Xaprb » Maatkit

Aspersa’s mysql-summary tool

Xaprb — Sat, 10 Jul 2010 19:46:25 +0000

For those of you who miss what Maatkit’s mk-audit tool (now retired) gave you, there’s a pair of tools in Aspersa that more than replaces it. I wrote previously about the summary tool. I don’t think I have mentioned the mysql-summary tool. It has been under development for a while, and at this point it has quite a lot of functionality. You can see a sample of the output on its wiki page.

Is Maatkit notable enough for Wikipedia now?

Xaprb — Fri, 02 Jul 2010 12:45:44 +0000

The Maatkit article on Wikipedia was removed some time ago, after being deemed not notable. I believe this is no longer the case. It’s hard to find a credible book published on MySQL in the last few years that doesn’t mention Maatkit, there’s quite a bit of blogging about it from MySQL experts and prominent community members, and the toolkit is certainly in wide use — it’s important enough that notable companies are supporting its development. It’s available through every major Unix-like operating system’s package repository. On Debian, it’s actually part of the mysql-client package, so if you install MySQL, you automatically get Maatkit too. I believe it’s probably the second most important set of MySQL command-line tools; the most important, of course, is the set of client applications that is included with MySQL itself.

But my opinion on this topic is beside the point. I’m the creator, and I’m biased. The Maatkit Wikipedia article should be created by independent people, not the project’s founder. If you think that Maatkit belongs on Wikipedia, I encourage you to help write that article.

The little-known Maatkit man page

Xaprb — Sat, 19 Jun 2010 12:58:38 +0000

The Maatkit toolkit for MySQL has a lot of functionality that’s common across the tools. It’s not a good idea to document this in each tool’s man page, of course. So there is an overall maatkit man page. It explains concepts such as configuration file syntax. This and all the other Maatkit man pages are online.

mk-query-digest uses less memory

Xaprb — Thu, 20 May 2010 02:29:56 +0000

Daniel changed mk-query-digest to use much less memory. It parsed and aggregated a 2GB MySQL slow query log file in a few dozen megabytes of memory for me yesterday. Thanks to Facebook for sponsoring this work. Related posts:mk-query-digest now supports Postgres logsLearn about mk-query-digest at PgEast 2010Slides from my session on mk-query-digest at PgEast 2010mk-query-digest [...] Related posts:

Apsersa’s summary tool supports Adaptec and MegaRAID controllers

Xaprb — Sun, 16 May 2010 18:51:17 +0000

I spent a little time yesterday doing some things with the “summary” tool from Aspersa. I added support for summarizing status and configuration of Adaptec and LSI MegaRAID controllers. I also figured out how to write a test suite for Bash scripts, so most major parts of the tool are fully tested now. I learned a lot more sed and awk this weekend.

There is really only one way to get status of Adaptec controllers (/usr/StorMan/arcconf), but the LSI controllers can be queried through multiple tools. I added support for MegaCli64, as long as it’s located in the usual place at /opt/MegaRAID/MegaCli/MegaCli64. I am looking for feedback and/or help on supporting other methods of getting status from the LSI controllers, such as megarc and omreport. If you can contribute sample output from these tools, please attach them as a file to a new issue report on the project’s issue tracker. (Don’t paste them as text, please — formatting and whitespace will get mangled. Tabs and spaces need to be preserved.)

I am slowly gaining insight into how best to write a similar summary tool for MySQL servers. The goals of this tool are very specific — including things like diff’able output. I’m figuring out what went wrong with Maatkit’s mk-audit tool and how to go about it differently.