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MySQL Cluster 7.3.23 has been released
Posted by: Piotr Obrzut
Date: October 23, 2018 01:10PM

Dear MySQL Users,

MySQL Cluster is the distributed, shared-nothing variant of MySQL.
This storage engine provides:

  - In-Memory storage - Real-time performance (with optional
    checkpointing to disk)
  - Transparent Auto-Sharding - Read & write scalability
  - Active-Active/Multi-Master geographic replication
  - 99.999% High Availability with no single point of failure
    and on-line maintenance
  - NoSQL and SQL APIs (including C++, Java, http, Memcached
    and JavaScript/Node.js)

MySQL Cluster 7.3.23, has been released and can be downloaded from

where you will also find Quick Start guides to help you get your
first MySQL Cluster database up and running.

The release notes are available from

MySQL Cluster enables users to meet the database challenges of next
generation web, cloud, and communications services with uncompromising
scalability, uptime and agility.

More details can be found at

Enjoy !

Changes in MySQL NDB Cluster 7.3.23 (5.6.42-ndb-7.3.23) (2018-10-23, General Availability)

   MySQL NDB Cluster 7.3.23 is a new release of NDB Cluster,
   based on MySQL Server 5.6 and including features from version
   7.3 of the NDB storage engine, as well as fixing a number of
   recently discovered bugs in previous NDB Cluster releases.

   Obtaining MySQL NDB Cluster 7.3.  MySQL NDB Cluster 7.3
   source code and binaries can be obtained from

   For an overview of changes made in MySQL NDB Cluster 7.3, see
   What is New in NDB Cluster 7.3

   This release also incorporates all bug fixes and changes made
   in previous NDB Cluster releases, as well as all bug fixes
   and feature changes which were added in mainline MySQL 5.6
   through MySQL 5.6.42 (see Changes in MySQL 5.6.42 (Not yet
   released, General Availability)

Bugs Fixed

     * Having a large number of deferred triggers could
       sometimes lead to job buffer exhaustion. This could occur
       due to the fact that a single trigger can execute many
       operations---for example, a foreign key parent trigger
       may perform operations on multiple matching child table
       rows---and that a row operation on a base table can
       execute multiple triggers. In such cases, row operations
       are executed in batches. When execution of many triggers
       was deferred---meaning that all deferred triggers are
       executed at pre-commit---the resulting concurrent
       execution of a great many trigger operations could cause
       the data node job buffer or send buffer to be exhausted,
       leading to failure of the node.
       This issue is fixed by limiting the number of concurrent
       trigger operations as well as the number of trigger fire
       requests outstanding per transaction.
       For immediate triggers, limiting of concurrent trigger
       operations may increase the number of triggers waiting to
       be executed, exhausting the trigger record pool and
       resulting in the error Too many concurrently fired
       triggers (increase MaxNoOfFiredTriggers. This can be
       avoided by increasing MaxNoOfFiredTriggers, reducing the
       user transaction batch size, or both. (Bug #22529864)
       References: See also: Bug #18229003, Bug #27310330.

On Behalf of Oracle/MySQL Release Engineering Team
Piotr Obrzut

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MySQL Cluster 7.3.23 has been released
October 23, 2018 01:10PM

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