linux并发服务器优化配置

#五万连接优化方案

系统限制最多只允许单个端口 61000-32758=28232个线程

echo "10000 65535" > /proc/sys/net/ipv4/ip_local_port_range

#加大打开文件数的限制

vi /etc/security/limits.conf

* soft nofile 65535

* hard nofile 65535

hive - nofile 65535

hive - nproc 65535

#用户进程限制 此步骤需要重启机器生效，可以设置完后再重启

vi /etc/security/limits.d/20-nproc.conf

* soft nproc 62459

root soft nproc 62459

#网络线程优化

vi /etc/sysctl.conf

# Disable IPv6

net.ipv6.conf.all.disable_ipv6 = 1

net.ipv6.conf.default.disable_ipv6 = 1

# Determines how often to check for stale neighbor entries.

net.ipv4.neigh.default.gc_stale_time=120

# Using arp_announce/arp_ignore to solve the ARP Problem

net.ipv4.conf.default.arp_announce = 2

net.ipv4.conf.all.arp_announce=2

vm.swappiness = 0

net.ipv4.tcp_max_tw_buckets = 5000

net.ipv4.tcp_max_syn_backlog = 1024

net.ipv4.tcp_synack_retries = 2

net.ipv4.conf.lo.arp_announce=2

net.ipv4.tcp_keepalive_time = 1800

net.ipv4.tcp_keepalive_probes = 3

net.ipv4.tcp_keepalive_intvl = 15

net.ipv4.tcp_syncookies = 1

net.ipv4.tcp_tw_reuse = 1

net.ipv4.tcp_tw_recycle = 1

net.ipv4.tcp_fin_timeout = 30

#本配置如果不配置 最大连接数会有限制

kernel.pid_max=65535

#保存退出

#执行命令生效 /sbin/sysctl -p