https://blog.csdn.net/zchoney/article/details/104059143
运行中的程序突然出现"Killed"原因
Dinterest 2020-01-21 10:20:12 
2962 
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2962 收藏最近在做性能测试，大量数据进行测试时进程突然中止，出现 "Killed" 提示。
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[root@Thor msg]# ./Msg
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Killed
查阅资料发现了原因：
原因：程序内存上限超出后被kill掉
Linux 内核有个机制叫OOM killer(Out Of Memory killer)，该机制会监控那些占用内存过大，尤其是瞬间占用内存很快的进程，然后防止内存耗尽而自动把该进程杀掉。
那如何查看被系统Kill掉的进程？
需要借助系统日志信息进行查看。
[root@Thor record]# grep "Out of memory" /var/log/messages Jan 17 15:03:08 localhost kernel: Out of memory: Kill process 7863 (Server) score 149 or sacrifice child Jan 17 17:04:55 localhost kernel: Out of memory: Kill process 11449 (Msg) score 334 or sacrifice child Jan 17 18:24:29 localhost kernel: Out of memory: Kill process 34225 (Msg) score 334 or sacrifice child Jan 19 11:05:09 Thor kernel: Out of memory: Kill process 32249 (Msg) score 325 or sacrifice child
[root@Thor msg]# egrep -i -r 'killed process' /var/log /var/log/messages:Jan 17 15:03:08 localhost kernel: Killed process 7863 (Server), UID 0, total-vm:51731832kB, anon-rss:20205220kB, file-rss:170520kB, shmem-rss:12288kB /var/log/messages:Jan 17 17:04:55 localhost kernel: Killed process 11449 (Msg), UID 0, total-vm:70144784kB, anon-rss:48144592kB, file-rss:0kB, shmem-rss:0kB /var/log/messages:Jan 17 18:24:29 localhost kernel: Killed process 34225 (Msg), UID 0, total-vm:69800712kB, anon-rss:48174008kB, file-rss:0kB, shmem-rss:0kB /var/log/messages:Jan 19 11:05:09 Thor kernel: Killed process 32249 (Msg), UID 0, total-vm:68817672kB, anon-rss:46874480kB, file-rss:0kB, shmem-rss:0kB