切换了多种多线程的写法最后都会偶尔出现Killed现象
定位日志
/var/log/
egrep -i 'killed process' /var/log/syslog
查看具体kill的原因，发现是系统自我保护的结果
localhost kernel: [1733935.497845] Out of memory: Killed process 458784 (python3) total-vm:2445352kB, anon-rss:1428176kB, file-rss:2164kB, shmem-rss:0kB, UID:0 pgtables:2932kB oom_score_adj:0
解决具体吃内存的问题即可
