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https://dev.mysql.com/doc/refman/8.4/en/replication-options-replica.html
On the source and each replica, you must set the server_id system variable to establish a unique replication ID in the range from 1 to 232 − 1. To specify more than one database, use this option multiple times, once for each database; however, ...
https://dev.mysql.com/doc/heatwave/en/mys-hwgenai-ml-embed-table.html
The ML_EMBED_TABLE routine runs multiple embedding generations in a batch, in parallel. Note In versions older than MySQL 9.2.1, to alter an existing table or create a new table, MySQL requires you to set the sql-require-primary-key system variable ...The input column must already exist and must contain text or varchar ...
https://dev.mysql.com/doc/refman/8.4/en/mysqlshow.html
The mysqlshow client can be used to quickly see which databases exist, their tables, or a table's columns or indexes. If no table is given, all matching tables in the database are shown. If no column is given, all matching columns and column types ...The same information can be obtained by using those statements ...
https://dev.mysql.com/doc/refman/8.4/en/optimizing-myisam-bulk-data-loading.html
For a MyISAM table, you can use concurrent inserts to add rows at the same time that SELECT statements are running, if there are no deleted rows in middle of the data file. With some extra work, it is possible to make LOAD DATA run even faster for a ... These performance tips supplement the general guidelines for fast inserts in Section 10.2.5.1, “Optimizing INSERT ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-persistent-stats.html
Optimizer statistics are persisted to disk when innodb_stats_persistent=ON or when individual tables are defined with STATS_PERSISTENT=1. Formerly, optimizer statistics were cleared when restarting the server and after some other types of ... The ...
https://dev.mysql.com/doc/refman/8.4/en/merge-storage-engine.html
The MERGE storage engine, also known as the MRG_MyISAM engine, is a collection of identical MyISAM tables that can be used as one. “Identical” means that all tables have identical column data types and index information. You cannot merge MyISAM ...However, if the user's privileges on t are subsequently revoked, the user can continue to access t by doing so ...
https://dev.mysql.com/doc/refman/8.4/en/sys-table-exists.html
Tests whether a given table exists as a regular table, a TEMPORARY table, or a view. If both a temporary and a permanent table exist with the given name, TEMPORARY is returned. Parameters in_db VARCHAR(64): The name of the database in which to ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-benefits.html
InnoDB tables have the following benefits: If the server unexpectedly exits because of a hardware or software issue, regardless of what was happening in the database at the time, you don't need to do anything special after restarting the database.
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 ...These options cause ndb_blob_tool to check for orphaned BLOB parts, remove any orphaned BLOB parts, and generate a dump file listing orphaned BLOB parts, respectively, and are described in more detail later in this ...
https://dev.mysql.com/doc/workbench/en/wb-develop-object-management-inspector.html
The Schema Inspector and Table Inspector each include the ability to analyze and repair tables, and also view table metrics. It allows you to perform maintenance tasks on tables such as ANALYZE, OPTIMIZE, CHECK, and CHECKSUM TABLE. Figure 8.23 ...