English: The Madrid MySQL Users Group is pleased to announce its next meeting on February 10th 2016 at 7pm at the offices of Tuenti in Gran Via, Madrid.  Morgan Tocker of Oracle will be visiting to give a talk on MySQL 5.7 and JSON as part of a European tour.  This will give you an an […]

Percona Live is moving from London to Amsterdam this year and the event is also expanding to three full days. Percona Live Europe 2015, September 21-23, will be at the Mövenpick Hotel Amsterdam City Centre. The call for speakers and Super Saver registration are now open. Hurry though because the deadline for submitting a speaking proposal is June 21st and Super Saver registration ends July 5th!

This year’s conference will feature one day of tutorials and two days of keynote talks and breakout …

We have been using SHOW ENGINE INNODB MUTEX command for years. It shows us mutex and rw-lock information that could be useful during service troubleshooting in case of performance problems. As Morgan Tocker announced in his blog post the command will be removed from MySQL 5.7 and we have to use performance_schema to get that info.

The documentation of MySQL also says that most of the command output has been removed from 5.6 and that we can find similar info in performance_schema. It doesn’t show any examples of how to use performance_schema or what is the query we need to use from now on. It is also important to mention that 5.6 doesn’t show any warning about the feature being deprecated.

This is a short blog post to show how to configure performance_schema and get the info we need. Hoping it will end …

MySQL is a database that has been bending the SQL standard in ways that make it hard to move off MySQL. What may appear to be a clever technique for vendor lockin (or maybe just oversight of the standard) can be quite annoying in understanding the real meaning of the SQL language.

One such example is MySQL’s interpretation of how GROUP BY works. In MySQL, unlike any other database, you can put arbitrary expressions into your SELECT clause, even if they do not have a formal dependency on the GROUP BY expression. For instance:

SELECT employer, first_name, last_name
FROM employees
GROUP BY employer

This will work in MySQL, but what does it mean? If we only have one resulting record per employer, which one of the employees will be returned? The semantics of the above query is really this …

Now that I have your attention, I’d like to invite you to a critical review of where we’re at in the MySQL vs. MariaDB debate. Around one month ago, I visited Oracle Open World 2014, and I’ve met with Morgan Tocker, the MySQL community manager at Oracle to learn about where MySQL is heading.

Who “is” MySQL

An interesting learning for myself is the fact that according to Morgan, there had been quite a few former MySQL AB employees that stayed with MySQL when Sun acquired the database, and that are still there now (perhaps after a short break), now that Oracle owns Sun and thus MySQL. In fact, right now as we speak, Oracle is pushing hard to get even more people on board of the MySQL team. …

Today’s post features an interview with Morgan Tocker, MySQL community manager at Oracle. Morgan is an old friend of Percona, having worked here as director of MySQL training from 2009 to 2011. He’s also done stints at MySQL, Sun Microsystems and InPowered. You can follow his adventures at his blog, “Master MySQL.”  You can also connect with him face-to-face at the Percona Live MySQL Conference and Expo this April 1-4 in Santa Clara, Calif.  Use the promotional code “SeeMeSpeak” on the registration page and save 10 percent.

…

(This is a cross post from percona.tv – the home of percona material in video form.)

Last month I gave a presentation at the PHP UK Conference on the InnoDB storage engine.  I was a last minute speaker, and I want to thank them for the time-slot and their hospitality at short notice.

The video has been posted online:

The InnoDB Storage Engine for MySQL – Morgan Tocker from PHP UK Conference on Vimeo.

It relates to InnoDB built-in and InnoDB plugin.  I left out Percona Server and XtraDB for simplicity.

If you want to …

I’ll be helping Morgan Tocker deliver the second half of his training course for MySQL Developers/DBAs in New York City in a few days (more Percona training). It was a snap decision at the last minute, but I’m hoping I’ll still get to meet some folks there. If we’ve corresponded over email or blog comments and you would like to get together, ping me in the comments here!

If you’re in the New York City area and you use MySQL, you should consider attending this course, too. Morgan knows his stuff and has written a good curriculum. Attendees give his courses excellent feedback, and the price is very reasonable. Oh, and I’ll be there too, did I mention that? You can pick my …

Yesterday I attended CPOSC 2009. The conference was great. It was very well run, and I liked the sessions. I would definitely attend this conference again, and will recommend that Percona sponsor it next year. I attended the following talks:

• Stop Worrying and Start Monitoring with Nagios (Andrew Libby)
• DRBD, Network Raid, High Availability and General Awesomeness (Brian Gorka)
• MySQL Performance Tuning for non-DBAs (Tom Clark)
• Wonderful Desktop Tricks, and Aesthetics (Seth Jerome)
• Jump Start Django: The Web Framework for Perfectionists with Deadlines (Rob Yates)
• Watching and Manipulating Your Network Traffic (Josiah Ritchie)

And then of course I gave my own talk on Maatkit ( …

Funding for Aptana and Jolicloud. Ingres targets MySQL. Trent Reznor on Open Core (sort of). And more.

Follow 451 CAOS Links live @caostheory on Twitter and Identi.ca
“Tracking the open source news wires, so you don’t have to.”

Funding
# Aptana raised $7.8m in funding from Rembrandt Venture Partners and Accel Partners.

# Jolicloud raised $4.2m in series A funding for a Linux-based Netbook OS.

Not with a bang…
# Sun reported preliminary revenues for Q4 2009 of $2.58bn to $2.68bn, compared to $3.78bn a year ago.

Best of the rest
# Ingres …