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https://dev.mysql.com/doc/refman/8.0/en/storage-requirements.html
For more information, see Chapter 18, Alternative Storage Engines, and Section 10.4.7, “Limits on Table Column Count and Row Size”. You can increase the size of an NDB blob column's blob part to the maximum of 13948 using NDB_COLUMN in a column ... InnoDB Table Storage Requirements NDB Table Storage Requirements Numeric Type Storage Requirements Date and Time Type Storage Requirements String Type Storage Requirements Spatial Type Storage Requirements JSON Storage Requirements The storage requirements for table data on disk depend on several ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-performance-schema.html
Stage Event tables, which store event data for InnoDB ALTER TABLE and buffer pool load operations. For more information, see Section 17.16.1, “Monitoring ALTER TABLE Progress for InnoDB Tables Using Performance Schema”, and Monitoring Buffer ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-tables-extensions-table.html
The TABLES_EXTENSIONS table (available as of MySQL 8.0.21) provides information about table attributes defined for primary and secondary storage engines. The TABLES_EXTENSIONS table has these columns: TABLE_CATALOG The name of the catalog to which ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-index-cache-table.html
The INNODB_FT_INDEX_CACHE table provides token information about newly inserted rows in a FULLTEXT index. Before querying it, set the value of the innodb_ft_aux_table system variable to the name (including the database name) of the table that ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-metrics-table.html
The INNODB_METRICS table provides information about InnoDB performance and resource-related counters. For example, to enable the log module, metadata_table_handles_opened and metadata_table_handles_closed counters, enter the following line in the ...SET GLOBAL innodb_monitor_disable = [counter-name|module_name|pattern|all]; innodb_monitor_reset: Resets counter values to ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-truncate-table-reclaim-space.html
To reclaim operating system disk space when truncating an InnoDB table, the table must be stored in its own .ibd file. For a table to be stored in its own .ibd file, innodb_file_per_table must enabled when the table is created. Additionally, there ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-system-variable-tables.html
System variable information is available in these Performance Schema tables: global_variables: Global system variables. An application that wants only global values should use this table. An application that wants all system variable values for its ... The MySQL server maintains many system variables that indicate how it is configured (see Section 7.1.8, “Server System ...
https://dev.mysql.com/doc/refman/8.0/en/table-scan-avoidance.html
The output from EXPLAIN shows ALL in the type column when MySQL uses a full table scan to resolve a query. This usually happens under the following conditions: The table is so small that it is faster to perform a table scan than to bother with a ...
https://dev.mysql.com/doc/refman/8.0/en/sys-table-exists.html
Tests whether a given table exists as a regular table, a TEMPORARY table, or a view. If both a temporary and a permanent table exist with the given name, TEMPORARY is returned. Parameters in_db VARCHAR(64): The name of the database in which to ...
https://dev.mysql.com/doc/refman/8.0/en/backup-methods.html
Making a Hot Backup with MySQL Enterprise Backup Customers of MySQL Enterprise Edition can use the MySQL Enterprise Backup product to do physical backups of entire instances or selected databases, tables, or both. (Ideally, the InnoDB tables should ...Backing up the physical database files makes restore much faster than logical techniques such as the mysqldump ...