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https://dev.mysql.com/doc/refman/8.4/en/charset-applications.html
Specify character settings at configuration time, if you build MySQL from source. If most or all applications use the same character set, specifying character settings at server startup or configuration time may be most convenient. Applications that ... For applications that store data using the default MySQL character set and collation (utf8mb4, utf8mb4_0900_ai_ci), no special configuration should be ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-tp-thread-group-stats-table.html
This number is incremented when a statement starts executing, not when it finishes. QUERIES_QUEUED The number of statements received that were queued for execution. This does not count statements that the thread group was able to begin executing ...
https://dev.mysql.com/doc/refman/8.4/en/charset-gb18030.html
If an incoming sequence is illegal, an error or warning is returned. If an illegal sequence is used in CONVERT(), an error is returned. The minimum multibyte length is 1 and the maximum is 4. Non-Chinese characters are sorted before Chinese ... In ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning-limitations-storage-engines.html
It is not possible under normal circumstances in NDB Cluster to create an NDB Cluster table using any partitioning type other than [LINEAR] KEY, and attempting to do so fails with an error. The maximum number of partitions that can be defined for an ... In MySQL 8.4, partitioning support is not actually provided by the MySQL Server, but rather by a table storage engine's own or native partitioning ...
https://dev.mysql.com/doc/refman/8.4/en/converting-tables-to-innodb.html
Make sure that any error handlers in your application also ROLLBACK incomplete changes or COMMIT completed changes. Handling Deadlocks You might see warning messages referring to “deadlocks” in the MySQL error log, or the output of SHOW ENGINE ... If you have MyISAM tables that you want to convert to InnoDB for better reliability and scalability, review the following guidelines and tips before ...
https://dev.mysql.com/doc/ndbapi/en/mgm-structures.html
unsigned time: The time at which the log event was registered with the management server. int connect_count: The number of times this node has connected to or disconnected from the management server. int connect_count: The number of times this node ... This section provides information about the data structures defined by the MGM ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-data-drift-detection.html
Over time, the similarity between the training data and the test data can decrease. The second JSON_OBJECT includes the additional_details option set to true, so ml_results includes values for metric and attribution_percent. The LIMIT of 3 means ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-performance-compression-oltp.html
The rise of SSD storage devices, which are fast but relatively small and expensive, makes compression attractive also for OLTP workloads: high-traffic, interactive websites can reduce their storage requirements and their I/O operations per second ...
https://dev.mysql.com/doc/mysql-router/9.4/en/router-read-write-splitting-configuration.html
wait_for_my_writes_timeout [ 0 | 4294967295 ]: Maximum time in seconds to wait for a read_only destination to apply the written transaction, before falling back to a read_write destination. destinations: must be set to a metadata-cache URL with the ... To enable read-write splitting, the following router options must be enabled: access_mode: must be set to ...
https://dev.mysql.com/doc/mysql-ai/9.5/en/mys-ai-aml-data-drift-detection.html
Over time, the similarity between the training data and the test data can decrease. The second JSON_OBJECT includes the additional_details option set to true, so ml_results includes values for metric and attribution_percent. The LIMIT of 3 means ...