tables contain status information on the operations related to
compressed tables, which are covered in
Chapter 3, Working with
InnoDB Compressed Tables. The compressed
page size is in the column
These two tables have identical contents, but reading from
resets the statistics on compression and uncompression
operations. For example, if you archive the output of
every 60 minutes, you see the statistics for each hourly period.
If you monitor the output of
INNODB_CMP (making sure never to
you see the cumulated statistics since InnoDB was started.
For the table definition, see