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https://dev.mysql.com/doc/refman/5.7/en/replication-threads-monitor-worker.html
Waited due to worker queue full The number of times that the coordinator thread had to wait to schedule an event because an applier worker thread's queue was full. On a multithreaded replica, the Performance Schema tables ...
https://dev.mysql.com/doc/refman/5.7/en/security-guidelines.html
In discussing security, it is necessary to consider fully protecting the entire server host (not just the MySQL server) against all types of applicable attacks: eavesdropping, altering, playback, and denial of service. If you are able to connect ...
https://dev.mysql.com/doc/refman/5.7/en/sha256-pluggable-authentication.html
For clients that use the sha256_password plugin, passwords are never exposed as cleartext when connecting to the server. The password is sent as cleartext but cannot be snooped because the connection is secure. If a secure connection is not used and ... MySQL provides two authentication plugins that implement SHA-256 hashing for user account passwords: sha256_password: Implements basic SHA-256 ...
https://dev.mysql.com/doc/refman/5.7/en/show-tables.html
SHOW [FULL] TABLES [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr] SHOW TABLES lists the non-TEMPORARY tables in a given database. The optional FULL modifier causes SHOW TABLES to display a second output column with values of BASE TABLE for a ...You can also get this list using the mysqlshow db_name ...
https://dev.mysql.com/doc/refman/5.7/en/sys-extract-schema-from-file-name.html
It provides a convenient way to display schema names, which can be more easily understood than full path names, and can be used in joins against object schema names. Parameters path VARCHAR(512): The full path to a data file from which to extract ...
https://dev.mysql.com/doc/refman/5.7/en/sys-extract-table-from-file-name.html
It provides a convenient way to display table names, which can be more easily understood than full path names, and can be used in joins against object table names. Parameters path VARCHAR(512): The full path to a data file from which to extract the ... Given a file path name, returns the path component that represents the table ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-object-index.html
The following tables list sys schema objects and provide a short description of each one.
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-prerequisites.html
Before using the sys schema, the prerequisites described in this section must be satisfied. Because the sys schema provides an alternative means of accessing the Performance Schema, the Performance Schema must be enabled for the sys schema to work.
https://dev.mysql.com/doc/refman/5.7/en/sys-statement-performance-analyzer.html
in_views SET ('with_runtimes_in_95th_percentile', 'analysis', 'with_errors_or_warnings', 'with_full_table_scans', 'with_sorting', 'with_temp_tables', 'custom'): Which views to include. +-------------------------------------+ | Next Output | ...
https://dev.mysql.com/doc/refman/5.7/en/using-gdb-on-mysqld.html
This core file can be used to make a backtrace that may help you find out why mysqld died: $> gdb mysqld core gdb> backtrace full gdb> quit See Section B.3.3.3, “What to Do If MySQL Keeps Crashing”. backtrace full # Do this when mysqld crashes ... On most systems you can also start mysqld from gdb to get more information if mysqld ...