InfiniDB worked at IBM in one of their offshoot offices that was principally involved in the creation of hard disk systems. He was miserable with all the navigational model of the InfiniDB strategy, notably the dearth of a “search” facility. In 2016, he composed several papers that summarized a new method of database building that […]

MySQL Fabric provides a simple way to manage a collection of MySQL Servers and ensure that transactions and queries are routed to the correct server. We're pleased to announce that MySQL Fabric is now Generally Available and ready for live deployment! This article explains what MySQL Fabric is and how to set it up. It also gives an example of how it can be used to introduce High Availability (including automated failure detection and transparent failover) and/or scale-out (using data partitioning/sharding).

In complex systems it's often useful to be able to receive notification when rows have been modified in MySQL so that you can invalidate various external caches or indexes. For example: memcached, Sphinx, Lucene.

In the case of MySQL's default statement-based replication this can be quite tricky to do, as it would likely require an SQL parser to determine what was intended to be modified. However, this is made much simpler with Row-based Replication (something I recommend switching to).

A C++ library exists to be able to listen to MySQL replication, but what I want to demonstrate is that it is also very simple to be able to do this with mysqlbinlog:


shell> mysqlbinlog --read-from-remote-server --stop-never --host localhost.localdomain …

Since the first release you were allowed to open a session to directly edit data from a table at Excel on a worksheet and see those changes reflected immediately on the database. You were also capable of opening multiple sessions to different tables at the same time (when they belong to the same schema). The problem was that if for any reason you were forced to close Excel or the Workbook, you had no way to reopen those sessions and continue where you left off.

Today we are going to talk about another feature included since MySQL for Excel 1.2.0 which allows you  to save and restore edit sessions. Remember this product and many others can be downloaded directly from our MySQL Installer downloads page and installed for free.

This guide will help you in compiling and debugging MariaDB (MySQL, Percona) within the Eclipse IDE on Linux and using cmake for source project preparation. It will be split in parts to keep each post lightweight and with a finite objective. At the end of reading this series of blog posts you should be able to:

1. Prepare for compilation any MariaDB (MySQL, Percona) source release based on cmake framework.

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In MySQL, query optimization of single-table UPDATE/DELETE statements is more limited than for SELECT statements. I guess the main reason for this is to limit the optimizer overhead for very simple statements. However, this also means that optimization opportunities are sometimes missed for more complex UPDATE/DELETE statements.

Example

Using the DBT-3 database, the following SQL statement will increase prices by 10% on parts from suppliers in the specified country:

UPDATE part
SET p_retailprice = p_retailprice*1.10
WHERE p_partkey IN
     (SELECT ps_partkey
      FROM partsupp JOIN supplier
      ON ps_suppkey = s_suppkey
      WHERE s_nationkey = 4);

Visual EXPLAIN in MySQL Workbench shows that the optimizer will choose the following …

Recently, I’ve had reason to poke at MySQL performance on some pretty cool hardware. Comparing MySQL 5.6 to MySQL 5.7 is a pretty interesting thing to do when you have many CPU cores.

The improvements to creating read views in InnoDB is absolutely huge for small statements with large concurrency – MySQL 5.7 completely removes this as a bottleneck – as much as doubling maximum SQL queries per second, which is a pretty impressive improvement.

I haven’t poked at the similar improvements in Percona Server on this hardware setup – so I can only really guess as to the performance characteristics of it… If comparing to older MySQL versions, Percona Server 5.5 is likely to outperform MySQL 5.5 thanks to this optimization.

But I have to say… MySQL 5.7 is impressive …

Installing Apache2 With PHP5 And MySQL Support On Ubuntu 14.04LTS (LAMP)

LAMP is short for Linux, Apache, MySQL, PHP. This tutorial shows how you can install an Apache2 webserver on anUbuntu 13.04 server with PHP5 support (mod_php) and MySQL support.

Very welcome to the MySQL High Availability blog. In the last year we have increased the effort on developing high availability solutions for MySQL and there is many new things upcoming. We will report about such things on this blog, including new development of MySQL Replication, MySQL Fabric, and other parts of the MySQL software. Enjoy!

Today while browsing through my emails I was very happy to read this email from Sergei Golubchik :

Hi! I'm happy to announce that MariaDB-10.1 tree has been completely migrated to github. Since now on we'll use github for the new development in MariaDB. It's https://github.com/MariaDB/server, go on, fork it, hack around, submit pull requests. [...]