Bernhard blogged over at http://ocklin.blogspot.com/2010/02/mysql-cluster-711-is-there.html that MySQL Cluster 7.1.1 Beta has been released. The big feature (from my point of view) is the SQL interface on top of NDB$INFO. This means there is now full infrastructure from the NDB data nodes right out to SQL in the MySQL Server for adding monitoring to any bit of the internals of the data nodes.

Yes, Maatkit’s name was inspired by Ma’at, which has an apostrophe. But there is NO apostrophe in the name of the popular toolkit for MySQL users.

I’m just sayin’.

Related posts:

1. Learn about Maatkit at the MySQL Conference I’m
2. Speaking about Maatkit at CPOSC I’m
3. Making Maatkit more Open Source one step at a time If you

Related posts brought to you by Yet Another Related Posts Plugin.

I’m on the voting committee of the MySQL Conference this year. I was on the same committee in 2008. This year’s submissions are awesome. Much different from previous years, for whatever reason.

Some of the proposals are sales pitches, infomercials, or just generally BS, but there’s a gang of sharp-eyed people on the committee who are digging into who submits the proposals, what their company does, etc. Those sessions are getting shot down with bluntly honest reviews and low votes. I have a pretty good reason to believe those votes will carry a lot of weight. But even if they don’t, there simply aren’t many bad proposals! The overwhelming majority of them are very useful technical proposals from people who really know what they are talking about.

This year I truly agree that this is going to be a “deeply technical” event, as it has been …

I’d like an UNTIL clause, please. I’d use it sort of like LIMIT in MySQL and PostgreSQL, except that it would define when to stop returning looking for rows, instead of defining how many to return. Example:

SELECT * FROM users ORDER BY user_id UNTIL user_id >= 100;

That would select users up to and including user 99. Ideally the clause could accept any boolean predicate, including subqueries. I’ll hold my breath and wait for this wish to come true now.

No related posts.

Related posts brought to you by Yet Another Related Posts Plugin.

Get it Done with MySQL 5&6

Get it Done with MySQL 5&6. By Peter Brawley and Arthur Fuller. Self-published, 2009. Page count: about 615 pages. I asked the authors for a print edition to review, but it is also available as an e-book.

The right word to describe this book falls somewhere between “tome” and “lunker.” You could beat back an unwelcome salesperson with it. You could also beat back any number of stubborn database problems. It’s kind of like a MySQL Manual plus a ton of practical how-to-use-MySQL information.

This is an unusual book in that it is useful for a very broad audience. I’d say you can get a lot out of it if you are a) new to databases b) new to MySQL c) in need of reference material d) looking for practical examples of installing or using MySQL e) trying to …

If you have recently downloaded or checked out a new version of Kontrollbase and find that you need to upgrade the schema from a previous version then you will probably find this post useful. If you don’t know if you need to upgrade then you probably do, so read along for a bit just to [...]

MySQL Enterprise Monitor offers a tool called "Query Analyzer" (QuAn). QuAn sits between any client app and the MySQL server and logs every query and its runtime statistics. A very cool tool for analyzing your SQL. More information is available here.If you identify a query, that needs some improvement, sometimes it is hard to identify the source of that query as well. With hundreds of different PHP scripts for example it is not easy to know, which one issued the query, that you want to modify.A good way to achieve this is adding C-style SQL comments. Let's look at an example: SELECT * FROM mytable …

I’ve released version 1.1.6 of the Better Cacti Templates project. This release includes a bunch of bug fixes (but not all of them!) and two new sets of graphs. One set is for disk I/O on GNU/Linux, and the other is a new set of templates for OpenVZ. I’m looking for feedback on both of those. This release also has a bunch of code-level features: much better test coverage (hooray!), and a refactored ss_get_by_ssh.php that makes it much easier to create new graphs and templates. The SSH-based templates also take advantage of the same caching as the MySQL templates, which makes them a lot more efficient.

There are upgrade instructions on the project wiki for this and all releases. There is also a comprehensive tutorial on …

iostat is one of the most important tools for measuring disk performance, which of course is very relevant for database administrators, whether your chosen database is Postgres, MySQL, Oracle, or anything else that runs on GNU/Linux. Have you ever wondered where statistics like await (average wait for the request to complete) come from? If you look at the disk statistics the Linux kernel makes available through files such as /proc/diskstats, you won’t see await there. How does iostat compute await? For that matter, how does it compute the average queue size, service time, and utilization? This blog post will show you how that’s computed.

First, let’s look at the fields in /proc/diskstats. The order and location varies between kernels, but the following applies to 2.6 kernels. For reads and writes, the file contains the number of …

It may sound like a dramatic number, and that’s because it is. One thing that is enjoyable about working on beta applications is finding new solutions and better methods to improve the user experience. The original method for displaying the recent addition of overview analytics data in the beta version of Kontrollbase was to run [...]