Ahoi,

There had been already a couple of blogposts about Docker and Galera in the MySQL community. I've got to confess I love both. But on the other hand I don't think this is a good combination at all. Having a look at the blogpost doing galera with docker Im still not confessed. Im going to tell some points why I think so.

I assume Galera is already well know in the MySQL community :)

Docker is not just another technique to virtualize

Docker is more than just being another way to virtualize. And this may be one of the biggest points I miss with the other blogposts.

What is the purpose of Docker?

With Docker you build applicationcontainers. So you have a container just running one application. The overhead of containers compared to hypervisor technologies like KVM, VMWare etc. is much slower. But instead running a full OS in a container, you just run on …

MariaDB 10.0.12 was recently released, and is available for download here:

https://downloads.mariadb.org/mariadb/10.0.12/

This is the third GA release of MariaDB 10.0, and 13th overall release of MariaDB 10.0.

This is primarily a bug-fix release.

Here are the main items of note:

1. Updated Spider storage engine to version 3.2.4.
2. Updated Connect engine.
3. Updated pcre to version 8.35.
4. Exists-to-In optimization is now enabled by default.
5. …

In my previous post I showed you how to setup Percona XtraDB Cluster 5.6 on Docker. This time I will show you how to setup Percona ClusterControl and add the existing Percona XtraDB Cluster 5.6 that we’ve managed to setup from the previous post.

Let us note the following details about our existing containers:

• 172.17.0.2 dockerpxc1
• 172.17.0.3 dockerpxc2
• 172.17.0.4 dockerpxc3
• 172.17.0.5 dockerccui-test

A quick tip for everyone who has followed my previous blog on setting up Percona XtraDB Cluster 5.6 on Docker: I did not …

As promised, here is the belated post covering the MySQL 5.7.2 Milestone Release, released on September 21, 2013. You can find the full list of changes and bug fixes in the 5.7.2 Release Notes. Enjoy!

InnoDB Read-Only Scalability

One of the goals of 5.7 is to improve performance for Read-Only (RO) and Read-Mostly workloads. In 5.7.2 Sunny Bains made several improvements (see below) and we reached 500K QPS performance levels in the OLTP_RO Point-Selects 8-tables benchmark.  See also Dimitri Kravtchuk’s blog post.

Do Not Allocate trx id for Read-Only Transactions ( …

DELIMITER $$                    -- Change the delimiter

DROP PROCEDURE IF EXISTS demo$$ -- Remove if previously exists
CREATE PROCEDURE demo()         -- Create Stored Procedure
BEGIN                           -- Start of definition
    DECLARE my_int INT;         -- Declare variables
    DECLARE my_big_int BIGINT;
    DECLARE my_text TEXT;

    DECLARE my_name VARCHAR(30) -- Declare variables with 
        DEFAULT 'Rookie Dev';   -- default value set

    SET my_int = 20;            -- Set variables to values …

In my previous post about geo-spatial search in MySQL I described (along with other things) how to use geo-distance functions. In this post I will describe the geo-spatial distance functions in more details.

If you need to calculate an exact distance between 2 points on Earth in MySQL (very common for geo-enabled applications) you have at least 3 choices.

• Use stored function and implement haversine formula
• Use UDF (user defined function) for haversine (see below)
• In MySQL 5.6 you can use st_distance …

MySQL Central @ OpenWorld, taking place in San Francisco September 28 - October 2, will feature keynotes, conference sessions, tutorials, hands-on labs, as well as birds-of-a-feather sessions.

The Content catalog listing the MySQL Central @ OpenWorld sessions is available here.

Some of the sessions you will be able to attend include:

Keynotes:

The State of the Dolphin
Join Edward Screven, Oracle’s Chief Corporate Architect, and Tomas Ulin, vice president of MySQL Engineering, for the “State of the Dolphin” keynote address. You’ll learn about Oracle’s MySQL strategy as well as the latest MySQL …

We recently released a new version of Percona Cloud Tools with MySQL monitoring capabilities. Join me June 25 and learn the details about all of the great new features inside Percona Cloud Tools – which is now free in beta. The webinar is titled “Monitoring All (Yes, All!) MySQL Metrics with Percona Cloud Tools” and begins at 10 a.m. Pacific time.

In addition to MySQL metrics, Percona Cloud Tools also monitors OS performance-related stats. The new Percona-agent gathers metrics with fine granularity (up to once per second), so you are able to see any of these metrics updated real-time.

During the webinar I’ll explain how the new Percona-agent works and how to configure it. And I’ll demonstrate the standard dashboard with the most important MySQL …

I recently presented a webinar explaining how you can enjoy the key benefits of NoSQL data stores without giving up all of the great features provided by a mature RDBMS.

In case you weren’t able to attend (or wanted to refresh your memory) then the webinar replay and charts are now available.

There’s often a lot of excitement around NoSQL Data Stores with the promise of simple access patterns, flexible schemas, scalability and High Availability. The downside can come in the form of losing ACID transactions, consistency, flexible queries and data integrity checks. What if you could have the best of both worlds?

This webinar showed how MySQL Cluster provides simultaneous SQL and …

In this blog post we are going to cover a pretty useful piece of functionality introduced since MySQL for Excel 1.2.0.

There could be times when users may want to see exactly what SQL queries are being generated either before they are sent to the server, so corrections can be made if the query does not look as intended, or after they are sent to the server to obtain additional information or for debugging purposes.

Starting with MySQL for Excel 1.2.0, new global options were added to modify the behavior of the moment when SQL queries that affect a MySQL database are shown to the users. The Global Options dialog can be accessed from the Options button located in the Schema Selection panel or the DB Objects Selection one as shown below.

Remember you can install the latest GA or maintenance version using the …