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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-waiter.html
ndb_waiter repeatedly (each 100 milliseconds) prints out the status of all cluster data nodes until either the cluster reaches a given status or the --timeout limit is exceeded, then exits. SINGLE USER MODE: This is shown for all cluster data nodes ...By default, it waits for the cluster to achieve STARTED status, in which all nodes have started and connected to the ...--connect-retries Command-Line Format ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-online-upgrade-methods.html
For groups operating in single-primary mode, the asynchronous replication connection to the old group must send data to the primary in the new group, for a multi-primary group the asynchronous replication channel can connect to any primary. For ...
https://dev.mysql.com/doc/refman/8.0/en/create-table-select.html
If errors occur while copying data to the table, the table is automatically dropped and not created. The ENGINE option is part of the CREATE TABLE statement, and should not be used following the SELECT; this would result in a syntax error. The data ... You can create one table from another by adding a SELECT statement at the end of the CREATE TABLE statement: CREATE TABLE new_tbl [AS] SELECT * FROM orig_tbl; MySQL creates new columns for all elements in the ...
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/performance-schema-quick-start.html
For example, use these lines in the server my.cnf file: [mysqld] performance_schema=ON When the server starts, it sees performance_schema and attempts to initialize the Performance Schema. Check the server error log for information about what went ... This section briefly introduces the Performance Schema with examples that show how to use ...row *************************** ENGINE: PERFORMANCE_SCHEMA SUPPORT: ...
https://dev.mysql.com/doc/refman/8.0/en/x-plugin-options-system-variables.html
When the variable names a list of multiple values, each value must specify a single non-wildcard IP address (either IPv4 or IPv6) or a host name. If given, it must be specified as a /ns suffix immediately following the address. The host system must ... To control activation of X Plugin, use this option: --mysqlx[=value] Command-Line Format --mysqlx[=value] Type Enumeration Default Value ON Valid Values ONOFFFORCEFORCE_PLUS_PERMANENT This option controls how the server loads X Plugin at ...
https://dev.mysql.com/doc/refman/8.0/en/replication.html
Depending on the configuration, you can replicate all databases, selected databases, or even selected tables within a database. In this environment, all writes and updates must take place on the source server. Data security - because the replica can ... Replication enables data from one MySQL database server (known as a source) to be copied to one or more MySQL database servers (known as ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-distributed-recovery-fault.html
If the remote cloning operation starts but does not complete, the joining member might be left with a partial set of its original data files, or with no user data. In the following situations, Group Replication detects an error in distributed ...
https://dev.mysql.com/doc/refman/8.0/en/table-cache.html
With MyISAM tables, one extra file descriptor is required for the data file for each client that has the table open. The first open of any MyISAM table takes two file descriptors: one for the data file and one for the index file. Each additional use ...(By contrast, the index file descriptor is shared between all sessions.) The table_open_cache and max_connections system variables affect the maximum number of files the server keeps ... When you execute a mysqladmin status command, you ...
https://dev.mysql.com/doc/refman/8.0/en/pluggable-authentication-system-variables.html
authentication_kerberos_service_key_tab Command-Line Format --authentication-kerberos-service-key-tab=file_name Introduced 8.0.26 System Variable authentication_kerberos_service_key_tab Scope Global Dynamic No SET_VAR Hint Applies No Type File name ...If FIDO authentication is attempted and this value is not the one expected by the FIDO device, the device assumes that it is not talking to the correct server and an error ...authentication_kerberos_service_principal Command-Line Format --authentication-kerberos-service-principal=name Introduced 8.0.26 System Variable authentication_kerberos_service_principal Scope ...