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https://dev.mysql.com/doc/refman/5.7/en/audit-log-elements.html
System variables enable audit log configuration and status variables provide runtime operational information. MySQL Enterprise Audit is based on the audit log plugin and related elements: A server-side plugin named audit_log examines auditable ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-print-backup-file.html
Usage ndb_print_backup_file file_name file_name is the name of a cluster backup file. This can be any of the files (.Data, .ctl, or .log file) found in a cluster backup directory. These files are found in the data node's backup directory under the ...
https://dev.mysql.com/doc/refman/5.7/en/sys-memory-by-thread-by-current-bytes.html
By default, rows are sorted by descending amount of memory used. The memory_by_thread_by_current_bytes and x$memory_by_thread_by_current_bytes views have these columns: thread_id The thread ID. current_count_used The current number of allocated ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-setup-actors-table.html
This table has a maximum size of 100 rows by default. The setup_actors table contains information that determines whether to enable monitoring and historical event logging for new foreground server threads (threads associated with client ...
https://dev.mysql.com/doc/refman/5.7/en/type-conversion.html
If one of the arguments is a TIMESTAMP or DATETIME column and the other argument is a constant, the constant is converted to a timestamp before the comparison is performed. To be safe, always use complete datetime, date, or time strings when doing ... When an operator is used with operands of different types, type conversion occurs to make the operands ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-observability.html
Nonetheless, you might sometimes need to understand what is happening behind the scenes. There is a lot of automation built into the Group Replication plugin. This is where the instrumentation of Group Replication and Performance Schema becomes ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-innodb_cmpmem.html
The INNODB_CMPMEM and INNODB_CMPMEM_RESET tables provide status information about compressed pages that reside in the buffer pool. Please consult Section 14.9, “InnoDB Table and Page Compression” for further information on compressed tables and ...
https://dev.mysql.com/doc/refman/5.7/en/optimizing-innodb-ddl-operations.html
Online DDL support for adding secondary indexes means that you can generally speed up the process of creating and loading a table and associated indexes by creating the table without secondary indexes, then adding secondary indexes after the data is ... Many DDL operations on tables and indexes (CREATE, ALTER, and DROP statements) can be performed ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-accounts-table.html
The accounts table contains a row for each account that has connected to the MySQL server. For each account, the table counts the current and total number of connections. To set the table size explicitly, set the performance_schema_accounts_size ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-hosts-table.html
The hosts table contains a row for each host from which clients have connected to the MySQL server. For each host name, the table counts the current and total number of connections. To set the table size explicitly, set the ...