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https://dev.mysql.com/doc/refman/5.7/en/pattern-matching.html
When you test for a match for this type of pattern, use the REGEXP and NOT REGEXP operators (or RLIKE and NOT RLIKE, which are synonyms). (This differs from a LIKE pattern match, which succeeds only if the pattern matches the entire value.) To ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-accounts-table.html
For a description of how the Performance Schema maintains rows in this table, including the effect of TRUNCATE TABLE, see Section 25.12.8, “Performance Schema Connection Tables”. This is NULL for an internal thread, or for a user session that ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-stages-current-table.html
END_EVENT_ID This column is set to NULL when the event starts and updated to the thread current event number when the event ends. This enables you to check the source to determine exactly what code is involved. NESTING_EVENT_ID The EVENT_ID value of ...The table stores one row per thread showing the current status of the thread's most recent monitored stage event, so there is no system variable for configuring the table ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-instrumentation-checking.html
Changes to this code occur often, which also affects the set of instruments. This information is always up to date for your version of MySQL, also includes instrumentation for instrumented plugins you might have installed that are not part of the ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-memory-model.html
Data collected by the Performance Schema for this buffer is lost, and any corresponding “lost instance” counters are incremented. This query shows the information associated with the memory instruments: SELECT * FROM ...Memory used depends on ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-memory-summary-tables.html
When these two threads belong to the same user account, the per-account summary estimates that this account used memory in the range from 11MB to 14MB. The real memory usage for this account could have been in the range from 11.5MB to 13.5MB.
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-replication-applier-status-table.html
This table shows the current general transaction execution status on the replica. The replication_applier_status table has these columns: CHANNEL_NAME The replication channel which this row is displaying. REMAINING_DELAY If the replica is waiting ...The table provides information about general aspects of transaction applier status that are not specific to any thread ...
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. The column descriptions indicate the corresponding CHANGE MASTER TO options from which the column values are taken, and the table given later in this ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-replication-connection-status-table.html
This table shows the current status of the replication I/O thread that handles the replica's connection to the source. The replication_connection_status table has these columns: CHANNEL_NAME The replication channel which this row is displaying. It ...
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. This enables instrumenting and historical event logging to be applied selectively per host, user, or account (user and host combination). This should be a literal name, or '%' to mean “any ...