錯誤現象：
es 服務啓動後日志報錯如下：
```2017/12/23 下午1:45:05[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
2017/12/23 下午1:45:05[2017-12-23T05:41:49,242][INFO ][o.e.n.Node ] [eMPJsvt] stopping ...
2017/12/23 下午1:45:05[2017-12-23T05:41:49,291][INFO ][o.e.n.Node ] [eMPJsvt] stopped
2017/12/23 下午1:45:05[2017-12-23T05:41:49,291][INFO ][o.e.n.Node ] [eMPJsvt] closing ...
2017/12/23 下午1:45:05[2017-12-23T05:41:49,336][INFO ][o.e.n.Node ] [eMPJsvt] closed
2017/12/23 下午1:45:05[2017-12-23T05:42:20,245][INFO ][o.e.n.Node ] [] initializing
### 解決辦法：
sysctl -w vm.max_map_count=262144