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15.14.1.1 INNODB_CMP and INNODB_CMP_RESET
The INNODB_CMP and
INNODB_CMP_RESET
tables provide status information about operations related to
compressed tables, which are described in
Section 15.9, “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 25.39.5, “The INFORMATION_SCHEMA INNODB_CMP and INNODB_CMP_RESET Tables”.
Document created the 26/06/2006, last modified the 26/10/2018
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