多resque工人模式下創建額外的過程

Question

我要開始4名resque工人，所以我用下面的命令

bundle exec rake environment resque:workers RAILS_ENV=production COUNT=4 QUEUE=* VERBOSE=1 PIDFILE=tmp/pids/resque_worker.pid >> log/resque_worker_QUEUE.log 

但要Web界面，它實際上開始8名工人。有兩個父進程和四個子進程。以下是處理過程的樹視圖：

 
ruby /code_base/bundle/ruby/1.9.1/bin/rake environment resque:workers RAILS_ENV=production COUNT=4 QUEUE=* VERBOSE=1 PIDFILE=tmp/pids/resque_worker.pid 
\_ [ruby] 
\_ resque-1.15.0: Waiting for *                   
| \_ [ruby] 
\_ resque-1.15.0: Waiting for *                   
| \_ [ruby] 
\_ resque-1.15.0: Waiting for *                   
| \_ [ruby] 
\_ resque-1.15.0: Waiting for *                   
    \_ [ruby] 
ruby /code_base/bundle/ruby/1.9.1/bin/rake environment resque:workers RAILS_ENV=production COUNT=4 QUEUE=* VERBOSE=1 PIDFILE=tmp/pids/resque_worker.pid 
\_ [ruby] 
\_ resque-1.15.0: Waiting for *                   
| \_ [ruby] 
\_ resque-1.15.0: Waiting for *                   
| \_ [ruby] 
\_ resque-1.15.0: Waiting for *                   
| \_ [ruby] 
\_ resque-1.15.0: Waiting for *                   
    \_ [ruby] 

無法弄清楚是什麼導致額外的進程啓動？

Answer 1

您不希望在生產中使用COUNT = n選項，因爲它在線程中運行每個工作程序，而不是單獨的進程 - 這非常不穩定。

官方Resque文檔：

Running Multiple Workers 

At GitHub we use god to start and stop multiple workers. A sample god configuration file is included under examples/god. We recommend this method. 

If you'd like to run multiple workers in development mode, you can do so using the resque:workers rake task: 

$ COUNT=5 QUEUE=* rake resque:workers 
This will spawn five Resque workers, each in its own thread. Hitting ctrl-c should be sufficient to stop them all. 

Here's the example God monitoring/configuration file附帶Resque運行多個進程，並here's an example for monit。