《精通Nginx》——2.2 Nginx的全局配置参数

2.2 Nginx的全局配置参数

全局配置部分被用于配置对整个server都有效的参数和前一个章节中的例外格式。全局部分可能包含配置指令，例如，user和worker_processes，也包括“节、部分（section）”。例如，events，这里没有大括号（{}）包围全局部分。

在全局部分中，最重要的配置指令都在表2-1中，这些指令将会是你处理的最重要部分。

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下面是一个使用这些指令的简短的例子。

we want nginx to run as user www

user www;
the load is CPU-bound and we have 12 cores
worker_processes  12;
explicitly specifying the path to the mandatory error log
error_log  /var/log/nginx/error.log;
also explicitly specifying the path to the pid file
pid        /var/run/nginx.pid;
sets up a new configuration context for the 'events' module
events {
    # we're on a Solaris-based system and have determined that nginx
    # will stop responding to new requests over time with the default
    # connection-processing mechanism, so we switch to the second-best
    use /dev/poll;
    # the product of this number and the number of worker_processes
    # indicate s how many simultaneous connections per IP:port pair are
    # accepted
    worker_connections  2048;
}

这一部分应该放置在nginx.conf文件的顶部。