The MySQL Enterprise Monitor continuously monitors MySQL servers and
alerts to potential problems before they impact the system. It helps
eliminating security vulnerabilities, improves replication, optimizes
performance, and more. Its newest feature, Quan (Query Analyzer), helps
identify queries that could be tuned to improve performance. Quan
enables database administrators to do the work that would otherwise
require hours in just minutes, or even seconds, and it provides ongoing
statistical information about the performance of your queries.
MySQL Enterprise Monitor is a commercial offering by Sun
Microsystems, and so was the documentation. To help anyone (even if
they're not customers) get a better and complete understanding of what
exactly MySQL Enterprise Monitor is about and what it can do, we've
decided to make its full documentation publicly available. This has
been done now, and the docs are part of the MySQL Manual now; see: http://dev.mysql.com/doc/refman/5.1/en/mem-introduction.html
The MySQL Enterprise Monitor documentation is also part of of the manuals that cover MySQL 5.0 and 6.0.