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https://www.percona.com/blog/2011/03/02/what-is-innodb_support_xa/
Mar 03, 2011 · A common misunderstanding about innodb_support_xa is that it enables user-initiated XA transactions, that is, transactions that are prepared and then committed on multiple systems, with an external transaction coordinator. This is actually not precisely what this option is for. It enables two-phase commit in InnoDB (prepare, then commit). This is necessary not only for user-initiated …
https://dev.mysql.com/doc/refman/5.7/en/innodb-parameters.html
innodb_large_prefix is deprecated and will be removed in a future release. innodb_large_prefix was introduced to disable large index key prefixes for compatibility with earlier versions of InnoDB that do not support large index key prefixes. innodb_limit_optimistic_insert_debug
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-tuning.html
Measure performance with different innodb_flush_method settings. Note innodb_support_xa is deprecated and will be removed in a future release. As of MySQL 5.7.10, InnoDB support for two-phase commit in XA transactions is always enabled and disabling innodb_support_xa is no longer permitted. For other ways to reduce or tune I/O for table ...
https://dzone.com/articles/what-innodbsupportxa
If you do not wish to use XA transactions, you can disable this variable to reduce the number of disk flushes and get better InnoDB performance. Having innodb_support_xa enabled on a replication ...
https://softwaredevelopmentreviews.com/what-is-innodb_support_xa/
Mar 04, 2011 · A common misconception about innodb_support_xa is that it allows for user-initiated XA-transactions are transactions that have been drawn up, and then committed on multiple systems with an external transaction coordinator. In fact, it is not precisely this option is for. It enables the two-phase commit protocol in InnoDB (prepare, and then commit). It is necessary …
https://dev.mysql.com/doc/refman/8.0/en/xa-restrictions.html
XA transaction support is limited to the InnoDB storage engine. For “ external XA, ” a MySQL server acts as a Resource Manager and client programs act as Transaction Managers. For “ Internal XA ”, storage engines within a MySQL server act as RMs, and the server itself acts as a TM.Internal XA support is limited by the capabilities of individual storage engines.
https://dev.mysql.com/doc/refman/5.7/en/optimizing-innodb-transaction-management.html
InnoDB tries to flush the log once per second anyway, although the flush is not guaranteed. Also, set the value of innodb_support_xa to 0, which will reduce the number of disk flushes due to synchronizing on disk data and the binary log.
https://dev.mysql.com/doc/refman/5.6/en/innodb-parameters.html
The --innodb-status-file option is intended for temporary use, as SHOW ENGINE INNODB STATUS output generation can affect performance, and the innodb_status.pid file can become quite large over time. For related information, see Section 14.17.2, “Enabling InnoDB Monitors”.
https://mariadb.com/kb/en/xa-transactions/
In MariaDB, XA transactions can only be used with storage engines that support them. At least InnoDB, TokuDB, SPIDER and MyRocks support them. For InnoDB, XA transactions can be disabled by setting the innodb_support_xa server system variable to 0. Like regular transactions, XA transactions create metadata locks on accessed tables.
https://stackoverflow.com/questions/6067093/in-mysql-why-is-it-safe-to-turn-off-innodb-support-xa-for-single-threaded-updat
Nov 22, 2011 · As consistency in terms of operation ordering is guaranteed independent of the innodb_support_xa setting (which contradicts what's said in the official doc on innodb_support_xa, maybe because it was written about the stock innodb 5.0.3 far before the concurrency fix), and consistency between innodb log on the master and relay log on the slave ...
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