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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 ...
https://dev.mysql.com/doc/refman/8.0/en/external-locking.html
External locking is the use of file system locking to manage contention for MyISAM database tables by multiple processes. External locking is used in situations where a single process such as the MySQL server cannot be assumed to be the only ...
https://dev.mysql.com/doc/refman/8.0/en/rewriter-query-rewrite-plugin-usage.html
The plugin determines whether to rewrite statements based on its in-memory cache of rewriting rules, which are loaded from the rewrite_rules table in the query_rewrite database. The following example creates a simple rule to match statements that ...
https://dev.mysql.com/doc/refman/8.0/en/time-zone-support.html
This section describes the time zone settings maintained by MySQL, how to load the system tables required for named time support, how to stay current with time zone changes, and how to enable leap-second support. Time Zone Variables Populating the ...Beginning with MySQL 8.0.19, time zone offsets are also supported for inserted datetime values; see Section 13.2.2, “The DATE, DATETIME, and TIMESTAMP Types”, for more ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-tablespaces-table.html
The undo tablespace was either selected by the purge thread implicitly or was made inactive by an ALTER UNDO TABLESPACE ... It is ready to be dropped or made active again by an ALTER UNDO TABLESPACE ... The INNODB_TABLESPACES table provides ...
https://dev.mysql.com/doc/refman/8.0/en/create-table-files.html
File Purpose tbl_name.MYD Data file tbl_name.MYI Index file Chapter 18, Alternative Storage Engines, describes what files each storage engine creates to represent tables. For an InnoDB table created in a file-per-table tablespace or general ...
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. row ...PAGES_USED ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-indexes-table.html
For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”. The INNODB_INDEXES table has these columns: INDEX_ID An identifier for the index. TABLE_ID An identifier representing the table ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-virtual-table.html
The INNODB_VIRTUAL table provides metadata about InnoDB virtual generated columns and columns upon which virtual generated columns are based. A row appears in the INNODB_VIRTUAL table for each column upon which a virtual generated column is based.
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-error-summary-tables.html
The Performance Schema maintains summary tables for aggregating statistical information about server errors (and warnings). Each error summary table has three columns that identify the error: ERROR_NUMBER is the numeric error value. For example, if ...For a list of server errors, see Server Error Message ...