Nginx 和 PHP-FPM 连接不足

Question

我一直遇到这样的错误，

[02-Jun-2012 01:52:04] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 19 idle, and 49 total children
[02-Jun-2012 01:52:05] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 16 children, there are 19 idle, and 50 total children
[02-Jun-2012 01:52:06] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 32 children, there are 19 idle, and 51 total children
[02-Jun-2012 03:10:51] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 18 idle, and 91 total children

我将 php-fpm 的设置更改为这些，

pm.max_children = 150 (It was at 100, i got a max_children reached and upped to 150)
pm.start_servers = 75
pm.min_spare_servers = 20
pm.max_spare_servers = 150

导致

[02-Jun-2012 01:39:19] WARNING: [pool www] server reached pm.max_children setting (150), consider raising it

我刚刚推出了一个新网站，该网站的流量相当可观。此流量是合法的，当达到限制时，用户会收到 504 网关超时。

我使用 IPTABLES 与我的服务器的连接有限，我正在运行 fail2ban 并跟踪 nginx 访问日志。流量都是合法的，我只是没有空间供用户使用。

我目前在 ubuntu 64 位双核机器上运行。

free
             total       used       free     shared    buffers     cached
Mem:       6114284    5726984     387300          0     141612    4985384
-/+ buffers/cache:     599988    5514296
Swap:       524284       5804     518480

我的 php.ini max_input_time = 60

我的 nginx 配置是

worker_processes 4;
pid /var/run/nginx.pid;

events {
    worker_connections 19000;
    # multi_accept on;
}
worker_rlimit_nofile    20000;  #each connection needs a filehandle (or 2 if you are proxying)

client_max_body_size 30M;
client_body_timeout   10;
client_header_timeout 10;
keepalive_timeout     5 5;
send_timeout          10;

    location ~ \.php$ {
    try_files $uri /er/error.php;
    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    fastcgi_connect_timeout 60;
    fastcgi_send_timeout 180;
    fastcgi_read_timeout 180;
    fastcgi_buffer_size 128k;
    fastcgi_buffers 256 16k;
    fastcgi_busy_buffers_size 256k;
    fastcgi_temp_file_write_size 256k;
    fastcgi_max_temp_file_size 0;
    fastcgi_intercept_errors on;
    fastcgi_pass unix:/tmp/php5-fpm.sock;
    fastcgi_index index.php;
    include fastcgi_params;
}

我该怎么做才能停止连接用完？为什么这种情况不断发生？我正在实时监控 Google Analytics 上的流量，当用户数超过 120 时，我的 php-fpm.log 中充满了这些警告。

Answer 1

您是否考虑过遵循日志消息中提供的良好建议，提高pm.max_children? 您有大量可用 RAM 来容纳它们。

回答您的问题：

• 我该怎么做才能停止连接用完？提供更多连接，或减少您收到的连接数。
• 为什么这种情况不断发生？因为你的连接总是用尽。