- Always make full backups of all of your databases before making any changes to your my.cnf.
- 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.
There is a default my.cnf 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
There is also my-huge.cnf, or my-medium.cnf depending on your hardware setup. Check the contents of these my*.cnf files for the one that's right for you.
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.
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.
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.
CentOS and MySQL 5.6
New MySQL installs might not have any included my-*.cnf files.
We've added a few from MySQL 5.5 which seem to work with 5.6, eg:
cp /etc/my.cnf /etc/my.cnf.old
wget -O /etc/my.cnf http://files.directadmin.com/services/all/mysql/my-huge-5.5.cnf
- Depreciated - DO NOT USE
If you've got mysql 4 (and not mysql 5), then you can use the following code in your /etc/my.cnf:
Referenced from the Forum
vi /etc/my.cnf [ENTER]
Press 'i' to enter insert mode, then paste:
# Try number of CPU's*2 for thread_concurrency
Press ctrl-c to exit insert mode. Then press shift-Z shift-Z to save and quit. Restart mysqld:
/sbin/service mysqld restart