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https://dev.mysql.com/doc/refman/8.4/en/innodb-compression-background.html
An InnoDB table created with ROW_FORMAT=COMPRESSED can use a smaller page size on disk than the configured innodb_page_size value. The compressed page size is specified through the CREATE TABLE or ALTER TABLE KEY_BLOCK_SIZE parameter. Specify a ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-truncate-table-reclaim-space.html
For a table to be stored in its own .ibd file, innodb_file_per_table must enabled when the table is created. When a table is truncated, it is dropped and re-created in a new .ibd file, and the freed space is returned to the operating system. This is ... To reclaim operating system disk space when truncating an InnoDB table, the table must be stored in its own .ibd ...
https://dev.mysql.com/doc/refman/8.4/en/linux-installation-native.html
To start the MySQL server use systemctl: $> systemctl start mysqld The database tables are automatically created for you, if they do not already exist. During installation, the initial database is created, and you are prompted for the MySQL root ...
https://dev.mysql.com/doc/refman/8.4/en/merge-table-problems.html
The following are known problems with MERGE tables: MERGE child tables are locked through the parent table. If the parent is a temporary table, it is not locked, and thus the child tables are also not locked; this means that parallel use of the ...
https://dev.mysql.com/doc/refman/8.4/en/myisam-storage-engine.html
To specify explicitly that you want a MyISAM table, indicate that with an ENGINE table option: CREATE TABLE t (i INT) ENGINE = MYISAM; In MySQL 8.4, it is normally necessary to use ENGINE to specify the MyISAM storage engine because InnoDB is the ...
https://dev.mysql.com/doc/refman/8.4/en/myisampack.html
(myisampack creates an intermediate file named tbl_name.TMD in the database directory while it compresses the table. --tmpdir=dir_name, -T dir_name Command-Line Format --tmpdir=dir_name Type Directory name Use the named directory as the location ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-ndb-api-statistics.html
This reflects the creation of the hidden primary key that is a feature of all tables using the NDB storage engine. A number of types of statistical counters relating to actions performed by or affecting Ndb objects are available. Such actions ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-online-add-node-remarks.html
However, all data and indexes added to tables created after a new node group has been added are distributed automatically among all cluster data nodes, including those added as part of the new node group. Normal DML operations using NDB Cluster data ... This section provides general information about the behavior of and current limitations in adding NDB Cluster nodes ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-programs-ndb-blob-tool.html
This tool can be used to check for and remove orphaned BLOB column parts from NDB tables, as well as to generate a file listing any orphaned parts. It is sometimes useful in diagnosing and repairing corrupted or damaged NDB tables containing BLOB ...
https://dev.mysql.com/doc/refman/8.4/en/mysqldump-copying-to-other-server.html
On Server 2: $> mysql < dump.sql Use of --databases with the mysqldump command line causes the dump file to include CREATE DATABASE and USE statements that create the database if it does exist and make it the default database for the reloaded data.