17.17.1 InnoDB Monitor Types

There are two types of InnoDB monitor:

• The standard InnoDB Monitor displays the following types of information:

  • Work done by the main background thread

  • Semaphore waits

  • Data about the most recent foreign key and deadlock errors

  • Lock waits for transactions

  • Table and record locks held by active transactions

  • Pending I/O operations and related statistics

  • Insert buffer and adaptive hash index statistics

  • Redo log data

  • Buffer pool statistics

  • Row operation data

• The InnoDB Lock Monitor prints additional lock information as part of the standard InnoDB Monitor output.