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https://dev.mysql.com/doc/refman/8.0/en/error-log-priority-based-filtering.html
The log_filter_internal log filter component implements a simple form of log filtering based on error event priority and error code. To affect how log_filter_internal permits or suppresses error, warning, and information events intended for the ...
https://dev.mysql.com/doc/refman/8.0/en/faqs-thread-pool.html
What is the Thread Pool and what problem does it solve? A.15.2. How does the Thread Pool limit and manage concurrent sessions and transactions for optimal performance and throughput? A.15.3. The default thread-handling model in MySQL Server executes ...How is the Thread Pool different from the client side Connection Pool? ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-quick-start.html
The timer columns show when the event started and stopped and how long it took. If an event is still in progress, the TIMER_END and TIMER_WAIT values are NULL. For information about timers and event time collection, see Section 29.4.1, ...For ...
https://dev.mysql.com/doc/refman/8.0/en/enterprise-encryption-installation.html
From MySQL 8.0.30, the functions are provided by a MySQL component component_enterprise_encryption, and installing the component installs all of the functions. The functions from the openssl_udf shared library are deprecated from that release, and ... In releases before MySQL 8.0.30, the functions provided by MySQL Enterprise Encryption are installed by creating them individually, based on the openssl_udf shared ...
https://dev.mysql.com/doc/refman/8.0/en/optimize-overview.html
As you work on database performance, you start by learning the high-level rules and guidelines for the software side, and measuring performance using wall-clock time. This time improves slowly with new disks and is very hard to optimize for a single ... Database performance depends on several factors at the database level, such as tables, queries, and configuration ...In practice, the advanced ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-functions-for-member-actions.html
When this member action is enabled and taken, super read-only mode is disabled on the primary, so that the primary becomes read-write and accepts updates from a replication source server and from clients. The following functions can be used to ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndb-api-statistics.html
Such actions include starting and closing (or aborting) transactions; primary key and unique key operations; table, range, and pruned scans; threads blocked while waiting for the completion of various operations; and data and events sent and ... A ...
https://dev.mysql.com/doc/refman/8.0/en/clone-plugin-monitoring.html
Monitoring Cloning Operations Using Performance Schema Stage Events A cloning operation may take some time to complete, depending on the amount of data and other factors related to data transfer. Enable the stage/innodb/clone% instruments: mysql> ...
https://dev.mysql.com/doc/refman/8.0/en/x-plugin-options-system-variables.html
mysqlx_connect_timeout Command-Line Format --mysqlx-connect-timeout=# System Variable mysqlx_connect_timeout Scope Global Dynamic Yes SET_VAR Hint Applies No Type Integer Default Value 30 Minimum Value 1 Maximum Value 1000000000 Unit seconds The ...
https://dev.mysql.com/doc/refman/8.0/en/memory-storage-engine.html
Performance Characteristics MEMORY performance is constrained by contention resulting from single-thread execution and table lock overhead when processing updates. If a MEMORY table hash index has a high degree of key duplication (many index entries ...NDB Cluster offers the same features as the MEMORY engine with higher performance levels, and provides additional features not available with MEMORY: Row-level locking and multiple-thread operation for low contention between ...