Dedicated Server How to Optimize MySQL

Dedicated Server How to Optimize MySQL

IMPORTANT

1. Always make full backups of all of your databases before making any changes to your dedicated server my.cnf.
2. Avoid changes to your InnoDB settings unless you are very familiar with making those changes. Many of the InnoDB settings must remain the same else data corruption will occur with your InnoDB tables. We do not recommend making any changes to your InnoDB settings, unless you do so before creating your databases.
3. Optimizing MySQL is not that easy, it may require more tryouts from you and adjustments based on queries type, amount of memory on a server etc. etc.

CentOS Dedicated Server

There is a default my.cnf on your dedicated server that comes with MySQL (4+5) that will make MySQL run a bit quicker if you have 2+ gig of ram

cp -f /usr/share/mysql/my-large.cnf /etc/my.cnf

NOTE 1 the log-bin option is enabled by default. This will quickly use a lot of disk space. It’s recommended to comment out the log-bin line from your /etc/my.cnf, if it exists.

NOTE 2 Take note of your old /etc/my.cnf file. If you have innodb_file_per_table=1, make sure the new my.cnf you install also has this setting. Similarly, if your old one does not have innodb_file_per_table=1 enabled, then your new my.cnf should also not have it enabled. If the new my.cnf has a different setting for innodb_file_per_table, then it may corrupt your data.

Be sure to make full backups of your .sql files before doing any changes to your my.cnf.

Debian Dedicated Server

We don’t currently have optimized my.cnf files for these OSs. The /etc/my.cnf will rely on the internal defaults in the mysqld binaries.

I have many mysql-bin files which are using up a lot of space

If your MySQL data directory has many files such as:

mysql-bin.000001
mysql-bin.000002
...

log-bin=mysql-bin

The solution to prevent those files from being created is to comment out the log-bin option from the my.cnf by adding at # character at the start of the line (left side).

The internal default is “OFF”, hence removing it will disable it.

You can delete your mysql-bin.0* files after mysqld has been restarted. Read more