We recommend two open source tools to help with the regular tuning and monitoring of your MySQL database: mysqlreport and mysqlsla. Your website is made from many complex systems. Rapid growth, changes to your site, and other systems can change the load on your MySQL database. It is important that your internal staff become familiar with using these tools and implement routine maintenance. An initial review often leads to significant improvements, and will also help you to implement a monitoring solution for your ongoing performance efforts.

read more

Recently I had one customer for consulting and aside from mysql optimization, etc they asked me for cacti installation/setup to monitor their pretty generic LAMP application. I’ve started setting up all this stuff and I’ve never thought it could be so painful… lots of different templates for the same tasks, all of them are incompatible with recent cacti releases, etc, etc… So, this post is generally a list of used templates with a fixes I’ve made to make them work on recent cacti release.

(more…)

Kevin Burton wrote recently about why SHOW SLAVE STATUS is really not a good way to monitor how far behind your slave servers are, and how slave network timeouts can mess up the slave lag. I'd like to chime in and say this is exactly why I thought Jeremy Cole's MySQL Heartbeat script was such a natural fit for the MySQL Toolkit. It measures slave lag in a "show me the money" way: it looks for the effects of up-to-date replication, rather than asking the slave how far behind it thinks it is.

The slave doesn't even need to be running. In …

This release of MySQL Toolkit adds a new tool, fixes some minor bugs, and adds new functionality to several of the tools.

This release is part of the unstable 1.5 branch. Its features will ultimately go into the stable 1.6 branch. You can download it from the innotop-devel package.

The major change is I've ripped out the W (Lock Waits) mode and enabled innotop to discover not only what a transaction is waiting for, but what it holds too. The new mode that replaces W is L (Locks). My last article goes into more detail on this.

This article shows you how to use a little-known InnoDB feature to find out what is holding the lock for which an InnoDB transaction is waiting. I then show you how to use an undocumented feature to make this even easier with innotop.

This release is part of the unstable 1.5 branch. Its features will ultimately go into the stable 1.6 branch. You can download it from the innotop-devel package.

The major change is a new Command Summary' mode (switch to this mode with the 'C' key) that's similar to mytop's 'c' mode. It shows you the relative size of variables from SHOW STATUS and SHOW VARIABLES.

Version 1.5.0 of the innotop MySQL and InnoDB monitor is out. This release is the first in the unstable 1.5.0 branch, which will eventually become the stable 1.6 branch. I'm beginning to merge the various branches I've made to support some of our needs at my employer. This first release adds some major new features and prepares for some other large improvements and new features.

Version 1.4.3 of the innotop MySQL and InnoDB monitor is out. This release fixes some minor bugs and feature annoyances, and at last innotop has thorough documentation, available online!