我的网站得到了499＆502 + php-fpm.sock失败（11：资源暂时不可用）错误

我的网站playsongs.pk有499,502和php-fpm.sock failed (11: Resource temporarily unavailable) errors当我收到300-400活跃用户在现场。

示例/示例错误日志：

 2017-02-27 14:56:23 Error 162.158.78.50 499 GET / HTTP/1.1 0 nginx access 2017-02-27 14:56:23 Error 162.158.78.20 502 GET / HTTP/1.1 166 nginx access 2017-02-27 14:56:23 Error 162.158.78.170 502 GET / HTTP/1.1 166 nginx access 2017-02-27 14:56:23 Error 162.158.79.63 502 GET / HTTP/1.1 166 nginx access 2017-02-27 14:56:23 Error 162.158.78.50 499 GET / HTTP/1.1 0 nginx access 2017-02-27 14:56:23 Error 162.158.78.20 499 GET / HTTP/1.1 0 nginx access 2017-02-27 14:56:23 Error 162.158.78.20 499 GET / HTTP/1.1 0 nginx access 2017-02-27 14:56:23 Error 162.158.78.20 499 GET / HTTP/1.1 0 nginx access 2017-02-27 14:56:23 Error 162.158.78.20 499 GET / HTTP/1.1 0 nginx access 

过了几次我就到了

 2017-02-27 14:56:23 Error 172.68.65.4 24026#0: *2784527 connect() to unix:///var/www/vhosts/system/playsongs.pk/php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream nginx error 2017-02-27 14:56:23 Error 172.68.65.112 24023#0: *2784529 connect() to unix:///var/www/vhosts/system/playsongs.pk/php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream nginx error 2017-02-27 14:56:23 Error 172.68.65.100 24028#0: *2784539 connect() to unix:///var/www/vhosts/system/playsongs.pk/php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream nginx error 2017-02-27 14:56:23 Error 172.68.65.112 24021#0: *2784541 connect() to unix:///var/www/vhosts/system/playsongs.pk/php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream nginx error 2017-02-27 14:56:23 Error 172.68.65.112 24021#0: *2784545 connect() to unix:///var/www/vhosts/system/playsongs.pk/php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream nginx error 2017-02-27 14:56:23 Error 172.68.65.112 24021#0: *2784547 connect() to unix:///var/www/vhosts/system/playsongs.pk/php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream nginx error 2017-02-27 14:56:23 Error 172.68.65.112 24028#0: *2784549 connect() to unix:///var/www/vhosts/system/playsongs.pk/php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream nginx error 2017-02-27 14:56:23 Error 162.158.78.50 24028#0: *2784551 connect() to unix:///var/www/vhosts/system/playsongs.pk/php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream nginx error 2017-02-27 14:56:23 Error 172.68.65.112 24028#0: *2784552 connect() to unix:///var/www/vhosts/system/playsongs.pk/php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream nginx error 

我的Nginxconfiguration/etc/nginx/nginx.conf ：

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 user nginx; worker_processes auto; #some last versions calculate it automatically worker_rlimit_nofile 99999; error_log /var/log/nginx/error.log crit; include /etc/nginx/modules.conf.d/*.conf; events { worker_connections 66536; use epoll; multi_accept on; } http { include mime.types; default_type application/octet-stream; open_file_cache max=2048 inactive=20s; open_file_cache_valid 30s; open_file_cache_min_uses 5; open_file_cache_errors off; access_log off; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 2; keepalive_requests 100000; reset_timedout_connection on; client_body_timeout 30; send_timeout 15; client_header_timeout 12; proxy_connect_timeout 60; proxy_send_timeout 60; proxy_read_timeout 60; fastcgi_buffers 8 128k; fastcgi_buffer_size 256k; # reduce the data that needs to be sent over network gzip on; gzip_min_length 1000; gzip_proxied expired no-cache no-store private auth; gzip_types application/x-javascript text/css application/javascript text/javascript text/plain text/xml application/json application/v$ gzip_disable "MSIE [1-6]\.(?!.*SV1)"; server_tokens off; include /etc/nginx/conf.d/*.conf; } # override global parameters eg worker_rlimit_nofile include /etc/nginx/*global_params; 

我的php-fpm池设置如下：

 ;[php-fpm-pool-settings] pm = dynamic pm.max_children = 5000 pm.start_servers = 50 pm.min_spare_servers = 20 pm.max_spare_servers = 70 pm.max_requests = 2000 

请注意

服务器有64 GB的RAM，1 GBit专用的INTERNET端口，CPU的平均负载也不超过1.somthing％或2.somthing％

服务器操作系统：Centos 7.2

控制面板：Plesk Onyx

nginx版本：nginx / 1.11.4

#cat /proc/$(cat /run/nginx.pid)/limits的输出如下。 可能会有助于解决这个问题。

 Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size 0 unlimited bytes Max resident set unlimited unlimited bytes Max processes 515124 515124 processes Max open files 1024 4096 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 515124 515124 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us 

tail /var/log/nginx/error.log输出tail /var/log/nginx/error.log

 2017/03/01 15:16:15 [notice] 31867#0: getrlimit(RLIMIT_NOFILE): 1024:4096 2017/03/01 15:16:15 [notice] 31868#0: start worker processes 2017/03/01 15:16:15 [notice] 31868#0: start worker process 31869 2017/03/01 15:16:15 [notice] 31868#0: start worker process 31870 2017/03/01 15:16:15 [notice] 31868#0: start worker process 31871 2017/03/01 15:16:15 [notice] 31868#0: start worker process 31872 2017/03/01 15:16:15 [notice] 31868#0: start worker process 31873 2017/03/01 15:16:15 [notice] 31868#0: start worker process 31874 2017/03/01 15:16:15 [notice] 31868#0: start worker process 31875 2017/03/01 15:16:15 [notice] 31868#0: start worker process 31876