From the webpage:
Percona Toolkit is a collection of advanced command-line tools used by Percona support staff to perform a variety of MySQL and system tasks that are too difficult or complex to perform manually, including:
- Verify master and replica data consistency
- Efficiently archive rows
- Find duplicate indexes
- Summarize MySQL servers
- Analyze queries from logs and tcpdump
- Collect vital system information when problems occur
Tools are a vital part of any MySQL deployment, so it’s important to use ones that are reliable and well-designed. Over 2,000 tests and several years of deployment, including some of the Internet’s best-known sites, have proven the reliability of the tools in Percona Toolkit. And the combined experience and expertise of Percona ensures that each tool is well thought-out and designed.
With tools and documentation like this, I am sorely tempted to throw a MySQL installation on my box just for fun. (Or more serious purposes.)