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https://dev.mysql.com/doc/refman/8.0/en/information-schema-columns-table.html
The related ST_GEOMETRY_COLUMNS table provides information about table columns that store spatial data. TABLE_SCHEMA The name of the schema (database) to which the table containing the column belongs. The DATA_TYPE value is the type name only with ...The COLUMNS table has these columns: TABLE_CATALOG The name of the catalog to which the table containing the column ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-install-shutdown-restart.html
To restart the cluster on Unix platforms, run these commands: On the management host (198.51.100.10 in our example setup): $> ndb_mgmd -f /var/lib/mysql-cluster/config.ini On each of the data node hosts (198.51.100.30 and 198.51.100.40): $> ndbd Use ... To shut down the cluster, enter the following command in a shell on the machine hosting the management node: $> ndb_mgm -e shutdown The -e option here is used to pass a command to the ndb_mgm client from the ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-logs-event-buffer.html
NDB uses one or more memory buffers for events received from the data nodes. There is one such buffer for each Ndb object subscribing to table events, which means that there are usually two buffers for each mysqld performing binary logging (one ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-backup-id.html
This table provides a way to find the ID of the backup started most recently for this cluster. The backup_id table contains a single column id, which corresponds to a backup ID taken using the ndb_mgm client START BACKUP command.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-config-values.html
param_name IN ('NodeId', 'NoOfReplicas', 'HostName', 'DataMemory', 'IndexMemory', 'TotalSendBufferMemory')\G The output from this query when run on a small NDB Cluster with 2 data nodes used for simple testing is shown here: ... The config_values ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-counters.html
The counters table provides running totals of events such as reads and writes for specific kernel blocks and data nodes. The counters table contains the following columns: node_id The data node ID block_name Name of the associated NDB kernel block ...Counts are kept from the most recent node start or restart; a node start or restart resets all counters on that ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-dictionary-tables.html
dictionary_tables contains the columns listed here: table_id The table' unique ID database_name Name of the database containing the table table_name Name of the table status The table status; one of New, Changed, Retrieved, Invalid, or Altered.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-membership.html
The membership table describes the view that each data node has of all the others in the cluster, including node group membership, president node, arbitrator, arbitrator successor, arbitrator connection states, and other information. In a normal ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-gr-memory-monitoring-ps-sample-queries.html
The memory data can be queried for individual events, for example: SELECT * FROM performance_schema.memory_summary_global_by_event_name WHERE EVENT_NAME = 'memory/group_rpl/write_set_encoded'\G *************************** 1. row ... This section ...
https://dev.mysql.com/doc/refman/8.0/en/precision-math-numbers.html
The scope of precision math for exact-value operations includes the exact-value data types (integer and DECIMAL types) and exact-value numeric literals. The DECIMAL data type is a fixed-point type and calculations are exact. The FLOAT and DOUBLE ...