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https://dev.mysql.com/doc/refman/8.0/en/analyze-table.html
During the analysis, the table is locked with a read lock for InnoDB and MyISAM. This meant that, when there were long running statements or transactions still using the table when ANALYZE TABLE was invoked, any following statements and transactions ...ANALYZE [NO_WRITE_TO_BINLOG | LOCAL] TABLE tbl_name UPDATE HISTOGRAM ON col_name [, col_name] ...
https://dev.mysql.com/doc/refman/8.0/en/concurrent-inserts.html
In addition, for those statements a read lock is placed on the selected-from table such that inserts into that table are blocked. With LOAD DATA, if you specify CONCURRENT with a MyISAM table that satisfies the condition for concurrent inserts (that ...If there are multiple INSERT statements, they are queued and performed in sequence, concurrently with the SELECT ...
https://dev.mysql.com/doc/refman/8.0/en/connection-access.html
Locking state is recorded in the account_locked column, which must have a value of 'N'. Account locking can be set or changed with the CREATE USER or ALTER USER statement. When you attempt to connect to a MySQL server, the server accepts or rejects ...
https://dev.mysql.com/doc/refman/8.0/en/create-index.html
CREATE [UNIQUE | FULLTEXT | SPATIAL] INDEX index_name [index_type] ON tbl_name (key_part,...) [index_option] [algorithm_option | lock_option] ... An index_option value can be any of the following: KEY_BLOCK_SIZE [=] value For MyISAM tables, ...This ...
https://dev.mysql.com/doc/refman/8.0/en/create-trigger.html
If you use LOCK TABLES to lock a table that has triggers, the tables used within the trigger are also locked, as described in LOCK TABLES and Triggers. CREATE [DEFINER = user] TRIGGER [IF NOT EXISTS] trigger_name trigger_time trigger_event ON ...
https://dev.mysql.com/doc/refman/8.0/en/disk-issues.html
Striping Striping means that you have many disks and put the first block on the first disk, the second block on the second disk, and the N-th block on the (N MOD number_of_disks) disk, and so on. Potential issues, which vary by operating system and ... This section describes ways to configure storage devices when you can devote more and faster storage hardware to the database ...
https://dev.mysql.com/doc/refman/8.0/en/drop-index.html
algorithm_option: ALGORITHM [=] {DEFAULT | INPLACE | COPY} lock_option: LOCK [=] {DEFAULT | NONE | SHARED | EXCLUSIVE} DROP INDEX drops the index named index_name from the table tbl_name. The table is not locked against access from other NDB Cluster ...This statement is mapped to an ALTER TABLE statement to drop the ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-monitor-types.html
There are two types of InnoDB monitor: The standard InnoDB Monitor displays the following types of information: Work done by the main background thread Semaphore waits Data about the most recent foreign key and deadlock errors Lock waits for ...
https://dev.mysql.com/doc/refman/8.0/en/keywords.html
Certain keywords, such as SELECT, DELETE, or BIGINT, are reserved and require special treatment for use as identifiers such as table and column names. This may also be true for the names of built-in functions. Some keywords which are otherwise ...
https://dev.mysql.com/doc/refman/8.0/en/memory-storage-engine.html
NDB Cluster offers the same features as the MEMORY engine with higher performance levels, and provides additional features not available with MEMORY: Row-level locking and multiple-thread operation for low contention between clients. Performance ...