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https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-waits-history-long-table.html
The Performance Schema autosizes the value of N during server startup. To set the table size explicitly, set the performance_schema_events_waits_history_long_size system variable at server startup. For more information about the relationship between ... The events_waits_history_long table contains N the most recent wait events that have ended globally, across all ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-waits-history-table.html
The Performance Schema autosizes the value of N during server startup. To set the number of rows per thread explicitly, set the performance_schema_events_waits_history_size system variable at server startup. For more information about the ... The ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-performance-timers-table.html
For an explanation of how event timing occurs, see Section 25.4.1, “Performance Schema Event Timing”. Note As of MySQL 5.7.21, the Performance Schema setup_timers table is deprecated and is removed in MySQL 8.0, as is the TICKS row in the ...The ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-prepared-statements-instances-table.html
The Performance Schema provides instrumentation for prepared statements, for which there are two protocols: The binary protocol. SQL Statement Corresponding Server Command PREPARE SQLCOM_PREPARE EXECUTE SQLCOM_EXECUTE DEALLOCATE PREPARE, DROP ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-setup-timers-table.html
For an explanation of how event timing occurs, see Section 25.4.1, “Performance Schema Event Timing”. To avoid unpredictable results after you make timer changes, use TRUNCATE TABLE to reset Performance Schema statistics. The ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-stage-summary-tables.html
The Performance Schema maintains tables for collecting current and recent stage events, and aggregates that information in summary tables. Section 25.12.5, “Performance Schema Stage Event Tables” describes the events on which stage summaries ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-thread-filtering.html
For the Performance Schema to monitor a thread, these things must be true: The thread_instrumentation consumer in the setup_consumers table must be YES. When the Performance Schema checks for a match for each new foreground thread in setup_actors, ... The threads table contains a row for each server ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-transaction-summary-tables.html
The Performance Schema maintains tables for collecting current and recent transaction events, and aggregates that information in summary tables. Section 25.12.7, “Performance Schema Transaction Tables” describes the events on which transaction ...See that discussion for information about the content of transaction events, the current and historical transaction event tables, and how to control transaction event collection, which is disabled by ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-wait-summary-tables.html
The Performance Schema maintains tables for collecting current and recent wait events, and aggregates that information in summary tables. Section 25.12.4, “Performance Schema Wait Event Tables” describes the events on which wait summaries are ...See that discussion for information about the content of wait events, the current and recent wait event tables, and how to control wait event collection, which is disabled by ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-general-table-reference.html
The following table summarizes INFORMATION_SCHEMA general tables. For greater detail, see the individual table descriptions. Table 24.2 INFORMATION_SCHEMA General Tables Table Name Description CHARACTER_SETS Available character sets ...