MySQL : What type of metrics can be correlated with the Query Analyzer?

Any graph you see, anything we collect – that could be anything from operating system metrics, such as CPU usage, memory usage, I/O counters, to MySQL-specific counters. You can look at the query profiles over time, i.e. how many selects and updates and other classes of queries were running at any point of time, connections created, threads created, InnoDB row accesses, buffer pool, locks taken over time -- all of these are implemented in this correlation graph feature.