Category Archives: Replication

One year of MySQL Replication Contributions

Since January 2017, the MySQL Replication Team has been involved in processing many Community Contributions !

We are really happy to receive contributions (and not only in the replication team), but this also implies a lot of work from our engineers, as more than resolving a bug or developing a new feature, code contributions need to be analyzed, the code needs to be understood and validated.…

Replication Features in MySQL 8.0.4

MySQL 8 second release candidate is out (MySQL 8.0.4). Besides fixes to replication issues we have also delivered a couple of enhancements in this release. Let me quickly summarize them.

  • Additional instrumentation for Group Replication (WL#9856). We have instrumented mutexes and condition synchronization objects on the group communication library.

Group Replication Features backported to MySQL 5.7

We have brought further enhancement to MySQL Group Replication 5.7 release by backporting some most requested features to MySQL 5.7.20 release:

  • Member weight for automatic primary election on failover
  • Disallow writes after leaving the group

And to MySQL 5.7.19 release:

  • Transaction savepoint support


Member weight for automatic primary election on failover

The Member weight for automatic primary election on failover feature will allow user to influence primary member election using a integer member weight value.…

MySQL 8.0.3: Binary logging and Replication chains are now enabled by default

MySQL 8.0.3 release candidate is out with amazing new replication features, along with changes in couple of replication default options. Thanks to our users for their constant feedback and valuable inputs, MySQL is changing defaults whenever possible to remove configuration overhead for practical deployment of MySQL server.…

“Look: I/O thread is waiting for disk space!”

MySQL 8.0.1 introduced a work with replication threads mutexes in order to improve performance. In MySQL 8.0.2 the same work was extended, focusing in usability, and revamped how replication deals with disk-full conditions, improving the responsiveness of both monitoring commands and administrative commands such as KILL, as well as making status messages much more precise and helpful.…