Oprofile is a profiling tool that requires no instrumentation and can profile an entire system. Binaries with symbol tables (-g compiled binaries) and an uncompressed Kernel with symbol table are helpful.

Oprofile is capable of monitoring and analyzing a running -g compiled mysqld and can tell you which functions are using the most CPU time.

Sample output:
CODE:CPU: CPU with timer interrupt, speed 0 MHz (estimated)
Profiling through timer interrupt
samples  %        image name               symbol name
…

At our days there is a lot of books on different languages, technologies, databases and etc, and sometimes it is a difficult to make a good choice. As for me I don’t like books with humor, curious cases with author’s pets and other flood. I don’t like and I do not want to spend my time for reading such things. Also I do not want to spend time for incompetent authors. So from all MySQL books I have ever seen I think only two are really good enough: official documentation ? MySQL 5.0 Certification Study Guide. And no matter your MySQL experience you’ll find a lot of new and usefull things.

When you are connecting to MySQL with native mysql command-line tool you can specify in parameters login and password.

But mysql.exe -u root -p password

Will not work for as expected - it will ask you password once again. Really there should not be spaces between -p option and it’s value. The correct usage is:

mysql.exe -u root -ppassword

I can not see reasons for such behavior, really, but it works in such way and we can do nothing with it.



The other thing I’ve thought about is to make mysql command-line client to interact with MySQL-server through the proxy-server. And why not? Sometimes we are behind the usual proxy and can not connect to MySQL. The other side of the proxy is that we could connect to MySQL from anonymous location

This article shows how to find duplicated rows in a database table. This is a very common beginner question. The basic technique is straightforward. I'll also show some variations, such as how to find "duplicates in two columns" (a recent question on the #mysql IRC channel).

MySQL AB today announced that the Swedish branch of International Data Group (IDG), the world?s largest publisher of IT-related information, is migrating all its online news services to a new content management system built upon the MySQL open source database. The group?s two main Web sites -- IDG.se and ComputerSweden.idg.se -- have already completed migration, with the remaining Swedish IDG properties lined up to follow.

I get emails and calls all the time from salespeople (usually from my company's competitors) looking for a job. They're watching the ground drop out from under them as open source infilitrates their accounts and starts nudging them out. Salespeople go where the money is, so they're calling me (and my colleagues at MySQL, Red Hat, SugarCRM, JasperSoft, etc.).

One call last Thursday was particularly funny. He was perplexed by how we make money, given how low our prices are.

"How do you stay in business without more direct salespeople like me?" he asked.

My response?

Specifically because we don't have more expensive sales people like him. :-)

Verbal one-upmanship aside, these conversations tend to confirm my belief that the proprietary world still doesn't grok just what deep potty it's in. (I have four kids, so I can say the word "potty" without …

Choose any font you like

Ex-web.de Colleague Markus asked me: QUOTE:Because ... we are now changing dedicated server providers, I have already updated the Gentoo base system. Since as we are already changing everything, we might as well now migrate from MySQL 4 to 5.

So my question is: Shall I be switching from latin1 to utf8? Or should I be staying with latin1? I have been writing a german language article on character sets in MySQL and this is the translation of it.

Continue reading "Handling character sets"

We open sourcerors are fond of poking fun of Microsoft. Blue Screen of Death, bugs galore, etc. I guess the biggest software company on the planet is ripe for abuse.

But in an interesting post from TechWeb, it appears that some within the open source community actually think there might be something to be learned from the Great Satan.

Mozilla developers who spent several days this week with the Windows Vista team at Microsoft's Redmond, Wash. campus said that they're considering implementing a security feature in the upcoming OS to better protect future versions of Firefox from attack.

Vladimir Vukievi, who was one of the Mozilla team to take up Microsoft's August offer of Vista assistance, said that Vista's "Low Integrity Mode" might make Firefox less susceptible to exploits....

"We spent a while talking to members of both the …

It is really noticable that the summer is over now. While it was quite silent during the past few months, the last quarter of the year will be packed with conferences and events again.

And we will contribute our share to it, too: in addition to sending speakers to various upcoming events, MySQL will also host two European MySQL User conferences next week. The MySQL Northern Europe Customer Conference will take place in London (UK), on Tuesday, October 17th 2006. Two days later, the MySQL Central Europe Customer Conference will be held in Munich (Germany) on Thursday, October 19th 2006. Both are one-day events, with two tracks of talks in parallel. The sessions will be held by both MySQL employees as well as customers, talking about their experiences in using MySQL …

It is really noticable that the summer is over now. While it was quite silent during the past few months, the last quarter of the year will be packed with conferences and events again.

And we will contribute our share to it, too: in addition to sending speakers to various upcoming events, MySQL will also host two European MySQL User conferences next week. The MySQL Northern Europe Customer Conference will take place in London (UK), on Tuesday, October 17th 2006. Two days later, the MySQL Central Europe Customer Conference will be held in Munich (Germany) on Thursday, October 19th 2006. Both are one-day events, with two tracks of talks in parallel. The sessions will be held by both MySQL employees as well as customers, talking about their experiences in using MySQL …