# max_conn (max_connection)
服务器程序，最大允许的连接数，如max_conn => 10000, 此参数用来设置Server最大允许维持多少个tcp连接。超过此数量后，新进入的连接将被拒绝。
- max_connection最大不得超过操作系统ulimit -n的值，否则会报一条警告信息，并重置为ulimit -n的值
- max_connection默认值为ulimit -n的值
~~~
WARN swServer_start_check: serv->max_conn is exceed the maximum value[100000].
~~~
> 此参数不要调整的过大，根据机器内存的实际情况来设置。Swoole会根据此数值一次性分配一块大内存来保存Connection信息
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