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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-clone-tables.html
Note The Performance Schema tables described here are available as of MySQL 8.0.17. The following sections describe the Performance Schema tables associated with the clone plugin (see Section 7.6.7, “The Clone Plugin”). clone_status: status ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-consumer-configurations.html
The setup_consumers table contains the following hierarchy of values: global_instrumentation thread_instrumentation events_waits_current events_waits_history events_waits_history_long events_stages_current events_stages_history ... The consumer ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-data-lock-waits-table.html
Note Prior to MySQL 8.0.1, information similar to that in the Performance Schema data_lock_waits table is available in the INFORMATION_SCHEMA.INNODB_LOCK_WAITS table, which provides information about each blocked InnoDB transaction, indicating the ... The data_lock_waits table implements a many-to-many relationship showing which data lock requests in the data_locks table are blocked by which held data locks in the data_locks ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-data-locks-table.html
Note Prior to MySQL 8.0.1, information similar to that in the Performance Schema data_locks table is available in the INFORMATION_SCHEMA.INNODB_LOCKS table, which provides information about each lock that an InnoDB transaction has requested but not ...For information about which lock requests are blocked by which held locks, see Section 29.12.13.2, “The data_lock_waits ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-error-log-table.html
Of the logs the MySQL server maintains, one is the error log to which it writes diagnostic messages (see Section 7.4.2, “The Error Log”). Typically, the server writes diagnostics to a file on the server host or to a system log service. As of ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-firewall-tables.html
Note The Performance Schema tables described here are available as of MySQL 8.0.23. Prior to MySQL 8.0.23, use the corresponding INFORMATION_SCHEMA tables instead; see MySQL Enterprise Firewall Tables. The following sections describe the ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-instance-tables.html
They provide event names and explanatory notes or status information: cond_instances: Condition synchronization object instances file_instances: File instances mutex_instances: Mutex synchronization object instances rwlock_instances: Lock ...There ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-memory-summary-tables.html
Here is an example of estimate computation; but note that estimate implementation is subject to change: Thread 1 uses memory in the range from 1MB to 2MB during execution, as reported by the LOW_NUMBER_OF_BYTES_USED and HIGH_NUMBER_OF_BYTES_USED ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-pre-filtering.html
Exceptions to this truncation behavior are noted in individual summary table sections. Pre-filtering is done by the Performance Schema and has a global effect that applies to all users. Pre-filtering can be applied to either the producer or ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-setup-instruments-table.html
For example: SQL> UPDATE PERFORMANCE_SCHEMA.SETUP_INTRUMENTS SET FLAGS="controlled" WHERE NAME='memory/sql/NET::buff'; Note Attempting to set FLAGS = controlled on non-memory instruments, or on global memory instruments, fails silently. The ...