Innodb Support Xa Sync Binlog

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What is innodb_support_xa? - Percona Database Performance Blog

    https://www.percona.com/blog/2011/03/02/what-is-innodb_support_xa/
    Mar 03, 2011 · Hi, Thank you for this very interresting post. Strangely, the following sentence : “Having innodb_support_xa enabled on a replication master—or on any MySQL server where binary logging is in use—ensures that the binary log does not get out of sync compared to the table data.

In MySQL, why is it safe to turn off innodb_support_xa for ...

    https://stackoverflow.com/questions/6067093/in-mysql-why-is-it-safe-to-turn-off-innodb-support-xa-for-single-threaded-updat
    Nov 22, 2011 · write innodb log and fsync, for prepare-phase (skip if innodb_support_xa=0) obtain mutex write binlog (fsync as appropriate if sync_binlog > 0) write innodb log, for commit-phase release mutex fsync innodb log, for commit-phase As you can see, in the new version, nothing (except in case sync_binlog > 0) is fsync'd in the critical section. That ...

MySQL :: MySQL 5.7 Reference Manual :: 14.15 InnoDB ...

    https://dev.mysql.com/doc/refman/5.7/en/innodb-parameters.html
    The innodb_flush_sync variable, which is enabled by default, causes the innodb_io_capacity setting to be ignored during bursts of I/O activity that occur at checkpoints. To adhere to the I/O rate defined by the innodb_io_capacity setting, disable innodb_flush_sync.

MySQL Bugs: #81800: sync_binlog and innodb_support_xa ...

    https://bugs.mysql.com/bug.php?id=81800
    In fact, according to sql/binlog.cc, the order of operations is different. The binary log is the source of truth when innodb_support_xa is enabled (the default and the recommended when binary log is ON).

Binary Log Group Commit and InnoDB Flushing Performance ...

    https://mariadb.com/kb/en/binary-log-group-commit-and-innodb-flushing-performance/
    If innodb_flush_log_at_trx_commit=1 is set and the binary log is enabled, but sync_binlog=0 is set, then commits are not guaranteed durable inside InnoDB after commit. This is because if sync_binlog=0 is set and if the server crashes, then transactions that were not flushed to the binary log prior to the crash will be missing from the binary log.

sync_binlog = 1 in MySQL 5.7 – lefred's blog: tribulations ...

    https://lefred.be/content/sync_binlog-1-in-5-7/
    Jun 13, 2016 · setting sync_binlog & innodb_support_xa to 1 is required for maintaining the acidity of your database when using replication (make sure that your storage is able to deal with a large amount of sync to disk, fdatasync).

14.17 InnoDB Startup Options and System Variables - MySQL

    https://dev.mysql.com/doc/refman/5.5/en/innodb-parameters.html
    14.17 InnoDB Startup Options and System Variables This section describes the InnoDB -related command options and system variables. System variables that are true or false can be enabled at server startup by naming them, or disabled by using a --skip- prefix.

MySQL :: MySQL 5.6 Reference Manual :: 14.14 InnoDB ...

    https://dev.mysql.com/doc/refman/5.6/en/innodb-parameters.html
    Enabling innodb_locks_unsafe_for_binlog does not disable the use of gap locking for foreign-key constraint checking or duplicate-key checking. The effects of enabling innodb_locks_unsafe_for_binlog are the same as setting the transaction isolation level to READ COMMITTED, with these exceptions:

mysql - Is it safe to use innodb_flush_log_at_trx_commit ...

    https://dba.stackexchange.com/questions/12611/is-it-safe-to-use-innodb-flush-log-at-trx-commit-2
    The innodb_flush_log_at_trx_commit is used with the purpose as .. If the value of innodb_flush_log_at_trx_commit is 0, the log buffer is written out to the log file once per second and the flush to disk operation is performed on the log file, but nothing is done at a transaction commit.

Bug #28714 Doc: innodb_safe_binlog and innodb_support_xa

    https://bugs.mysql.com/28714
    Description: I know innodb_safe_binlog is obsolete, after innodb_support_xa was inplemented in 5.0.3. (quoted from the reference manual) > innodb_safe_binlog > Adds consistency guarantees between the content of InnoDB > tables and the binary log.



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