**增加系统资源限制

编辑 /etc/sysctl.conf，添加或修改以下内容：
fs.file-max =102400

net.core.somaxconn = 65535
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_fin_timeout = 15

编辑 /etc/security/limits.conf 文件，添加以下内容：
* soft nofile 102400
* hard nofile 102400
在 /etc/systemd/system.conf 文件中添加或修改以下行：
DefaultLimitNOFILE=102400
DefaultLimitNPROC=102400　　#这行可以先不加
在 /etc/systemd/user.conf 文件中添加或修改以下行
DefaultLimitNOFILE=102400
DefaultLimitNPROC=102400　　#这行可以先不加

调整 Nginx 配置
worker_processes auto;
worker_rlimit_nofile 102400;
events {
    worker_connections 102400;
    multi_accept on;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     on;
    keepalive_timeout  65;
    types_hash_max_size 2048;
    server_tokens off;

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
　　#server 这部分可以单独配置在  /etc/nginx/conf.d/*.conf;

    server {
        listen 80;
        server_name 192.168.208.131;

        location / {
            proxy_pass http://localhost:5000;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
        }
    }
}