Mongodb 啟動報錯:/sys/kernel/mm/transparent_hugepage/enabled is always

系統環境

[code]Distributor ID: CentOS
Description:    CentOS release 6.7 (Final)
Release:    6.7
Codename:   Final

問題描述

在系統上安裝mongodb之後報錯。
(安裝教程地址: https://docs.mongodb.com/master/tutorial/install-mongodb-on-red-hat/)
錯誤信息:
WARNING: /sys/kernel/mm/transparent_hugepage/enabled is ‘always’.We suggest setting it to ‘never’
WARNING: /sys/kernel/mm/transparent_hugepage/defrag is ‘always’.We suggest setting it to ‘never’
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.
如圖：

解決方案

前兩個warning

[code]sudo echo "never" > /sys/kernel/mm/transparent_hugepage/enabled
sudo echo "never" >  /sys/kernel/mm/transparent_hugepage/defrag

第三個warning

[code]vim /etc/security/limits.conf
添加一下幾行
mongod  soft  nofile  64000
mongod  hard  nofile  64000
mongod  soft  nproc  32000
mongod  hard  nproc  32000

重啟mongod

[code]sudo service mongod restart

成功

重啟成功之後，所有報錯都沒啦，如下

[code]➜  ~ git:(master) mongo
MongoDB shell version: 3.2.6
connecting to: test
>