系统杀进程

当系统内存不足，会随机杀进程，以保证系统正常运行。

[root@VM_3_2_centos files2]# dmesg | tail
[437421.447859] [25087]     0 25087   141212    25226   0       0             0 xxx
[437421.447861] [25321]     0 25321    25491      150   0       0             0 YDLive
[437421.447863] [25343]     0 25343     1016       43   1       0             0 mingetty
[437421.447865] [25344]     0 25344     1016       44   0       0             0 mingetty
[437421.447867] [25345]     0 25345     1016       43   0       0             0 mingetty
[437421.447868] [25346]     0 25346     1016       43   0       0             0 mingetty
[437421.447870] [25347]     0 25347     1016       44   0       0             0 mingetty
[437421.447873] [25348]     0 25348     1016       42   0       0             0 mingetty
[437421.447874] Out of memory: Kill process 4830 (xxx) score 1 or sacrifice child
[437421.447878] Killed process 4830, UID 0, (xxx) total-vm:952616kB, anon-rss:21920kB, file-rss:1400kB

　　在系统信息里可以看到相关杀进程信息。