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https://dev.mysql.com/doc/refman/5.7/en/innodb-file-format-compatibility-checking.html
Any time the high water mark is updated, the value of innodb_file_format_check is updated as well, so the command SELECT @@innodb_file_format_check; displays the name of the latest file format known to be used by tables in the currently open ib-file ... To prevent possible crashes or data corruptions when InnoDB opens an ib-file set, it checks that it can fully support the file formats in use within the ib-file ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-understanding-innodb-locking.html
When a transaction updates a row in a table, or locks it with SELECT FOR UPDATE, InnoDB establishes a list or queue of locks on that row. Similarly, InnoDB maintains a list of locks on a table for table-level locks. If a second transaction wants to ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-ddl.html
You can access the underlying InnoDB table (which is test.demo_test by default) through standard SQL interfaces. However, there are some restrictions: When querying a table that is also accessed through the memcached interface, remember that ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-dml.html
Benchmarks suggest that the daemon_memcached plugin speeds up DML operations (inserts, updates, and deletes) more than it speeds up queries. Therefore, consider focussing initial development efforts on write-intensive applications that are ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-txn.html
mysql> SELECT * FROM innodb_memcache.cache_policies; +--------------+-------------+-------------+---------------+--------------+ | policy_name | get_policy | set_policy | delete_policy | flush_policy | ... Unlike traditional memcached, the ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-purge-configuration.html
Running a SELECT query after disabling autocommit, and forgetting to issue an explicit COMMIT or ROLLBACK. InnoDB does not physically remove a row from the database immediately when you delete it with an SQL statement. A row and its index records ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-system-tablespace.html
The system tablespace is the storage area for the InnoDB data dictionary, the doublewrite buffer, the change buffer, and undo logs. It may also contain table and index data if tables are created in the system tablespace rather than file-per-table ...
https://dev.mysql.com/doc/refman/5.7/en/ipv6-local-connections.html
mysql> SELECT CURRENT_USER(), @@bind_address; +----------------+----------------+ | CURRENT_USER() | @@bind_address | +----------------+----------------+ | ipv6user@::1 | :: | +----------------+----------------+ . The following procedure shows how ...
https://dev.mysql.com/doc/refman/5.7/en/ipv6-remote-connections.html
mysql> SELECT CURRENT_USER(), @@bind_address; +-----------------------------------+----------------+ | CURRENT_USER() | @@bind_address | +-----------------------------------+----------------+ | remoteipv6user@2001:db8:0:f101::2 | :: | ... The ...
https://dev.mysql.com/doc/refman/5.7/en/ipv6-support.html
For example: mysql> CREATE USER 'bill'@'::1' IDENTIFIED BY 'secret'; mysql> GRANT SELECT ON mydb.* TO 'bill'@'::1'; IPv6 functions enable conversion between string and internal format IPv6 address formats, and checking whether values represent valid ... Support for IPv6 in MySQL includes these capabilities: MySQL Server can accept TCP/IP connections from clients connecting over ...