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MySQL und MariaDB Einsteiger Schulung

Sie sind neu im Umfeld der relationalen SQL-Datenbanken und haben die Aufgabe sich mit MySQL oder MariaDB zu befassen? Dieser Kurs vermittelt Ihnen die Grundlagen zu MySQL.


Migration between MySQL/Percona Server and MariaDB

This week, we did some migrations from MariaDB 10.0 to Percona Server 5.6 at the IT department of a big German bank.

We were perfectly aware that since version 10.0 the MariaDB code base started to diverge slightly away from the MySQL and Percona Server code base which are still pretty close to each other.

Because of the Percona Server option enforce_storage_engine we wanted to do this migration.

FromDual Performance Monitor for MySQL 0.9.3 has been released

FromDual has the pleasure to announce the release of the new version 0.9.3 of its popular Database Performance Monitor for MySQL, Galera Cluster, MariaDB and Percona Server fpmmm.

This release contains various minor bug fixes and improvements.

You can download fpmmm from here.

FromDual Performance Monitor for MySQL 0.9.2 has been released

FromDual has the pleasure to announce the release of the new version 0.9.2 of its popular Database Performance Monitor for MySQL, MariaDB and Percona Server mpm.

This release makes mpm compatible with Zabbix v2.2 and contains various minor bug fixes and improvements.

You can download mpm from here.

Verbesserte MySQL Datenbank-Performance mit Virident Flash-Cache

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im letzten Newsletter haben wir Sie über die FromDual Beratungs-Dienstleistungen informiert. Fokus waren die Verfügbarkeit und die Vermeidung von Ausfällen der MySQL Datenbank (Welche Kosten verursacht eine Stunde Ausfallzeit Ihrer MySQL Datenbank?).

MySQL and MariaDB support subscription

Will you be at a loss having a MySQL or MariaDB database problem? Will you need urgently help from experienced FromDual staff when your production MySQL or MariaDB database stops working? Or do you need a third party opinion for one of your MySQL or MariaDB solutions?

FromDual offers you vendor independent database support for MySQL (community and enterprise edition), MariaDB (community and enterprise edition) and Percona Server for all versions starting with 4.0.


Welche Kosten verursacht eine Stunde Ausfallzeit Ihrer MySQL Datenbank?

es gibt Firmen, welche mit ihren MySQL Datenbanken zehntausende von Euros Umsatz pro Stunde erzielen. Andere Firmen betreiben ihr ERP System auf MySQL, an welchem 1000 Arbeitsplätze hängen. Steht die Datenbank still arbeiten 1000 Mitarbeiter nicht mehr, bis das System wieder läuft! Ausfallkosten ab EUR 30'000 pro Stunde aufwärts.


What are the costs of one hour MySQL downtime?


there are companies which earn tens of thousands of Euros per hour with their MySQL databases. Other companies operate their ERP system on MySQL, to which 1000 employees are attached to. Is the database down 1000 people are not working any more until the system is working again! Downtime costs starting at EUR 30'000.- per hour upwards.


MySQL single query performance - the truth!

MySQL single query performance - the truth!

As suggested by morgo I did a little test for the same query and the same data-set mentioned in Impact of column types on MySQL JOIN performance but looking into an other dimension: the time (aka MySQL versions).

The answer

To make it short. As a good consultant the answer must be: "It depends!" :-)

Impact of column types on MySQL JOIN performance

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In our MySQL trainings and consulting engagements we tell our customers always to use the smallest possible data type to get better query performance. Especially for the JOIN columns.

DOAG SIG MySQL - Replication: September 4, 2012 in Hamburg

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On Tuesday, September 4, 2012 the next DOAG SIG MySQL meeting will take place in Hamburg (Germany) with the topic Replication.

Possible presentations are: MySQL Replication, Galera Cluster, Replication with Oracle GoldenGate, Replication with Zimory Scale and Tungsten Replicator.

The event will presumably be located at the Hotel Böttcherhof at Wöhlerstrasse 2.

MySQL @ FrOSCon 7 in St. Augustin (Germany)

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Also this year we will have a special track for MySQL, Galera, Percona und MariaDB at the FrOSCon in St. Augustin in Germany. The conference is scheduled for August 25 and 26 2012.

Together with the PostgreSQL people we are organizing a sub-conference for Open Source RDBMS there. Now we are looking for interesting talks about MySQL and related techniques like Galera, Percona, MariaDB. The only restriction for the talks is: They must be about an Open Source topic.

MySQL Schulung für Profis am 18.-22. Juni in Berlin

Am 18. bis 22. Juni findet an der Heinlein Akademie in Berlin ein fünftägiger hands-on Workshop MySQL für Profis statt. Es hat noch Plätze frei!

Anmeldung und weitere Infos unter:

Troubles with MySQL 5.5 on FreeBSD 9

FreeBSD 9 seems to have some troubles with MySQL 5.5.20. A customer has moved from MySQL 5.0 on Linux to MySQL 5.5 on FreeBSD 9. He experienced a lot of periodic slow downs on the new, much stronger, system which he has not seen on the old Linux box.

This slow downs were also shown in high CPU system time but we could not see any I/O going on.

When we looked into MySQL we have seen many threads in Opening tables state in the MySQL processlist.

Codership partners with FromDual to offer consulting and support services for Galera Cluster for MySQL

Helsinki, Finland, Uster, Switzerland – February 18, 2012 – Codership, the provider of Galera Cluster for MySQL, and FromDual, a MySQL consulting company, today announced collaboration to offer Galera Cluster technology and related support and consulting services for Galera users all over the world, especially in German speaking countries Germany, Austria and Switzerland (DACH). Galera Cluster is a synchronous, true multi-master replication cluster for MySQL using the well known InnoDB storage engine.

Codership und FromDual vereinbaren Zusammenarbeit bei Beratungs- und Support-Dienstleistungen für Galera Cluster auf MySQL

Helsinki, Finnland, Uster, Schweiz – 18. Februar 2012 – Codership, Anbieter des Galera Clusters für MySQL, und FromDual, eine MySQL Beratungsfirma, kündigen eine Zusammenarbeit bei der Verbreitung von Galera Cluster Technologie und dazugehörigen Support- und Beratungs-Dienstleistungen für Galera Anwender an. Galera Cluster ist ein synchroner, echter Multi-Master Replikations-Cluster für MySQL, welcher die weit verbreitete InnoDB Storage Engine nutzt.

MaaS Key Request

Request a Service Key for the Performance Monitor for MySQL

To provide you a correct configuration and to grant you access to our system we need some information from you.

Fields marked with an asterisk (*) are required.


Example 1

CREATE TABLE `order` (
) ENGINE = InnoDB;

  (NULL, 'Test order 1')
, (NULL, 'Test order 2')
, (NULL, 'Test order 3');

, price DECIMAL (6,2) NOT NULL
) ENGINE = InnoDB;

  (null, 1, 'Schrauben', 50, 0.10, 0)
, (null, 1, 'Muttern', 50, 0.10, 0)

MySQL vs. PostgreSQL

Im Admin-Magazin 2011/06 hat es einen netten Artikel über MySQL und PostgreSQL Performance Tuning: Duell der Datenbanken: In einem Shootout messen sich MySQL und PostgreSQL

Susanne hat dabei PostgreSQL, wir MySQL betreut...

MySQL Vala Program Example

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Summary: In this article we have a short look at a simple MySQL example program written in Vala.


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