22.214.171.124 INNODB_CMP and INNODB_CMP_RESET
INNODB_CMP_RESET tables provide status information about operations related to compressed tables, which are described in Section 14.9, “InnoDB Table and Page Compression”. The
PAGE_SIZE column reports the compressed page size.
These two tables have identical contents, but reading from
INNODB_CMP_RESET resets the statistics on compression and uncompression operations. For example, if you archive the output of
INNODB_CMP_RESET every 60 minutes, you see the statistics for each hourly period. If you monitor the output of
INNODB_CMP (making sure never to read
INNODB_CMP_RESET), you see the cumulative statistics since InnoDB was started.
For the table definition, see Section 24.32.4, “The INFORMATION_SCHEMA INNODB_CMP and INNODB_CMP_RESET Tables”.