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https://dev.mysql.com/doc/refman/8.0/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. CREATE TABLE, ALTER TABLE, and DROP TABLE are valid ...Possible destinations for log entries are log files or the general_log and slow_log tables in the mysql system ... MySQL Server provides flexible ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-connection-tables.html
They differ in that, for grant tables, the host part of an account can be a pattern, whereas for Performance Schema tables, the host value is always a specific nonpattern host name. Each connection table has CURRENT_CONNECTIONS and TOTAL_CONNECTIONS ... When a client connects to the MySQL server, it does so under a particular user name and from a particular ...
https://dev.mysql.com/doc/refman/8.0/en/invisible-columns.html
However, even if explicitly referenced, a column that is invisible in the existing table is visible in the new table: mysql> CREATE TABLE t1 (col1 INT, col2 INT INVISIBLE); mysql> CREATE TABLE t2 AS SELECT col1, col2 FROM t1; mysql> SHOW CREATE ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-compression-tuning.html
For example: USE test; SET GLOBAL innodb_file_per_table=1; SET GLOBAL autocommit=0; -- Create an uncompressed table with a million or two rows. \! ls -l data/test/big_table.ibd CREATE TABLE key_block_size_4 LIKE big_table; ALTER TABLE ...However, ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-partitions-table.html
PARTITION_EXPRESSION The expression for the partitioning function used in the CREATE TABLE or ALTER TABLE statement that created the table's current partitioning scheme. For each such row: The SUBPARTITION_NAME, SUBPARTITION_ORDINAL_POSITION, ...
https://dev.mysql.com/doc/refman/8.0/en/faqs-mysql-cluster.html
You must also remember to account for any column indexes as follows: Each primary key or hash index created for an NDBCLUSTER table requires 21−25 bytes per record. Creating NDB Cluster tables with USING HASH for all primary keys and unique ...Can ... In the following section, we answer questions that are frequently asked about MySQL NDB Cluster and the NDB storage ...
https://dev.mysql.com/doc/refman/8.0/en/table-cache.html
When you execute a mysqladmin status command, you should see something like this: Uptime: 426 Running threads: 1 Questions: 11082 Reloads: 1 Open tables: 12 The Open tables value of 12 can be somewhat puzzling if you have fewer than 12 tables. If ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-tables-table.html
Tables assigned to the system tablespace using CREATE TABLE or ALTER TABLE TABLESPACE=innodb_system have a SPACE_TYPE of General. For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-disk-data-objects.html
Create a tablespace; assign the log file group, as well as one or more data files, to the tablespace. Create a Disk Data table that uses this tablespace for data storage. Now we can create a tablespace—an abstract container for files used by Disk ... NDB Cluster Disk Data storage is implemented using the following objects: Tablespace: Acts as containers for other Disk Data ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-tables.html
This is similar to the information available from the SHOW REPLICA STATUS statement, but representation in table form is more accessible and has usability benefits: SHOW REPLICA STATUS output is useful for visual inspection, but not so much for ...