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https://dev.mysql.com/doc/refman/8.0/en/set-transaction.html
transaction_characteristic: { ISOLATION LEVEL level | access_mode } level: { REPEATABLE READ | READ COMMITTED | READ UNCOMMITTED | SERIALIZABLE } access_mode: { READ WRITE | READ ONLY } This statement specifies transaction characteristics. By ...It ...
https://dev.mysql.com/doc/refman/8.0/en/set-variable.html
This makes PERSIST_ONLY suitable for configuring read-only system variables that can be set only at server startup. The Performance Schema variables_info table contains information showing when and by which user each system variable was most ...
https://dev.mysql.com/doc/refman/8.0/en/show-profile.html
Note The SHOW PROFILE and SHOW PROFILES statements are deprecated; expect them to be removed in a future MySQL release. Use the Performance Schema instead; see Section 29.19.1, “Query Profiling Using Performance Schema”. To control profiling, ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-undo-tablespaces.html
To empty an undo tablespace, the undo tablespace must first be marked as inactive using ALTER UNDO TABLESPACE syntax so that the tablespace is no longer used for assigning rollback segments to new transactions. ALTER UNDO TABLESPACE tablespace_name ... Undo tablespaces contain undo logs, which are collections of records containing information about how to undo the latest change by a transaction to a clustered index ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-importing-data.html
You may also wish to do this when performing bulk DELETE or UPDATE operations on NDB Cluster tables. If a data import operation does not complete successfully, for whatever reason, you should be prepared to perform any necessary cleanup including ...
https://dev.mysql.com/doc/refman/8.0/en/show-privileges.html
row *************************** Privilege: Alter Context: Tables Comment: To alter the table *************************** 2. row *************************** Privilege: Alter routine Context: Functions,Procedures Comment: To alter or drop stored ...
https://dev.mysql.com/doc/refman/8.0/en/faqs-replication.html
On the source, issue the following statement to enable the source to begin processing updates again: mysql> UNLOCK TABLES; A.14.5. Thus, when the update of client A makes it to co-source 2, it produces tables that are different from what you have on ... In the following section, we provide answers to questions that are most frequently asked about MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/ldap-pluggable-authentication.html
LDAP pluggable authentication provides these capabilities: External authentication: LDAP authentication enables MySQL Server to accept connections from users defined outside the MySQL grant tables in LDAP directories. The following tables show the ... Note LDAP pluggable authentication is an extension included in MySQL Enterprise Edition, a commercial ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-reserved-words.html
For example, a table column named rank on a MySQL 5.7 source that is replicating to a MySQL 8.0 replica could cause a problem because RANK is a reserved word beginning in MySQL 8.0. Replication can fail in such cases with Error 1064 You have an ...
https://dev.mysql.com/doc/refman/8.0/en/replication-howto-additionalslaves.html
For example, the InnoDB system tablespace, undo tablespace, and redo log might be stored in an alternative location. Alternatively, you can use the ALTER EVENT statement to set individual events to DISABLE or DISABLE ON SLAVE to prevent them from ...