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https://dev.mysql.com/doc/refman/8.0/en/index-condition-pushdown-optimization.html
(For information about triggered conditions, see Section 10.2.2.3, “Optimizing Subqueries with the EXISTS Strategy”.) (MySQL 8.0.30 and later:) Conditions cannot be pushed down to derived tables containing references to system variables. Index ...
https://dev.mysql.com/doc/refman/8.0/en/index-preloading.html
Without preloading, the blocks are still placed into the key cache as needed by queries. If there are enough blocks in a key cache to hold blocks of an entire index, or at least the blocks corresponding to its nonleaf nodes, it makes sense to ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-cmp-per-index-table.html
The INNODB_CMP_PER_INDEX and INNODB_CMP_PER_INDEX_RESET tables provide status information on operations related to compressed InnoDB tables and indexes, with separate statistics for each combination of database, table, and index, to help you ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-cmp-table.html
The INNODB_CMP and INNODB_CMP_RESET tables provide status information on operations related to compressed InnoDB tables. The INNODB_CMP and INNODB_CMP_RESET tables have these columns: PAGE_SIZE The compressed page size in bytes. COMPRESS_OPS The ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-cmpmem-table.html
The INNODB_CMPMEM and INNODB_CMPMEM_RESET tables provide status information on compressed pages within the InnoDB buffer pool. The INNODB_CMPMEM and INNODB_CMPMEM_RESET tables have these columns: PAGE_SIZE The block size in bytes. PAGES_USED The ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-columns-table.html
For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”. The INNODB_COLUMNS table has these columns: TABLE_ID An identifier representing the table associated with the column; the same ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-datafiles-table.html
The INNODB_DATAFILES table provides data file path information for InnoDB file-per-table and general tablespaces. For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”. Note The ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-fields-table.html
The INNODB_FIELDS table provides metadata about the key columns (fields) of InnoDB indexes. For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”. The INNODB_FIELDS table has these ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-foreign-cols-table.html
The INNODB_FOREIGN_COLS table provides status information about InnoDB foreign key columns. For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”. The INNODB_FOREIGN_COLS table has ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-foreign-table.html
For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”. The INNODB_FOREIGN table has these columns: ID The name (not a numeric value) of the foreign key index, preceded by the schema ...