如何安装mongodb请参考前一篇文章《mongodb在Linux下的安装》

mongod服务启动之后，我们该启动客户端，./bin/mongo

这个时候其实已经启动成功了，但是会出现一些警告性的错误：

MongoDB shell version: 3.0.6

connecting to: test

Server has startup warnings:

2015-08-28T15:29:38.513+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.

2015-08-28T15:29:38.513+0800 I CONTROL  [initandlisten]

2015-08-28T15:29:38.541+0800 I CONTROL  [initandlisten]

2015-08-28T15:29:38.541+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2015-08-28T15:29:38.541+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2015-08-28T15:29:38.541+0800 I CONTROL  [initandlisten]

2015-08-28T15:29:38.541+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2015-08-28T15:29:38.541+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2015-08-28T15:29:38.541+0800 I CONTROL  [initandlisten]

2015-08-28T15:29:38.541+0800 I CONTROL  [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 1024 processes, 65535 files. Number of processes should be at least 32767.5 : 0.5 times number of files

 

我们在此先不管第一个root用户的警告问题。

解决办法：

echo "never" > /sys/kernel/mm/transparent_hugepage/enabled

echo "never" > /sys/kernel/mm/transparent_hugepage/defrag

 

Mongodb建议ulimit设置：

-f (file size): unlimited

-t (cpu time): unlimited

-v (virtual memory): unlimited

-n (open files): 64000

-m (memory size): unlimited

-u (processes/threads): 64000

所以：

uimit -f unlimited

uimit -t unlimited

uimit -v unlimited

uimit -m unlimited

uimit  -n  64000

uimit  -u  64000