tomcat挂掉,系统内核日志:
java: page allocation failure. order:0, mode:0x20
...
Out of memory: Kill process 5869 (java) score 895 or sacrifice child
Linux会对进程进行管理,内存不足就会杀掉
http://blog.youkuaiyun.com/guomsh/article/details/6536915
http://wiki.skytech.dk/index.php/Page_allocation_failure._order:0,_mode:0x20