There are four types of InnoDB monitors:
The standard InnoDB Monitor displays the
following types of information:
Table and record locks held by each active transaction.
Lock waits of a transaction.
Semaphore waits of threads.
Pending file I/O requests.
Buffer pool statistics.
Purge and change buffer merge activity of the main
InnoDB thread.
The InnoDB Lock Monitor prints additional
lock information as part of the standard
InnoDB Monitor output.
The InnoDB Tablespace Monitor prints a list
of file segments in the shared tablespace and validates the
tablespace allocation data structures.
The InnoDB Table Monitor prints the
contents of the InnoDB internal data
dictionary.
The Tablespace Monitor and Table Monitor are deprecated and
will be removed in a future MySQL release. Similar
information for the Table Monitor can be obtained from
InnoDB
INFORMATION_SCHEMA tables. See
Section 21.29, “InnoDB INFORMATION_SCHEMA Tables”.
For additional information about InnoDB
monitors, see:
Mark Leith: InnoDB Table and Tablespace Monitors