How to find an errant MySQL client
A common story: You’ve got some connection, either it’s busy running something it shouldn’t be, it’s in Sleep but holding some important lock, or you just don’t know why it’s connected to your database...
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Common MySQL Scalability Mistakes
This week I was one of the presenters at the first Surge Scalability Conference in Baltimore. An event that focused not just on one technology but on what essential tools, technologies and practices...
View ArticleDynamic linking costs two cycles
It turns out that the overhead of dynamic linking on Linux amd64 is 2 CPU cycles per cross-module call. I usually take forever to get to the point in my writing, so I thought I would change this for...
View ArticleMySQL 5.5 and transaction management
Announced at MySQL Sunday was the Release Candidate edition of MySQL 5.5.6. Also noted by Geert where he points out the default storage engine is now InnoDB. However, for those from a background other...
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Thank you, everyone behind MySQL AB!
For more than nine years, I worked for MySQL AB and its successors, Sun Microsystems and Oracle. I handed in my resignation late June, two days before Sun’s German legal entity ceased to exist. Germany...
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Friday Tips and Links #10: Grizzly Releases, JAX-RS and WebLogic, GWT, Spring...
Recent Tips and News on Java EE 6 & GlassFish: GlassFish • An Eclipse / GlassFish / Java EE 6 Tutorial • Using JAX-RS with JDeveloper and Weblogic • GlassFish 3 and Oracle 10g XE on Ubuntu Linux...
View ArticleFollowing High Performance MySQL’s hash index discussion
Mixing up some MySQL and SQL Server hacking activities can be fun. I’ve also noticed that when you work with different database platforms, it can bring additional clarity to certain concepts and...
View ArticleDrizzle hint of the day, --help
Over lunch I was talking to a --name removed to protect the innocent-- and they were saying."I spent 30 minutes trying to figure out how to change the port address, and it turned out all I needed to do...
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Innovating with Open Source: Call Center Services
The rise of open source software within both public and private organizations is something well understood, and well documented - industry analysts estimate 80%+ of organizations use open source...
View ArticleHow often should you use OPTIMIZE TABLE? – followup
This post follows up on Baron’s How often should you use OPTIMIZE TABLE?. I had the opportunity of doing some massive purging of data from large tables, and was interested to see the impact of the...
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Sharing an auto_increment value across multiple MySQL tables
The title is SEO bait – you can’t do it. We’ve seen a few recurring patterns trying to achieve similar – and I thought I would share with you my favorite two: Option #1: Use a table to insert into, and...
View ArticleData Dictionary VS Information Schema
By default Drizzle has two schemas in the local catalog.drizzle> SHOW SCHEMAS \G*************************** 1. row ***************************Database: DATA_DICTIONARY*************************** 2....
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How To: Create a Database Diagram Using a Sketch Image
Often we make some sketches of the database we plan to create on a blackboard or a sheet of paper before we actually design its structure on computer. After that we discuss the entities we’ve got,...
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451 CAOS Links 2010.10.05
Microsoft sues Motorola. Oracle says no to LibreOffice. Time to fork Java? And more. Follow 451 CAOS Links live @caostheory on Twitter and Identi.ca, and daily at Paper.li/caostheory “Tracking the open...
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Talks in Moscow, Minsk, Samara
I have my schedule pretty busy during a trip to Russia this year. In addition to giving a master class and Sphinx Conference I’m going to speak at HighLoad++. I’ll also have a user meeting...
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Percona Launches New Support Option for MySQL
We’ve just announced a new support offering for MySQL. There’s a press release here, and product information page here. But what does this new service really mean for you, in practical terms? This is...
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Time to try Drizzle
The Drizzle Beta was announced last week. It took me the better part of an hour to download and install Drizzle, mainly apt-geting packages not on the fresh install of Ubuntu I was using. Be sure to...
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Powered by MariaDB badges
There are more sites out there that have their backends running MariaDB. In fact, as we work to get it recommended alongside its upstream provider, it seemed time to have “Powered by MariaDB” logos....
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Percona at WebConf Riga 2010
My colleague Aleksandr Kuzminsky will be speaking at WebConf Riga 2010 next month on XtraBackup: Hot Backups and More and Recovery of Lost or Corrupted InnoDB Tables. WebConf is the first big...
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MERGE table gotcha with PRIMARY KEY
I know that MERGE isn’t everyone’s favourite storage engine but we use them quite extensively and ran into a problem the other day that I thought I’d share. A common usage pattern is to CREATE...
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