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https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-ndbinfo-tc-time-track-stats.html
The tc_time_track_stats table provides time-tracking information obtained from the DBTC block (TC) instances in the data nodes, through API nodes access NDB. tc_time_track_stats presents this information as rows, with a row for each instance of the ...Each TC instance tracks latencies for a set of activities it undertakes on behalf of API nodes or other data nodes; these activities include transactions, transaction errors, key reads, key writes, unique index operations, failed key operations of any type, scans, failed scans, fragment scans, and failed fragment ...
https://dev.mysql.com/doc/refman/9.7/en/sys-format-time.html
Note format_time() is deprecated, and subject to removal in a future MySQL version. Applications that use it should be migrated to use the built-in FORMAT_PICO_TIME() function instead. See Section 14.22, “Performance Schema Functions” Given a ...Depending on the size of the value, the units part is ps (picoseconds), ns (nanoseconds), us (microseconds), ms (milliseconds), s (seconds), m (minutes), h (hours), d (days), or w ...
https://dev.mysql.com/doc/refman/9.7/en/sys-ps-is-instrument-default-timed.html
Returns YES or NO to indicate whether a given Performance Schema instrument is timed by default. Example mysql> SELECT sys.ps_is_instrument_default_timed('memory/innodb/row_log_buf'); ...
https://dev.mysql.com/doc/refman/9.7/en/windows-server-first-start.html
This section gives a general overview of starting the MySQL server. The following sections provide more specific information for starting the MySQL server from the command line or as a Windows service. The information here applies primarily if you ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-options-variables.html
--ndb-deferred-constraints=[0|1] Command-Line Format --ndb-deferred-constraints System Variable ndb_deferred_constraints Scope Global, Session Dynamic Yes SET_VAR Hint Applies No Type Integer Default Value 0 Minimum Value 0 Maximum Value 1 Controls ... This section provides information about MySQL server options, server and status variables that are specific to NDB ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-parameters.html
Many system variables can be changed at runtime (see Section 7.1.9.2, “Dynamic System Variables”). The --innodb-status-file option is intended for temporary use, as SHOW ENGINE INNODB STATUS output generation can affect performance, and the ...
https://dev.mysql.com/doc/refman/9.7/en/option-tracker-component-status-variables.html
option_tracker_usage:Connection control component The number of times that a failed connection attempt has been delayed. option_tracker_usage:Connection DoS control The number of times a failed connection attempt has been delayed. The Option ...
https://dev.mysql.com/doc/refman/9.7/en/server-status-variables.html
| Threads_created | 217 | | Threads_running | 88 | | Uptime | 1389872 | +-----------------------------------+------------+ Many status variables are reset to 0 by the FLUSH STATUS statement. Com_xxx The Com_xxx statement counter variables indicate ... The MySQL server maintains many status variables that provide information about its ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-system-variables.html
In the case of group-wide configuration settings, this is required, but if you are changing other settings, try to ensure that at least one member is running at all times. group_replication_autorejoin_tries specifies the number of tries that a ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-params-ndbd.html
HeartbeatIntervalDbDb: Time between data node-to-data node heartbeats; data node considered dead after 3 missed heartbeats. KeepAliveSendInterval: Time between keep-alive signals on links between data nodes, in milliseconds. LcpScanProgressTimeout: ... The listings in this section provide information about parameters used in the [ndbd] or [ndbd default] sections of a config.ini file for configuring NDB Cluster data ...