MySQL 8.0 Release Notes
MySQL 8.0 Source Code Documentation
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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_CMPandINNODB_CMP_RESETprovide information about the number of compression operations and the amount of time spent performing compression.INNODB_CMPMEMandINNODB_CMP_RESETprovide information about the way memory is allocated for compression.