修改/etc/security/limits.conf文件

*               soft    nofile          85536
*               soft    nproc           85536
*               hard    nofile          85536
*               hard    nproc           85536
*                -      nofile          85536
elasticsearch   sfot    nofile          100000
elasticsearch   hard    nofile          100000

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

*          soft    nproc     85536
*          hard    nproc     85536
root       soft    nproc     unlimited

vi /etc/ssh/sshd_config

将# UseLogin no

UseLogin yes

重启sshd服务

vim /etc/sysctl.conf

vm.max_map_count=655360
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.tcp_tw_reuse = 1
fs.file-max = 65536
net.ipv4.tcp_syncookies = 0
net.ipv4.tcp_orphan_retries = 1
net.ipv4.tcp_fin_timeout = 25
net.ipv4.tcp_max_orphans = 8192
net.ipv4.ip_local_port_range = 32768    61000

sysctl -p