I am turning 38 years old today. I am on my way to Belgium for the funeral of my grandmother. My family, Marta and Tomas, are at home.

I am in Bielefeld, on top of the hill. This is our usual stop from Berlin to Belgium: it’s practically in the middle.

I am sitting at the bar, and I have just finished a great project I have been working for a few months: revamp my homepage and blog, once again.

I tried a few things getting away from (the great) Wordpress. I was trying to make my own again, doing it with Django or Flask, I am a Python guy after all. I tried to do something with my OwnCloud setup, with files, but that was so 1990s, writing HTML.

Giving up, I did a search for “generate static website” and I pretty much hit the first link: “Jekyll”. It is written in Ruby, so I am …

Profiling mysqld on windows using visual studio 2012 profiler tool (vsperfcmd)

Recently, when I was doing performance assessment of one  innodb feature 
using sysbench standard tool then I observed performance drop in the feature.

I had some  hands on experience with  codeanalyst (AMD's tool) so I did sampling profiling. 
I attached profiler vsperf to mysqld when sysbench client was doing transaction with some 
concurrent threads and captured the data for 1 minute.
Just for information, there are 2 technique of profiling -1 sampling and instrumentation. 
For instrumentation, I had limitation because a)our  test  framework starts mysqld in instrumentation 
profiler needs to start mysqld  
b) in-between framework does shutdown  for some clean-up of data and 
c) instrumentation profiling requires debug build.

The codeanalyst does not provide very detailed data like 'vsperf' provides. 

Using visual studio IDE, we can profile (sampling or instrumentation). 
In my …

This blog will discuss the testing aspects of the MySQL products, testing we do for different mysql products,  how we qualify the releases, some of the approaches we use, test tools we use.

Some days ago while I’m looking for what are saying about a mysql.com server down I found a twitter bug:

Is not a big deal, to repeat this bug you must follow these steps:

1. Find any term, in this case “mysql.com” then in results looking for a word that have the search term as a part of them (ex dev.mysql.com) and select the a part or entire word:

2. Press Ctrl + C,  some HTML codes appear from nowhere:

3. Do it again and again, you will see an strange twit like this:

I’m using Firefox 8.0  under Ubuntu, but you will …

Firstly I want to say sorry to my blog readers because I didn’t publish much article about facebook app development in 2011. Because I was very busy for my job, life and honestly said I was not an active facebook web developer in 2011. In computer science algorithm and data structure subject we learned “Time space trade off”. That means if you need faster solution you’ve to use more space and vice versa. This is happened in our life also. If you invest some time in a work you definitely have to  leave some time in other works.

Whatever I’m writing this post to inform my friends and blog readers about my activity in 2011

1. I had been doing web application development job (part time) via oDesk for a US client. I worked almost 1 year for him. I used …

Despite my best intentions, I haven't posted on this blog for a while, which is a shame! I've become busy writing on so many other places since I moved into my new role in the Oracle Linux product management team in April. I've learned a lot and I am feeling quite at home here! The team is excellent and very nice to work with — I am slowly getting the "Big Picture".

But even though I've been neglecting this blog, there are a lot of things that are publicly visible and document some of my activites:

I've created two podcasts for the Oracle Linux podcasts:

• OCFS2: Features and Benefits
• …

After long days I’m writing this post. Though my blog is very popular for facebook related tutorials, but this is not anything related to facebook or php. This is about me and beginning of my career.

I think every programmer should learn different languages and work in different platforms. You can ask me why? If you work on PHP backend development for 5 years, you will become an experienced guy and will earn better income.

So why you’ll invest your time for other language and other platform?
Because it will give you a good taste of programming and you’ll enjoy yourself. I’m not telling you to leave PHP development and move to other platform, I’m just telling you to make some extra time from your regular job and work in different platform or technology.

In my student life I learned and worked on the following …

Picture taken from http://www.kopfnote.net/ under the terms of CC-BY-NC-SA

Pro ty co nesledují dění na internetu pozorně, lehká rekapitulace. SOZA z nadpisu a zbytku postu je Slovenský Ochranný Zvaz Autorský, obdoba českého OSA. Poslední dobou se na Slovensku množily případy, kdy se SOZA domáhala výpalného za embedded youtube videa. Pokuta kterou SOZA vyhrožovala činila 99.60 Eur. SOZA nabídla způsob jak se pokutě vyhnout. Stačí si zakoupit licenci za 16.60 Euro do 50 hodin záznamu nebo za 33.20 Euro nad 50 hodin. Taky vás zaujalo, jak přesně to výpalné má SOZA spočítané? Na desítky centů. Aspoň to budí dojem, že ty čísla si někdo nevycucal z prstu, ale že se knim došlo na základě složitých …

It's been a while since my last post on this blog; I definitely need to get back into the habit! One of the reasons for my radio silence was that I switched roles here at Oracle. After having been with the MySQL team for 9 years, I felt it was time for a change. Fortunately I did not have to look far – I'm now a member of the Oracle Linux product management team and I am having a lot of fun there.

However, I realized that while I was an active Linux user on the desktop, quite a lot has happened on the enterprise and data center side of things. Linux has really come a long way and I am glad to be back in this field, drinking from the firehose and learning a lot about recent developments and technologies. For me, this is kind of going "back to my roots", as I have been deeply involved with Linux at SuSE before I joined MySQL in 2002.

Anyway, I'm still alive and you can expect …

On May 17, 2006 – exactly 5 years ago – I started my new job as web developer at MySQL AB.

Since then I closed 3,049 web requests, worked with 9 colleagues in the web team, had 4 direct managers, attended the MySQL User Conference in Santa Clara, CA 4 times (2006-2009, although in 2006 I wasn’t an employee yet, but that was when I got hired, so lets count it) and one all-company meeting in Orlando, FL and went through 2 acquisitions: in 2008 to Sun Microsystems and in 2010 to Oracle.

Time to say thank you to all the great people who I had the pleasure to work with during these 5 years!