今天在检查服务器是发现messages日志中有很多形如last message repeated N times的提示。如下：
Jun 2 19:43:46 server last message repeated 7 times
Jun 2 19:44:47 server last message repeated 3 times
Jun 2 19:46:17 server last message repeated 5 times
Jun 2 19:47:23 server last message repeated 7 times
Jun 2 19:48:41 server last message repeated 5 times
Jun 2 19:50:37 server...