MariaDB XA Transaction Support Explained
In this SQL tutorial we'll explain a variable related to XA transaction support in MariaDB Server.
This SQL variable is called "innodb_support_xa."
Remember that XA transactions let us perform operations on multiple SQL databases with a single SQL transaction.
What you should also know is that MariaDB XA transaction support can be disabled. To disable XA transactions set the "innodb_support_xa" SQL variable to "0". This SQL variable is in place because XA support for MariaDB server means that data written to the SQL database will be written to the binary log in the same order.
Such an approach may be beneficial when investigating MariaDB server errors, crashes, etc. However, leaving XA support on may have a drawback on database performance.
If you've already enabled XA transactions in Percona XtraDB or InnoDB and see that your database performance is diving, turn XA support off with this variable.
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