MySQL 5.7.6 brings in a simplification that solves the very first problem that I encountered back in the days when I first started using MySQL 5.0. Namely…

How do I create a new database instance?

I know it sounds like a very basic question. But as it turned out, the answer was not that simple. I tried mysqld --help. Nothing there. And then, after reading the manual and trying out the complex command line (including redirection) based steps a couple of times, I just resorted to employing the mysql-test-run.pl test suite driver to create the initial system tables and data for me.

Obviously this has …

I’ve been working on MySQL since 2008 but I didn’t write any technical blogs until I joined FromDual GmbH and my first blog was published in October 24th 2013! (You can find all my blogs at FromDual here).
I liked writing blogs for many reasons but mainly for the following two:

1. Sharing knowledge and contributing with MySQL community to make the information easier and available for all.
2. Very good reference for myself to do my daily work more efficiently.

Now, I’m eager to blog again so I decided to create my own blog, MySQL Step-by-Step Blog.
The idea of choosing the name “Step-by-Step” is I like to explain all steps needed for doing a task – you may have discovered that …

The MariaDB CONNECT storage engine now offers access to JSON file and allows you to see a external JSON file as a MariaDB table. JSON (JavaScript Object Notation) is a lightweight data-interchange format widely used on the Internet. JSON like XML represents data hierarchically. The mapping from hierarchical data to tabular data needs to be specified.

[...]

I am leaving Oracle. My last day will be tomorrow. Since Oracle blogs are for Oracle employees only I would not be able to post here. I will write new posts to my personal just created blog http://troubleshootingfreak.blogspot.com/

This blog will stay, so you should be able to access older entries. Therefore I would not migrate them. Just don't expect somebody will manage comments. If you have questions about old entries in this blog use this page.

Last years I worked on JSON UDF project. I will stop working on it after I leave to avoid conflict of interest with Oracle, but project will live. I don't know if it will be passive or Oracle will find new developer for it, but versions 0.3.3 and …

Introduction

The MySQL Optimizer sometimes needs a temporary data-store during query processing, for storing intermediate results. Before MySQL 5.7, this need was serviced exclusively using a combination of the HEAP/MEMORY storage engine (for smaller tables) and the MyISAM storage engine (for larger tables). You can find more information on when disk based temporary tables (MyISAM or InnoDB) are used instead of MEMORY tables here.

The …

The MySQL Performance Schema exposes so much data that it’s not trivial to learn, configure, and use. With recently released Percona Agent 1.0.11 you can get query metrics – like min, max, and average query execution time – with a few clicks:

Click “Apply” and about two minutes later you’ll have query metrics from Performance Schema, collected and sent every minute.

Percona Cloud Tools (PCT) and Percona Agent handle all the details. You’ll need MySQL (or Percona Server) 5.6 and Percona Agent 1.0.11 or newer. One caveat at the moment: it …

The MySQL Utilities team is happy to introduce a new MySQL utility named  ‘mysqlbinlogpurge‘, which allows users to easily and safely purge binary logs on a master by determining the binary logs that are obsolete. This utility is included in MySQL Utilities
release-1.6.1 Alpha release along with ‘mysqlslavetrx‘ and ‘mysqlbinlogrotate‘. This utility enables you to purge binary logs by ensuring that any files which are in use or required by any of the slaves in a replication topology are not deleted. This is achieved by
checking which binary logs have been read on each slave. This determines the minimal set of binary log files that …

The MySQL Utilities Team is pleased to announce the general availability (GA) release of MySQL Utilities. This release includes a number of improvements for useabilty, stability, and a few enhancements. A complete list of all improvements can be found in our release notes.

New Enhancements!

This release represents a stable release of the product. Along with several defect patches, we also include the following enhancements.

Improved support for MySQL 5.7 early releases
Improved output for mysqldbcompare
Improved SSL support

How Can I Download MySQL Utilities?

You can download MySQL Utilities 1.5.2 GA from the following link using one of the pre-built installation repositories including a source download.

http://dev.mysql.com/downloads/tools/utilities/

Where is the Documentation?

You …

The MySQL Utilities Team is pleased to announce a new alpha release of MySQL Utilities. This release includes a number of improvements for useability, stability, and a few enhancements. A complete list of all improvements can be found in our release notes.

New Enhancements!

This release represents a stable release of the product. Along with several defect patches, we also include the following enhancements.

Improved support for MySQL 5.7 early releases
Improved output for mysqldbcompare
Improved SSL support

New Utilities!

This release also has three new utilities for you to try out:

mysqlslavetrx – skip transactions on one or more slaves to solve errant transactions and consistency errors – docs
mysqlbinlogpurge – purge old binary logs – docs
mysqlbinlogrotate – rotate the binary logs – docs

How Can I Download MySQL Utilities?

You can …

There’s an interesting post over at Olery‘s blog about a successful migration story from using MySQL/MongoDB to PostgreSQL as the persistence layer for applications that, however, lists a couple of cons of using MySQL that I personally think are no longer valid complaints (or at least not as big as they used to be). I did … Continue reading Ongoing MySQL myths →

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