php 连接到 unix:/var/run/php5-fpm.sock 失败。我的设置有什么问题？
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Connect to unix:/var/run/php5-fpm.sock failed. What is wrong with my setup?
提问by vsapountzis
I have a 2GB VPS on DigitalOcean and I am hosting WordPress 3.9.1 under Debian 7 with NGINX, php-fpm and unix socket.
我在 DigitalOcean 上有一个 2GB 的 VPS，我在 Debian 7 下使用 NGINX、php-fpm 和 unix 套接字托管 WordPress 3.9.1。
It was working perfectly until last week it started showing a "502 bad gateway" error. I checked the logs and found that:
它一直运行良好，直到上周它开始显示“502 错误网关”错误。我检查了日志，发现：
php5-fpm log is showing pm.max_children was reached and nginx log is showing the following:
[error] 3239#0: *15188 connect() to unix:/var/run/php5-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: xxx.xxx.xxx.xxx, server: my.domain, request: "POST /xmlrpc.php HTTP/1.0", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "xxx.xxx.xxx.xxx"
php5-fpm 日志显示 pm.max_children 已到达，nginx 日志显示以下内容：
[error] 3239#0: *15188 connect() to unix:/var/run/php5-fpm.sock failed (11: Resource暂时不可用)，同时连接到上游，客户端：xxx.xxx.xxx.xxx，服务器： my.domain，请求：“POST /xmlrpc.php HTTP/1.0”，上游：“fastcgi://unix:/var/run/php5-fpm.sock:”，主机：“xxx.xxx.xxx.xxx”
I manually changed pm with different settings with no luck. I always restart the daemons after every change.
我用不同的设置手动更改了 pm ，但没有运气。我总是在每次更改后重新启动守护程序。
pm settings are:
下午设置是：
pm = dynamic
pm.max_children = 100
pm.start_servers = 10
pm.min_spare_servers = 10
pm.max_spare_servers = 10
pm.max_requests = 200
www.confhas the listen = /var/run/php5-fpm.sockenabled.
www.conf有listen = /var/run/php5-fpm.sock启用。
Anyone with a similar experience?
有类似经历的人吗？
回答by Rijndael
The first problem is you are specifying 100 max_children, that is awfully high for 2GB. I would drop it to 25 children. See my post here on how to optimise your php-fpm configuration for your setup:
第一个问题是您指定了 100 个 max_children，这对于 2GB 来说非常高。我会把它放到 25 个孩子身上。请参阅我的帖子，了解如何为您的设置优化 php-fpm 配置：
警告：[pool www] 似乎很忙（您可能需要增加 pm.start_servers 或 pm.min/max_spare_servers），正在生成
Also, using unix sockets is slightly faster since it provides you direct network access without any TCP/IP overhead. On the down side, it is not as scalable as TCP/IP. Nginx will throw 502 errors when the sockets have been depleted. In such a case you can either tweak the OS settings to accommodate the larger connection pool or just switch to switch to TCP/IP.
此外，使用 unix 套接字稍微快一些，因为它为您提供直接网络访问，而无需任何 TCP/IP 开销。不利的一面是，它不像 TCP/IP 那样可扩展。当套接字耗尽时，Nginx 将抛出 502 错误。在这种情况下，您可以调整操作系统设置以适应更大的连接池，或者只是切换到 TCP/IP。
In your fastcgi conf change:
在您的 fastcgi conf 更改中：
fastcgi_pass unix:/var/run/php5-fpm.sock;
to:
到：
fastcgi_pass 127.0.0.1:9000;
Note that port 9000 is the default port set in php-fpm, if you have changed php-fpm to listen on another port then swap 9000 with that value. Make sure you restart both php-fpm and nginx.
请注意，端口 9000 是 php-fpm 中设置的默认端口，如果您已将 php-fpm 更改为侦听另一个端口，则将 9000 与该值交换。确保重新启动 php-fpm 和 nginx。
Now, if after all of this, you still cannot get it to work and free -mreturns high memory usage, then it is time to add more ram to your server.
现在，如果在所有这些之后，您仍然无法使其工作并且free -m返回高内存使用率，那么是时候向您的服务器添加更多内存了。
