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121 lines
3.7 KiB
ReStructuredText
121 lines
3.7 KiB
ReStructuredText
.. _my_cnf:
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******
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my.cnf
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******
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``my.ini`` changes are global to all projects, but will only affect the currently selected
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MySQL version.
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.. important::
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When using :ref:`howto_docker_toolbox_and_the_devilbox` on Windows, ``*.cnf`` files must have read-only file
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permissions, otherwise they are not sourced by the MySQL server.
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Make sure to ``chmod 0444 *.cnf`` after adding your values.
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**Table of Contents**
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.. contents:: :local:
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General
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=======
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You can set custom MySQL options via your own defined ``my.cnf`` files for each version separately.
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See the directory structure for MySQL configuration directories inside ``./cfg/`` directory:
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.. code-block:: bash
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host> ls -l path/to/devilbox/cfg/ | grep -E 'mysql|mariadb|percona'
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 mariadb-10.0/
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 mariadb-10.1/
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 mariadb-10.2/
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 mariadb-10.3/
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 mysql-5.5/
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 mysql-5.6/
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 mysql-5.7/
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 mysql-8.0/
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 percona-5.5/
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 percona-5.6/
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drwxr-xr-x 2 cytopia cytopia 4096 Mar 5 21:53 percona-5.7/
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Customization is achieved by placing a file into ``cfg/mysql-X.X/``, ``cfg/mariadb-X.X/`` or
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``cfg/percona-X-X`` (where ``X.X`` stands for your MySQL version).
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The file must end by ``.cnf`` in order to be sourced by the MySQL server.
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Each of the MySQL cnf configuration directories already contain an example file:
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``devilbox-custom.cnf-example``, that can simply be renamed to ``devilbox-custom.cnf``.
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This file holds some example values that can be adjusted or commented out.
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In order for the changes to be applied, you will have to restart the Devilbox.
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Examples
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========
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Change key_buffer_size for MySQL 5.5
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------------------------------------
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The following examples shows you how to change the
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`key_buffer_size <https://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html#sysvar_key_buffer_size>`_
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of MySQL 5.5 to 16 MB.
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.. code-block:: bash
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# Navigate to the Devilbox directory
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host> cd path/to/devilbox
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# Navigate to MySQL 5.5 config directory
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host> cd cfg/mysql-5.5
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# Create new cnf file
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host> touch key_buffer_size.cnf
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Now add the following content to the file:
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.. code-block:: ini
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:caption: memory_limit.cnf
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[mysqld]
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key_buffer_size=16M
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In order to apply the changes you need to restart the Devilbox.
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You can validate that the changes have taken place by visiting the Devilbox intranet MySQL info page.
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Change timeout and packet size for PerconaDB 5.7
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------------------------------------------------
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The following examples shows you how to change the
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`wait_timeout <https://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html#sysvar_wait_timeout>`_
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and
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`max_allowed_packet <https://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html#sysvar_max_allowed_packet>`_
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of PerconaDB 5.7
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.. code-block:: bash
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# Navigate to the Devilbox directory
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host> cd path/to/devilbox
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# Navigate to PerconaDB 5.7 config directory
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host> cd cfg/percona-5.7
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# Create new ini file
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host> touch timeouts.cnf
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Now add the following content to the file:
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.. code-block:: ini
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:caption: timeouts.cnf
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[mysqld]
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max_allowed_packet=256M
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wait_timeout = 86400
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In order to apply the changes you need to restart the Devilbox.
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You can validate that the changes have taken place by visiting the Devilbox intranet MySQL info page.
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