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https://dev.mysql.com/doc/refman/8.4/en/replication-threads-monitor-worker.html
The message lists the following statistics for the relevant replication channel, or the default replication channel (which is not named): Seconds elapsed The difference in seconds between the current time and the last time this information was ...A ... On a multithreaded replica, the Performance Schema tables replication_applier_status_by_coordinator and replication_applier_status_by_worker show status information for the replica's coordinator thread and applier worker threads ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-events-statements-current-table.html
For discussion of picoseconds as the unit for event times and factors that affect time values, see Section 29.4.1, “Performance Schema Event Timing”. This value is computed in microseconds but normalized to picoseconds for easier comparison with ...For example, the events_statements_history and events_statements_history_long tables are collections of the most recent statement events that have ended, up to a maximum number of rows per thread and globally across all threads, ...
https://dev.mysql.com/doc/heatwave/en/mys-hwgenai-hw-chat.html
Segments for which the distance from the input query exceeds the specified maximum distance threshold are excluded from content retrieval. history_length: specifies the maximum history length, which is the number of question and answers, to include ... The HEATWAVE_CHAT routine automatically calls the ML_RAG routine which loads an LLM and runs a semantic search on the available vector stores by ...
https://dev.mysql.com/doc/mysql-ai/9.4/en/mys-mysqlai-chat.html
Segments for which the distance from the input query exceeds the specified maximum distance threshold are excluded from content retrieval. history_length: specifies the maximum history length, which is the number of question and answers, to include ... The HEATWAVE_CHAT routine automatically calls the ML_RAG routine which loads an LLM and runs a semantic search on the available vector stores by ...
https://dev.mysql.com/doc/internals/en/implementing-the-info-method.html
scan_time - Cost in I/O seeks to perform a full table scan. delete_length - check_time - When calculating values, speed is more important than accuracy, as there is no sense in taking a long time to give the optimizer clues as to what approach may ... The optimizer requests an update of table information by calling the [custom-engine.html#custom-engine-api-reference-info handler::info()] ...
https://dev.mysql.com/doc/ndbapi/en/ndb-nodejs-api-tablemetadata.html
The indexes array of TableMetadata contains one IndexMetadata object per table index. NDB implements a primary key as both an ordered index and a unique index, and might be viewed through the NDB API adapter as two indexes, but through a MySQL ...
https://dev.mysql.com/doc/connector-j/en/connector-j-connp-props-high-availability-and-clustering.html
Default Value 0 Since Version 5.1.6 selfDestructOnPingSecondsLifetime If set to a non-zero value, the driver will close the connection and report failure when 'com.mysql.cj.jdbc.JdbcConnection.ping()' or 'java.sql.Connection.isValid(int)' is called ...Default Value 120 Since Version 5.1.6 initialTimeout If 'autoReconnect' is enabled, the initial time to wait between re-connect attempts (in seconds, defaults to ... autoReconnect Should the driver try to re-establish stale and/or dead connections? If enabled the driver will throw an exception for queries issued ...
https://dev.mysql.com/doc/heatwave/en/heatwave-system-variables.html
rapid_ace_auto_train_max_execution_seconds Introduced 9.4.2 System Variable rapid_ace_auto_train_max_execution_seconds Scope Global Dynamic Yes SET_VAR Hint Applies No Type Integer Default Value 180 Minimum Value 30 Maximum Value 1800 As of MySQL ...
https://dev.mysql.com/doc/internals/en/binary-protocol-value.html
ProtocolBinary::MYSQL_TYPE_STRING, ProtocolBinary::MYSQL_TYPE_VARCHAR, ProtocolBinary::MYSQL_TYPE_VAR_STRING, ProtocolBinary::MYSQL_TYPE_ENUM, ProtocolBinary::MYSQL_TYPE_SET, ProtocolBinary::MYSQL_TYPE_LONG_BLOB, ...
https://dev.mysql.com/doc/internals/en/event-content-writing-conventions.html
Event contents are written using these conventions: Numbers are written in little-endian format (least significant byte first), unless otherwise indicated. Values that represent positions or lengths are given in bytes and should be considered ...