I was curious about Google Fusion Tables, and gave it a try.
I uploaded the employees table from the employees test database, 16 MB of data, about 300,000 rows. Since the maximum limit per table is 100 MB, I expected interesting results.
However, one of my first tests, with aggregation was quite disappointing.
A simple group by gender was executed in about 30 seconds.

InnoDB on my laptop did a much better job:

select gender , count(*) from employees group by gender;
+--------+----------+
| gender | count(*) |
+--------+----------+
| M      |   179973 | 
| F      |   120051 |  …

About six months ago, the question of storing images in a database came up. This is one of my favorite topics, and has many database-agnostic parts.

Personally, I think “tell me about storing images in a database” is actually a great interview question, because you will be able to see the difference between someone who has just memorized “what’s right” versus someone who is really thinking. It also helps you see how someone will communicate — if they just say “NEVER do it, it’s as bad as crossing the streams!” then they are a type of person that gives you a short answer, without much explanation, and without many nuances. (That may be what you are looking for, but usually you want someone who gives reasons for why they strongly feel one way or another).

Consider the following cases:

What about storing …

For the fourth time in a row, I will be speaking at FrOSCon, one of the most charming open source events in Europe.
Hosted in the bright environment of the Department of Computer Science of the University of Applied Sciences Bonn-Rhein-Sieg, this event will get you hooked from the beginning. The organization is done by volunteers, who have always done an amazing job, with even better results than more expensive and famous conferences.
This year, there will be some more action than ever before. In addition to the main event, the organizers have given away a few developers rooms, to let some projects build their own event within the main one. There will be a Java subconference, and, closer to my interests, the European edition of the OpenSQLCamp 2009, which applies to all open …

In large vBulletin forum we had strange problem in memory table "session", we've 25M post, 1.7M user, 20K online user.So we change engine of session table to InnoDB and set configuration of innoDB as follow (be careful this configuration is not proper for other tables because this is good in performance but bad in crash and recovery, and data reliability)innodb_data_home_dir = /dev/shm/mysql/

This is a presentation I gave at the Cloud Expo Europe in London on the 21st of May 2009.

I speak about: Caching the results of processed data - data that had business logic applied to it - to the database to be re-used later.

Caching Business Logic in the Database

The spirit and intent of the Free Software Foundation (FSF) and the GPL license are right on target. However, we must be careful to ensure that the GPL license is interpreted in a manner fulfills the spirit and intent behind its framing. Richard Stallman and associates set out to draft a license agreement that ensures that free software remains free. They didn’t want to see open source become corrupted with the insertion of proprietary code that would eat away at the freedoms they envisioned.

To protect the eternal purity of the open source software, they created constraints on how proprietary code can interact with the GPL code. Their one weapon in this battle is the automatic and forced expansion of their GPL license to any code that integrates with the base GPLed code. I often refer to this process as acting like a virus. I don’t use this term to infer nefarious intent any more than viral marketing infers nefarious intent. On the …

Yesterday, The Pythian Group issued a press release about my book, Pythian’s partnership with Sun, and our new “MySQL Adoption Accelerator Package”. I am not a marketing guru, but I can tell you what we the package means in terms of new work that the MySQL teams have been doing.

Basically, the MySQL Adoption Accelerator Package combines customized training with a comprehensive audit of systems. The name “Adoption Accelerator” makes it sound like it’s only for new applications that are almost ready to go live. What the program actually does is have us evaluate your systems, and intensively train you in the areas you want and need. The program is designed to suit all your needs, whether it’s teaching you about one topic (say, query optimization) or an entire range of topics, from Architecture to ZFS (special issues with running MySQL on ZFS, that is, but that did not fit a cute …

It is not rocket …

One of our colleagues, Dimitri, at the Paris Sun solution center has developed a real neat and useful tool called dim_STAT. To make it short it's a tool for both high-level and detailed, monitoring and performance analysis of Solaris and Linux systems.

Data is collected and saved in a MySQL database, and it provides a very functional web base user interface. It allows real time or off line monitoring, multi-host etc.

Actually what is really interesting with dim_STAT is that, when I'm benchmarking or tryinng to find a performance bottleneck, I can collect all the data I need and come back later for analysis.

Recently, Dimitri has added a new tool db_STRESS, that allows us to put load on a database system and gives a high level metric (TPS: Transactions per seconds) and therefor allows us to compare how different systems compare together.
The point of this post is …

One of our colleagues, Dimitri, at the Paris Sun solution center has developed a real neat and useful tool called dim_STAT. To make it short it's a tool for both high-level and detailed, monitoring and performance analysis of Solaris and Linux systems.

Data is collected and saved in a MySQL database, and it provides a very functional web base user interface. It allows real time or off line monitoring, multi-host etc.

Actually what is really interesting with dim_STAT is that, when I'm benchmarking or tryinng to find a performance bottleneck, I can collect all the data I need and come back later for analysis.

Recently, Dimitri has added a new tool db_STRESS, that allows us to put load on a database system and gives a high level metric (TPS: Transactions per seconds) and therefor allows us to compare how different systems compare together.
The point of this post is …