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https://dev.mysql.com/doc/refman/5.7/en/locking-service.html
This is distinct from, for example, locks acquired with the GET_LOCK() function, which have an OBJECT_TYPE of USER LEVEL LOCK. Thus, for a statement such as the following, where service_get_write_locks() is called once per row of the result set, ...
https://dev.mysql.com/doc/refman/5.7/en/replication-mode-change-online-concepts.html
When using GTIDs you can take advantage of auto-positioning and automatic fail-over, as well as use WAIT_FOR_EXECUTED_GTID_SET(), session_track_gtids, and monitor replicated transactions using Performance Schema tables. The ability to configure the ...This section explains these concepts and is essential reading before attempting to modify the replication mode of an online ... To be ...
https://dev.mysql.com/doc/refman/5.7/en/windows-testing.html
If you have set a password for the root account, deleted the anonymous account, or created a new user account, then to connect to the MySQL server you must use the appropriate -u and -p options with the commands shown previously. For more ...(Be ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-checkpoints.html
There is no need to flush the buffer pool in one single batch, which would disrupt processing of user SQL statements during the checkpointing process. It knows that all modifications to the database before the label are present in the disk image of ...It often makes sense to set the total size of the log files as large as the buffer pool or even ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-batch-commands.html
file_name Sometimes you may want your script to display progress information to the user. For this you can insert statements like this: SELECT '<info_to_display>' AS ' '; The statement shown outputs <info_to_display>. You can also invoke mysql with ... The mysql client typically is used interactively, like this: mysql db_name However, it is also possible to put your SQL statements in a file and then tell mysql to read its input from that ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-replication-backups.html
Reset the replica cluster using this statement in the mysql client: mysqlR> RESET SLAVE; You can now start the cluster restoration process on the replica using the ndb_restore command for each backup file in turn. We assume that the replication ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-log-statistics.html
Counters providing information about the state of the cluster are updated at 5-second reporting intervals by the transaction coordinator (TC) and the local query handler (LQH), and written to the cluster log. Because some transactions committed in ... The NDB management client's CLUSTERLOG STATISTICS command can provide a number of useful statistics in its ...
https://dev.mysql.com/doc/refman/5.7/en/identifier-qualifiers.html
For example, this statement creates a table using the unqualified name t1: CREATE TABLE t1 (i INT); Because t1 includes no qualifier to specify a database, the statement creates the table in the default database. The permitted qualifiers for object ...This statement creates a table using the qualified name db1.t1: CREATE TABLE db1.t1 (i INT); Because db1.t1 includes a database qualifier db1, the statement creates t1 in the database named db1, regardless of the default ...
https://dev.mysql.com/doc/refman/5.7/en/full-disk.html
This section describes how MySQL responds to disk-full errors (such as “no space left on device”), and to quota-exceeded errors (such as “write failed” or “user block limit reached”). Other threads might be waiting for the table that ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-replication-group-members.html
For more information about the Member_host value and its impact on the distributed recovery process, see Section 17.2.1.3, “User Credentials”. The performance_schema.replication_group_members table is used for monitoring the status of the ...At ...