The MySQL development team is pleased to announce that Oracle Enterprise Manager for MySQL Database 13.2.2.0.0 has been released.

Oracle Enterprise Manager for MySQL Database is the official MySQL plug-in that provides comprehensive performance, availability, and configuration information for Oracle's integrated enterprise IT management product line, Oracle Enterprise Manager (13c or later).

This is a maintenance release that includes a few enhancements and fixes a number of bugs. You can find more information on the contents of this release in the change log.

Use Self-Update to deploy Oracle Enterprise Manager for MySQL Database 13.2.2.0.0. Or use My Oracle Support to download and install manually. Choose the "Patches & Updates" tab, and then choose the …

MySQL 8.0 RC2 has just been released with a lot of new features compared to MySQL 5.7. In this blog post, I will list the top 10 new features that should excite developers.

These functionalities are presented in descending order of preference of our MySQL Community.

TOP 10

1. MySQL Document Store
2. Default to utf8mb4
3. JSON enhancements
4. CTEs
5. Window Functions
6. Descending Indexes
7. Better Optimizer Cost Model
8. MySQL Server Components
9. Improvement in GIS
10. InnoDB NO WAIT & SKIP LOCKED

MySQL Document Store

This is the most expected and liked feature in MySQL 8.0 … and it’s …

The MariaDB project is pleased to announce the availability of MariaDB 10.2.13, the next stable release in the 10.2 series, as well as MariaDB Connector/ODBC 3.0.3 and MariaDB Connector/ODBC 2.0.16. See the release notes and changelogs for details. Download MariaDB 10.2.13 Release Notes Changelog What is MariaDB 10.2? MariaDB APT and YUM Repository Configuration Generator […]

The post MariaDB 10.2.13, MariaDB Connector/ODBC 3.0.3 and MariaDB Connector/ODBC 2.0.16 now available appeared first on MariaDB.org.

Recently we had a report from a user who had seen a stunning 90% performance regression after upgrading his server to a Linux kernel with KPTI (kernel page-table isolation – a remedy for the Meltdown vulnerability). A big deal of those 90% was caused by running in an old version of VMware which doesn’t pass […]

The post MyISAM and KPTI – Performance Implications From The Meltdown Fix appeared first on MariaDB.org.

Please join Percona’s Principal Support Engineer, Sveta Smirnova, as she presents “Basic Internal Troubleshooting Tools for MySQL Server” on Thursday, February 15, 2018, at 10:00 am PST (UTC-8) / 1:00 pm EST (UTC-5).

Register Now

MySQL Server has many built-in troubleshooting tools. They are always available and can provide many insights on what is happening internally. Many graphical tools, such as Percona Monitoring and Management …

I was involved in one of the development support for MySQL. Here is an interesting case

The application needs a Sequence generator as it was not present inbuilt with MySQL ( MariaDB will have it in 10.3 ) they have made sequence generator function with ‘select for update‘ statement. But it tends to cause more locking at high concurrency with their XtraDB Cluster deployment.

To get rid of this , the sequence generation were made as direct Update queries and sequence is fetched using Select @next.

UPDATE EO_PK_TABLE SET PK = (@next := PK …

Percona Monitoring and Management (PMM) is a free and open-source platform for managing and monitoring MySQL and MongoDB performance. You can run PMM in your own environment for maximum security and reliability. It provides thorough time-based analysis for MySQL and MongoDB servers to ensure that your data works as efficiently as possible.

Starting with version 1.4.0 and improved in 1.7.0, PMM supports external monitoring services. This means you can plug in Prometheus exporters for technologies not directly provided by Percona. For example, you can start monitoring the metrics of your  …

The world is brimming with the ideas of self-driving cars and all sorts of
other concepts where computers are supposed to take care of
decision making.

This makes a bit worried, for one because I simply like to drive and
would not want a computer to interfere with my driving. I am already
quite irritated by many automatic things in cars that don't really work
when winter is upon in Sweden :)

Anyways this post is not about that, this post is more about the general
problem of designing adaptive algorithms.

I've been designing NDB software for more than 20 years. During the
course of these years I have learned a bit about what is optimal
when executing NDB. Most of the software I write today is about
putting this knowledge into the NDB software itself.

This is a trend in databases today to automate configuration handling
…

As promised, the following are links to slides from my talks during MySQL Day and FOSDEM @Brussels in Feb.2018 :

• MySQL Day : 8.0-dev Scalability & Benchmarks
• FOSDEM #18 : 8.0 InnoDB Re-Design

NOTE : for those who did not follow, CATS is not the only change in InnoDB ;-))

Rgds,
-Dimitri

You may already know that MySQL 8.0 is coming with a nice requested feature : ROLES

A role is a named collection of privileges. When you watch some slidedeck about MySQL 8.0 and ROLES, some times you can see a graph illustrating the ROLES and their eventual hierarchy. From the documentation, it seems those graphs are made using the ROLES_GRAPHML() function.

I tried it… and my first try is not really what I was expecting…

Input file

To create the input file I used the following command:

mysql> SELECT ROLES_GRAPHML() into outfile '/var/lib/mysql-files/test_roles.graphml';
Query OK, 1 row affected (0.19 sec)

Then I used yEd to …