You are here

mysql

MySQL @ FrOSCon 7 in St. Augustin (Germany)

Taxonomy upgrade extras: 

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: http://www.heinlein-support.de/schulung/mysql-fuer-profis

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.

Monitoring as a Service (MaaS) for MySQL

How to test MySQL Monitoring as Service (MaaS) for free?

To get MaaS for MySQL follow these steps:

Undefined

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.

Undefined

Example 1


CREATE TABLE `order` (
  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY
, name VARCHAR(64) NOT NULL
) ENGINE = InnoDB;

INSERT INTO `order` VALUES
  (NULL, 'Test order 1')
, (NULL, 'Test order 2')
, (NULL, 'Test order 3');


CREATE TABLE pos (
  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY
, order_id INT UNSIGNED NOT NULL
, name VARCHAR(64) NOT NULL
, amount SMALLINT NOT NULL
, price DECIMAL (6,2) NOT NULL
, status TINYINT NULL
) ENGINE = InnoDB;

INSERT INTO pos VALUES
  (null, 1, 'Schrauben', 50, 0.10, 0)
, (null, 1, 'Muttern', 50, 0.10, 0)
Undefined

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

Taxonomy upgrade extras: 

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

Advanced MySQL DBA Workshop

With a partner we are planning and Advanced MySQL DBA workshop. As the name says it should be a workshop. Its planned duration is 2 days. So within 2 days we can cover 4 to 8 topics more deeply. Requirements: VirtualBox, VMware, own Laptop?

Possible exercises during the workshop

  • Set-up a Master-Master replication with 2 Slaves
  • Load balance on master with MySQL Proxy and on Slaves with LVS.
Undefined

How good is MySQL INSERT TRIGGER performance

Abstract: In this article we discuss how big is the performance impact of MySQL TRIGGERs compared to application side logging (with INSERT) into a MySQL table.

MySQL out in the wild

One of our partners recently asked me on what platforms do we usually see MySQL installed out there...

The last 5 years I gave the answer: Typically it is 80% Linux, 10% Windows, 5% Solaris and 5% all others. But this was only the picture of my limited view and I was not sure how objective this was.

This time I really wanted to know it and so I collected the information of about 570 MySQL installations of customers.

The following numbers came out:

German speaking MySQL User Group (DMySQLAG) founded today

Taxonomy upgrade extras: 
Today the German speaking MySQL User Group (DMySQLAG) was officially founded in Berlin. The association advocates:
  • the information of the use, the handling and the experience with MySQL and development in the MySQL Eco-System as well as systems which use MySQL.
  • the exchange of experience between MySQL users about MySQL and other systems.
  • the Advice and Cooperation with Oracle and vendors of other systems.
  • the submission of suggestions of the members to Oracle and vendors of other systems.

Deutschsprachige MySQL Anwender Gruppe gegründet (DMySQLAG)

Taxonomy upgrade extras: 
Heute wurde in Berlin die Deutschsprachige MySQL Anwender Gruppe formal gegründet. Der Verein fördert:
  • die Information über den Einsatz, den Umgang und die Erfahrung mit MySQL und Entwicklungen im MySQL Eco-System sowie Anwendungssysteme welche MySQL nutzen.
  • den Erfahrungsaustausch zwischen den Benutzern über MySQL sowie anderer Systeme.
  • die Beratung und Zusammenarbeit mit Oracle und Herstellern anderer Systeme.
  • die Unterbreitung von Mitgliedervorschlägen an Oracle und Hersteller von anderen Systemen.

When a MySQL table was last touched

In our last customer project we had around 600 Gbyte of data in a MySQL database. Because this database consumed a significant amount of our disk space and backups with the InnoDB backup tool took pretty long we wanted to find out if we could get rid of some of the tables.

This application was growing over the last 10 years and it was not clear if some tables are still in use or not.

But how to find out when a table was touched last? MySQL/InnoDB theoretically could know about but does not report this information.

BLOB's aus der MySQL Datenbank herausklauben

Taxonomy upgrade extras: 

Ein Kunde, welcher mit digitalen Zertifikaten zu tun hat, hatte ein Problem mit einem solchen. Also mussten wir nachforschen, was das Problem war.

Weil das Zertifikat in binärer Form vorliegt, ist es in einem BLOB gespeichert und wir mussten es aus der Datenbank herausklauben um einige Tests damit durchzuführen.

Als erstes kam mir in den Sinn, das Zertifikat mit dem Befehl SELECT INTO OUTFILE zu erhalten. Aber das Verifizierungstool reklamierte und sagte uns, dass das Zertifikat ein falsches Format habe.

Dumping BLOB's from the MySQL database

Taxonomy upgrade extras: 

A customer who is handling digital certificates had a problem with one of those. So we had to investigate.

Because the certificate is in binary form it is stored in a BLOB and we had to extract it from the database to do some verifications.

What first came to my mind was to extract the certificate with the SELECT INTO OUTFILE command. But the verification tool complained and told us that the certificate has a wrong format.

Configuration of MySQL for Shared Hosting

If you ask around about shared hosting setups with MySQL everybody is frightened. In fact it looks like shared hosting is one of the most difficult setups you can get.

The number of users is big, the number of tables huge and the load pattern is completely unpredictable and the queries often very, let us say: non-optimal.

Here one of the DBA wisdoms come into play: Controlling developers is like herding cats.

If you talk to the Shared MySQL Hoster they confirm that this setups are very demanding!

PrimeBase Technologies and FromDual form a Service-Cooperation for MySQL products

From the Cooperation of these two companies arises the biggest independent service provider for MySQL and MariaDB in Europe.

Hamburg, Uster -- February 28, 2011 - The Hamburg based PrimeBase Technologies and the near Zürich located FromDual are forming a Cooperation for MySQL products and services, starting March 1st, 2011.

This Cooperation enables both companies to offer a complete set of services for all MySQL and MariaDB customers.

The customers of both parties now have he possibility to demand a 24x7 support service from their provider.

DOAG Reagionaltreffen in München - 23. März 2011

Wir sind am DOAG Regionaltreffen in München am Mittwoch den 23. März mit unserem Vortrag MySQL Replikation - Scale-Out, Master-Master, Backup (der Vortrag wird in deutscher Sprache gehalten).

doag_left_r64.gif

FromDual releases new version of its MySQL Performance Monitor

FromDual releases its new version v0.5 of its MySQL Performance Monitor working with Zabbix.

What has changed so far in this release:

MySQL Client Error Codes and Messages 2050 - 2099

2000 - 2049
  • Error: 2050 (CR_FETCH_CANCELED)

    Message: Row retrieval was canceled by mysql_stmt_close() call

  • Error: 2051 (CR_NO_DATA)

    Message: Attempt to read column without prior row fetch

Undefined

Pages

Subscribe to RSS - mysql