
net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120

修改完参数要重启go-fastdfs