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Issue #439 #442

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ceb161b
Issue #439
kirjaamo Aug 7, 2024
3028b5a
Issue 439
kirjaamo Aug 7, 2024
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53 changes: 52 additions & 1 deletion galeracluster/source/documentation/mysql-wsrep-options.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -75,6 +75,7 @@ and an explanation.
:header: "|br| Option", "|br| Default Value", "|br| Global ", "|br| Dynamic"
:widths: 30, 30, 12, 12
":ref:`innodb-wsrep-applier-lock-wait-timeout <innodb-wsrep-applier-lock-wait-timeout>`", "``0``", "Yes", "Yes"
":ref:`plugin_wsrep_provider <plugin_wsrep_provider>`", "ON", "Yes", ""
":ref:`wsrep_applier_FK_failure_retries <wsrep_applier_FK_failure_retries>`", "``1``", "Yes", "Yes"
":ref:`wsrep_auto_increment_control <wsrep_auto_increment_control>`", "``ON``", "Yes", ""
":ref:`wsrep_causal_reads <wsrep_causal_reads>`", "``OFF``", "", ""
Expand Down Expand Up @@ -183,6 +184,56 @@ You can execute the following ``SHOW VARIABLES`` statement to see how this varia
| innodb-wsrep-applier-lock-wait-timeout | 10 |
+----------------------------------------+-------+


.. _`plugin_wsrep_provider`:
.. rst-class:: section-heading
.. rubric:: ``plugin_wsrep_provider``

.. index::
pair: Parameters; plugin_wsrep_provider

Defines optional settings the node passes to the wsrep Provider.

.. csv-table::
:class: doc-options

"Command-line Format", "``--plugin_wsrep_provider``"
"System Variable", "``plugin_wsrep_provider``"
"Variable Scope", "Global"
"Dynamic Variable", ""
"Permitted Values", "String"
"Default Value", "ON"
"Valied Values", "ON, OFF"
"Initial Version", "MySQL-wsrep: 8.4.2, MariaDB: 11.x"

When this option is enabled, the node loads the wsrep Provider configuration options through the ``plugin_wsrep_provider`` plugin, instead of using ``wsrep_provider_options`` options. ``wsrep_provider_options`` options can no longer be used.

The configuration required to use ``plugin_wsrep_provider``:

.. code-block:: mysql

wsrep-on=ON
wsrep-cluster-address=gcomm://
wsrep-provider=@ENV.WSREP_PROVIDER
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Where did you get this from? I have not personally used this, but might have to give it a go

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ref: https://jira.mariadb.org/browse/MDEV-22570

plugin-wsrep-provider=ON

Often it is not optimal to use a system variable, that is, one large string, for a long list of options. Instead, it would be better to separate the different options into separate cluster system variables.

When this option is disabled, the node loads the wsrep Provider configuration options from ``wsrep_provider_options`` options.

For more information on the wsrep Provider options, see :doc:`galera-parameters` and :ref:`wsrep_provider_options <wsrep_provider_options>`.

.. code-block:: mysql

SHOW VARIABLES LIKE 'plugin_wsrep_provider';

+------------------------+-----------------------------------------------+
| Variable_name | Value |
+------------------------+-----------------------------------------------+
| plugin_wsrep_provider | ON |
+------------------------+-----------------------------------------------+


.. _`wsrep_applier_FK_failure_retries`:
.. rst-class:: section-heading
.. rubric:: ``wsrep_applier_FK_failure_retries``
Expand Down Expand Up @@ -1380,7 +1431,7 @@ For example, you can use :ref:`gcache.size <gcache.size>` to define how large a

.. note:: All ``wsrep_provider_options`` settings need to be specified on a single line. In case of multiple instances of ``wsrep_provider_options``, only the last one is used.

For more information on the wsrep Provider options, see :doc:`galera-parameters`.
For more information on the wsrep Provider options, see :doc:`galera-parameters` and :ref:`plugin_wsrep_provider <plugin_wsrep_provider>`.

.. code-block:: mysql

Expand Down