Joro wrote recently about MySQL 5.6.17‘s new support for AES-256 encryption, and it’s a great improvement for people need to encrypt their data at rest.  The new session block_encryption_mode variable controls what variant of AES is used, and for backwards compatibility, the default behavior remains 128-bit key length with ECB block cipher mode.  If you’re happy with that level of encryption, nothing changes – your existing code will work the same on 5.6.17 as it has on earlier versions (note that users of statement-based replication will experience new warnings).  There are good examples of how to use …

Today new version of JSON UDF functions: 0.3.1 was released. This is development release which contains new functionality. You can download functions from the MySQL Labs website.

What is new?

Default value for compile option `WITH_PCRE` now is `bundled` independently from the
platform (Bug #71265/18081332 Library name mismatch for PCRE on Ubuntu)

New values, passed to functions `JSON_APPEND`, `JSON_REPLACE`, `JSON_SET` as numbers, empty strings or `NULL`s are converted to JSON objects. Objects, passed as strings are not converted: you are still responsible to put quotes around string values. Also these functions check if element which needs to be inserted is valid JSON value. (Bug #70394/17491708 MySQL JSON UDFs: …

At Percona Live, Steaphan Greene and I will talk about MySQL 5.6 and WebScaleSQL at Facebook.

2 April 1:20PM - 2:10PM @ Ballroom E
http://www.percona.com/live/mysql-conference-2014/sessions/mysql-56-facebook-2014-edition

In addition to that, I have two more talks this year.


Performance Monitoring at Scale
3 April 2:00PM - 2:50PM @ Ballroom G
http://www.percona.com/live/mysql-conference-2014/sessions/performance-monitoring-scale


Global Transaction ID at Facebook
4 April …

The MySQL Windows Experience Team is proud to announce the release of MySQL for Excel version 1.2.1.

MySQL for Excel 1.2.1 is a maintenance release for 1.2.x containing a handful of bug fixes and the following minor features:

• When MySQL Workbench is not installed, MySQL connections are now automatically created for discovered MySQL services. If MySQL Workbench is later installed, these connections are not migrated over to MySQL Workbench as MySQL Workbench also creates connections for discovered MySQL services.

You can download MySQL for Excel 1.2.1 from our official Downloads page at http://dev.mysql.com/downloads/windows/excel as a standalone MSI, and it will be available shortly in the MySQL Installer for Windows that can be downloaded from …

I will be speaking about MySQL at the Bulgarian Oracle Users Group's Spring Conference.

In furthering my mission to increase the MySQL knowledge among my countrymen I will try to give the grand tour of all the modern MySQL administrative and development tools that the MySQL team provides.

This will be the 3d BGOUG conference I'm speaking to. And I expect no less than the stellar organization and the great audience that I had the privilege to interact with during the previous 2 conferences.

We had a lot of fun too ! Parties from the last 2 conferences are …

We recently hosted a live webinar covering advanced MySQL Replication topics as well as the latest developments. The webinar charts and replay are now available here. Below, you’ll find the questions raised by the audience together with the responses given.

More details on what was covered…

The biggest Web sites in the world rely on MySQL Replication to scale-out and provide High Availability for their data. Extend your knowledge of how MySQL Replication works and what you can achieve with it; join us for this technical webinar to explore some of the more advanced replication architectures as well as some of the latest product developments:

• Replication …

We have seen TokuDB lock escalation stall the execution of SQL operations for tens of seconds. To address this problem, we changed the lock escalation algorithm used by TokuDB and TokuMX so that the cost of lock escalation only affects big transactions. We also eliminated a serialization point when running lock escalation.

Transactions in TokuDB and TokuMX accumulate locks on key ranges while they execute. These locks allow multiple transactions to run concurrently. The locks are released when the transaction commits or aborts.

The locks are stored in an in memory data structure that contains a set of key range and transaction identifier pairs. Since the locks are stored in memory and we want to support arbitrarily large transactions, an algorithm is needed to kick in when the amount of memory used to store locks exceeds a maximum limit. The limit is set when the server is started. The lock escalation algorithm shrinks the total …

OPTIMIZE TABLE is a maintenance operation used to recover the disk space and improve IO efficiency. It is recommended that the operation is carried out under the cases noted in the optimize table documentation.

MySQL versions prior to MySQL 5.6.17 does not allow concurrent changes (inserts, updates, deletes) to the table when the OPTIMIZE TABLE operation is being performed on that table. This causes downtime for user applications and is relatively high for large tables.

OPTIMIZE TABLE for INNODB or PARTITIONED INNODB tables used ALTER TABLE FORCE operation internally to address the fragmentation problem prior to MySQL 5.6.17. This involves doing a table copy and taking a strong lock in the SQL-layer which blocks all concurrent changes to the table, thus causing the downtime.

MySQL supports online rebuild of tables within the storage …

Facebook, the undisputed king of online social networks, has 1.23 billion monthly active users collectively contributing to an ocean of data-intensive tasks – making the company one of the world’s top MySQL users.

A small army of Facebook MySQL experts will be converging on Santa Clara, Calif. next week where several of them are leading sessions at the Percona Live MySQL Conference and Expo. I had the chance to chat virtually with four of them about their sessions: Steaphan Greene, Evan Elias, …

March 27, 2014 By Severalnines

With datacenters being stretched by resource-intensive applications, more and more businesses are outgrowing their existing in-house capacity and having to reconfigure their IT operations. But how do you migrate a busy application to a totally new data center without downtime? How will the application scale in a virtualized cloud environment? And how do you guard against cloud server failures and keep a high level of uptime?

In this example, we will show you how to migrate a Web application (Wordpress) from a local data center to a AWS VPC. Without downtime even! 

Main steps:

• Setup the cloud servers (for web server + database)
• Install Galera Cluster and ClusterControl
• Setup MySQL replication between the single instance MySQL (local) to Galera Cluster (remote)
• Sync your application …