Shulou(Shulou.com)06/01 Report--

Official installation manual

Http://docs.mongodb.org/manual/tutorial/install-mongodb-on-red-hat/

After the installation is complete, the login appears with the following alarm:

1. Log in to mongo shell

[root@localhost ~] # mongo

Missing openssl, libssh3

Yum-y install opensslservice mongod restart

2.I use mongodb 3.0 and find a warning:

[root@localhost] # mongoMongoDB shell version: testServer has startup warnings: 2015-03-13T16:28:29.405+0800 I CONTROL [initandlisten] 2015-03-13T16:28:29.406+0800 I CONTROL [initandlisten] * * WARNING: / sys/kernel/mm/transparent_hugepage/enabled is' always'.2015-03-13T16:28:29.406+0800 I CONTROL [initandlisten] * * We suggest setting it to 'never'2015-03-13T16:28: 29.406 '0800 I CONTROL [initandlisten] 2015-03-13T16:28:29.407+0800 I CONTROL [initandlisten] * * WARNING: / sys/kernel/mm/transparent_hugepage/defrag is' always'.2015-03-13T16:28:29.407+0800 I CONTROL [initandlisten] * * We suggest setting it to 'never'2015-03-13T16:28:29.407+0800 I CONTROL [initandlisten]

Solved:

Add if test-f / sys/kernel/mm/transparent_hugepage/enabled; then echo never > / sys/kernel/mm/transparent_hugepage/enabledfiif test-f / sys/kernel/mm/transparent_hugepage/defrag; then echo never > / sys/kernel/mm/transparent_hugepage/ defragf to restart mongodservice mongod restart at the beginning of the vi / etc/init.d/mongod# line

3.Recommended ulimit Settings

Every deployment may have unique requirements and settings; however, the following thresholds and settings are particularly important for mongod and mongos deployments:

-f (file size): unlimited

-t (cpu time): unlimited

-v (virtual memory): unlimited [1]

-n (open files): 64000

-m (memory size): unlimited [1] [2]

-u (processes/threads): 64000

Always remember to restart your mongod and mongos instances after changing the ulimit settings to ensure that the changes take effect.

Vi / etc/profile

Add at the end

Ulimit-n 64000

Ulimit-u 64000

Source / etc/profile

2015-04-02T01:36:21.150-0700 I CONTROL [initandlisten] 2015-04-02T01:36:21.150-0700 I CONTROL [initandlisten] * WARNING: soft rlimits too low. Rlimits set to 1024 processes, 64000 files. Number of processes should be at least 32000: 0.5 times number of files.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.