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https://dev.mysql.com/doc/refman/5.7/en/performance-schema-replication-applier-status-by-worker-table.html
If the replica is not multithreaded, this table shows the status of the applier thread. Otherwise, the replica uses multiple worker threads and a coordinator thread to manage them, and this table shows the status of the worker threads. For a ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-replication-connection-configuration-table.html
This table shows the configuration parameters used by the replica for connecting to the source. Parameters stored in the table can be changed at runtime with the CHANGE MASTER TO statement, as indicated in the column descriptions. It contains ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-startup-configuration.html
To use the MySQL Performance Schema, it must be enabled at server startup to enable event collection to occur. Assuming that the Performance Schema is available, it is enabled by default. To enable or disable it explicitly, start the server with ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-wait-tables.html
The Performance Schema instruments waits, which are events that take time. Within the event hierarchy, wait events nest within stage events, which nest within statement events, which nest within transaction events. These tables store wait events: ...
https://dev.mysql.com/doc/refman/5.7/en/perror.html
For most system errors, MySQL displays, in addition to an internal text message, the system error code in one of the following styles: message ... (Errcode: #) You can find out what the error code means by examining the documentation for your ...
https://dev.mysql.com/doc/refman/5.7/en/pluggable-storage.html
MySQL Server uses a pluggable storage engine architecture that enables storage engines to be loaded into and unloaded from a running MySQL server. Plugging in a Storage Engine Before a storage engine can be used, the storage engine plugin shared ...
https://dev.mysql.com/doc/refman/5.7/en/privilege-changes.html
If the mysqld server is started without the --skip-grant-tables option, it reads all grant table contents into memory during its startup sequence. The in-memory tables become effective for access control at that point. If you modify the grant ...
https://dev.mysql.com/doc/refman/5.7/en/procedure-analyse.html
ANALYSE([max_elements[,max_memory]]) Note PROCEDURE ANALYSE() is deprecated as of MySQL 5.7.18, and is removed in MySQL 8.0. ANALYSE() examines the result from a query and returns an analysis of the results that suggests optimal data types for each ...
https://dev.mysql.com/doc/refman/5.7/en/purge-binary-logs.html
PURGE { BINARY | MASTER } LOGS { TO 'log_name' | BEFORE datetime_expr } The binary log is a set of files that contain information about data modifications made by the MySQL server. The log consists of a set of binary log files, plus an index file ...
https://dev.mysql.com/doc/refman/5.7/en/reloading-sql-format-dumps.html
To reload a dump file written by mysqldump that consists of SQL statements, use it as input to the mysql client.