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https://dev.mysql.com/doc/refman/5.7/en/innodb-purge-configuration.html
The purge lag is presented as the History list length value in the TRANSACTIONS section of SHOW ENGINE INNODB STATUS output. InnoDB does not physically remove a row from the database immediately when you delete it with an SQL statement. A row and ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-row-format.html
Determining the Row Format of a Table To determine the row format of a table, use SHOW TABLE STATUS: mysql> SHOW TABLE STATUS IN test1\G *************************** 1. The row format of a table determines how its rows are physically stored, which ...
https://dev.mysql.com/doc/refman/5.7/en/ipv6-local-connections.html
The following procedure shows how to configure MySQL to permit IPv6 connections by clients that connect to the local server using the ::1 local host address. Invoke the mysql client to connect to the server using the new account: $> mysql -h ::1 -u ...Start the MySQL server with an appropriate bind_address setting to permit it to accept IPv6 ...
https://dev.mysql.com/doc/refman/5.7/en/ipv6-remote-connections.html
The following procedure shows how to configure MySQL to permit IPv6 connections by remote clients. It is similar to the preceding procedure for local clients, but the server and client hosts are distinct and each has its own nonlocal IPv6 address.
https://dev.mysql.com/doc/refman/5.7/en/json.html
| +-----------------------------------------+ Note The previous example does not work as shown if the NO_BACKSLASH_ESCAPES server SQL mode is enabled. The following list shows the precedences of JSON types, from highest precedence to the lowest. The ...
https://dev.mysql.com/doc/refman/5.7/en/keyring-key-types.html
Table 6.23, “General Keyring Key Length Limits” shows the general key-length limits. (The lower limits for keyring_aws are imposed by the AWS KMS interface, not the keyring functions.) Table 6.24, “Keyring Plugin Key Types and Lengths” shows ... MySQL Keyring supports keys of different types (encryption algorithms) and lengths: The available key types depend on which keyring plugin is ...
https://dev.mysql.com/doc/refman/5.7/en/ldml-collation-example.html
Choose a collation ID, as shown in Section 10.14.2, “Choosing a Collation ID”. You can check the variable value as follows, although the path name might be different on your system: mysql> SHOW VARIABLES LIKE 'character_sets_dir'; ... To add a ...
https://dev.mysql.com/doc/refman/5.7/en/libmysqld-example.html
These two example programs should work without any changes on a Linux or FreeBSD system. For other operating systems, minor changes are needed, mostly with file paths. These examples are designed to give enough details for you to understand the ...
https://dev.mysql.com/doc/refman/5.7/en/load-data.html
For example, the preceding output just shown would appear as follows if the escape character is empty. These sequences are shown in the following table (using \ for the escape character). You can use SHOW WARNINGS to get a list of the first ...The ...
https://dev.mysql.com/doc/refman/5.7/en/log-destinations.html
To display the current structure of the log tables, use these statements: SHOW CREATE TABLE mysql.general_log; SHOW CREATE TABLE mysql.slow_log; Log contents are accessible through SQL statements. MySQL Server provides flexible control over the ...