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https://dev.mysql.com/doc/refman/8.0/en/sys-innodb-buffer-stats-by-table.html
These views summarize the information in the INFORMATION_SCHEMA INNODB_BUFFER_PAGE table, grouped by schema and table. Warning Querying views that access the INNODB_BUFFER_PAGE table can affect performance. The innodb_buffer_stats_by_table and ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-compression-background.html
Data compression enables smaller database size, reduced I/O, and improved throughput, at the small cost of increased CPU utilization. An InnoDB table created with ROW_FORMAT=COMPRESSED can use a smaller page size on disk than the configured ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-performance-compression-oltp.html
Traditionally, the InnoDB compression feature was recommended primarily for read-only or read-mostly workloads, such as in a data warehouse configuration. If you are certain that the zlib version is not subject to change, disable ...These ...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. The INNODB_FIELDS table has these columns: INDEX_ID An identifier for the index associated with this key field; the same value as INNODB_INDEXES.INDEX_ID.
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. The INNODB_FOREIGN_COLS table has these columns: ID The foreign key index associated with this index key field; the same value as INNODB_FOREIGN.ID. row ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-foreign-table.html
The INNODB_FOREIGN table has these columns: ID The name (not a numeric value) of the foreign key index, preceded by the schema (database) name (for example, test/products_fk). row *************************** ID: test/fk1 FOR_NAME: test/child ...For ...0 = ON DELETE/UPDATE RESTRICT, 1 = ON DELETE CASCADE, 2 = ON DELETE SET NULL, 4 = ON UPDATE CASCADE, 8 = ON UPDATE SET NULL, 16 = ON DELETE NO ACTION, 32 = ON UPDATE NO ...
https://dev.mysql.com/doc/refman/8.0/en/index-statistics.html
For InnoDB and MyISAM tables, you have some control over collection of table statistics by means of the innodb_stats_method and myisam_stats_method system variables, respectively. The innodb_stats_method system variable has a global value; the ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-innodb_cmp.html
The INNODB_CMP and INNODB_CMP_RESET tables provide status information about operations related to compressed tables, which are described in Section 17.9, “InnoDB Table and Page Compression”. These two tables have identical contents, but reading ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-redo-log-buffer.html
The log buffer is the memory area that holds data to be written to the log files on disk. A large log buffer enables large transactions to run without the need to write redo log data to disk before the transactions commit. The ...The contents of ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-indexes.html
This section covers topics related to InnoDB indexes. ...