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https://dev.mysql.com/doc/refman/8.4/en/group-replication-upgrading-member.html
To upgrade a member of a group: Connect a client to the group member and issue STOP GROUP_REPLICATION. Disable Group Replication from starting up automatically so that you can safely connect to the member after upgrading and configure it without it ... This section explains the steps required for upgrading a member of a ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-processlist-table.html
This is the same value displayed in the Id column of the SHOW PROCESSLIST statement, displayed in the PROCESSLIST_ID column of the Performance Schema threads table, and returned by the CONNECTION_ID() function within the thread. unauthenticated user ... Important INFORMATION_SCHEMA.PROCESSLIST is deprecated and subject to removal in a future MySQL ...
https://dev.mysql.com/doc/refman/8.4/en/log-file-maintenance.html
Execution of log-flushing statements or commands requires connecting to the server using an account that has the RELOAD privilege. (See Section 6.10, “Unix Signal Handling in MySQL”.) Signals enable log flushing to be performed without having to ... As described in Section 7.4, “MySQL Server Logs”, MySQL Server can create several different log files to help you see what activity is taking ...
https://dev.mysql.com/doc/refman/8.4/en/miscellaneous-functions.html
INET_NTOA(expr) Given a numeric IPv4 network address in network byte order, returns the dotted-quad string representation of the address as a string in the connection character set. INET6_NTOA(expr) Given an IPv6 or IPv4 network address represented ...The function return value and type are the same as the return value and type of its argument, but the function result is not checked for the ONLY_FULL_GROUP_BY SQL ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-config-send-buffers.html
This parameter is used in the config.ini file [tcp] section, and denotes the amount of unsent data (in bytes) that must be present in the send buffer before the connection is considered overloaded. When such an overload condition occurs, ... The NDB ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-ndbinfo-error-messages.html
The error_messages table provides information about The error_messages table contains the following columns: error_code Numeric error code error_description Description of error error_status Error status code error_classification Error ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-ndbinfo-processes.html
Only nodes that are connected to the cluster are shown in this table. You can obtain information about nodes that are configured but not connected to the cluster from the nodes and config_nodes tables. For other types of API nodes, it is the name of ... This table contains information about NDB Cluster node processes; each node is represented by the row in the ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-ndbinfo-server-transactions.html
The server_transactions table is subset of the cluster_transactions table, but includes only those transactions in which the current SQL node (MySQL Server) is a participant, while including the relevant connection IDs. (Currently, the MySQL Server ...Together with the block name, this number can be used to look up a given instance in the threadblocks ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-enterprise-audit.html
MySQL Enterprise Audit uses the open MySQL Audit API to enable standard, policy-based monitoring and logging of connection and query activity executed on specific MySQL servers. The log contents include when clients connect and disconnect, and what ... MySQL Enterprise Edition includes MySQL Enterprise Audit, implemented using a server ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-enterprise-thread-pool.html
The default thread-handling model in MySQL Server executes statements using one thread per client connection. As more clients connect to the server and execute statements, overall performance degrades. The plugin implements a thread pool that ...