### 15.15.1 InnoDB INFORMATION\_SCHEMA Tables about Compression

[15.15.1.1 INNODB\_CMP and INNODB\_CMP\_RESET](innodb-information-schema-innodb_cmp.html)
[15.15.1.2 INNODB\_CMPMEM and INNODB\_CMPMEM\_RESET](innodb-information-schema-innodb_cmpmem.html)
[15.15.1.3 Using the Compression Information Schema Tables](innodb-information-schema-examples-compression-sect.html)

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 There are two pairs of `InnoDB` `INFORMATION_SCHEMA` tables about compression that can provide insight into how well compression is working overall:

* [`INNODB_CMP`](information-schema-innodb-cmp-table.html) and [`INNODB_CMP_RESET`](information-schema-innodb-cmp-table.html) provide information about the number of compression operations and the amount of time spent performing compression.

* [`INNODB_CMPMEM`](information-schema-innodb-cmpmem-table.html) and [`INNODB_CMPMEM_RESET`](information-schema-innodb-cmpmem-table.html) provide information about the way memory is allocated for compression.

