Tor Linux relay服务器内存不足引起死机事件的解决
运行Linux平台的Tor relay服务器二星期多，首次发现死机事件，查询日志最后死机前有如下记录：Mar 14 16:20:23 gateway kernel:
运行Linux平台的Tor relay服务器二星期多，首次发现死机事件，查询日志最后死机前有如下记录：
Mar 14 16:20:23 gateway kernel: tor invoked oom-killer: gfp_mask=0×40d0, order=1, oomkilladj=0
Mar 14 16:20:23 gateway kernel: [] out_of_memory+0×69/0×1a7
Mar 14 16:20:23 gateway kernel: [] __alloc_pages+0×21b/0×2a2
Mar 14 16:20:23 gateway kernel: [] __slab_alloc+0×17b/0×49f
Mar 14 16:20:23 gateway kernel: [] tcp_sendmsg+0×172/0xa30
Mar 14 16:20:23 gateway kernel: [] __kmalloc_track_caller+0×5d/0xa9
Mar 14 16:20:23 gateway kernel: [] tcp_sendmsg+0×172/0xa30
记录到这里系统就马上死机了。前段时间就发现Tor relay对内存需求挺大，1G物理内存都被用满了，已经开始占用更多的swap分区。
系统进程里显示其对CPU和内存的占用率都挺不低，，都分别在20%左右：
root 1718 23.6 20.0 294432 207072 Sl 16:27 4:13 /usr/local/bin/tor
看来每过段时间都要重启一下才行。
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