乘客记忆状态的输出

----- Passenger processes -----
PID    VMSize    Private  Name
-------------------------------
28572  207.4 MB  ?        Rack: /home/myapp/application
28580  207.0 MB  ?        Rack: /home/myapp/application
28588  206.0 MB  ?        Rack: /home/myapp/application
28648  206.5 MB  ?        Rack: /home/myapp/application
29005  23.0 MB   ?        PassengerWatchdog
29008  100.5 MB  ?        PassengerHelperAgent
29010  43.1 MB   ?        Passenger spawn server
29013  70.8 MB   ?        PassengerLoggingAgent
29053  202.0 MB  ?        Passenger ApplicationSpawner: /home/myapp/application
29105  202.3 MB  ?        Rack: /home/myapp/application
29114  202.3 MB  ?        Rack: /home/myapp/application
29121  202.3 MB  ?        Rack: /home/myapp/application
29130  202.3 MB  ?        Rack: /home/myapp/application
29138  202.3 MB  ?        Rack: /home/myapp/application

看起来好像产生了很多程序…这是一个正在开发中的应用程序,没有人(我知道)碰到过它…

乘客状态的输出

  App root: /home/myapp/application
  * PID: 29105   Sessions: 1    Processed: 0       Uptime: 15m 11s
  * PID: 29114   Sessions: 1    Processed: 0       Uptime: 14m 0s
  * PID: 29121   Sessions: 1    Processed: 0       Uptime: 14m 0s
  * PID: 29130   Sessions: 1    Processed: 0       Uptime: 14m 0s
  * PID: 29138   Sessions: 1    Processed: 0       Uptime: 14m 0s

首先,这正常吗？

第二,可能的原因？

解决方法:

对于任何遇到此问题的Rails挂起的人…如果您正在有限的内存VPS上运行,请检查并确保调整max_pool,以免产生过多的应用程序实例供您的系统处理.默认值为6,这显然对于内存不足的VPS来说太多了.

有关最大池设置的文档：
http://www.modrails.com/documentation/Users%20guide%20Nginx.html#PassengerMaxPoolSize