MySQL Daemon Failed to Start - centos 6

Question

EDIT: Look at the checkmarked answer comments to get your issue solved.

Whenever I try to start the SQLD service I get MySQL Daemon Failed to Start. I infact tried

Answer 1

Yet another tip that worked for me. Run the command:

$ mysql_install_db

Answer 2

If you are using yum in AIM Linux Amazon EC2. For security, make a backup complete of directory /var/lib/mysql

sudo yum reinstall -y mysql55-server

sudo service mysqld start

Answer 3

Your database was shut down because of insufficient memory！ You can edit the file my.cnf base below graph to resolve it

performance_schema_max_table_instances=200
table_definition_cache=200
table_open_cache=128

Answer 4

You may need free up some space from root (/) partition. Stop mysql process by:

/etc/init.d/mysql stop

Delete an unused database from mySql by command:

rm -rf [Database-Directory]

Execute it in /var/lib/mysql. Now if you run df -h, you may confused by still full space. For removing the unused database 's directory to be affected, you need to kill processes are using current directory/partition.

Stopping mysql_safe or mysqld_safe and then mysqld:

ps -A

Then find mysql's process number (e.g. 2234). Then execute:

kill 2234

Now start again mysql:

/etc/init.d/mysql start