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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 ...
https://dev.mysql.com/doc/refman/8.0/en/replication-implementation.html
Replication is based on the source server keeping track of all changes to its databases (updates, deletes, and so on) in its binary log. The binary log serves as a written record of all events that modify database structure or content (data) from ...Each replica that connects to the source requests a copy of the binary ...See Section 10.14, “Examining Server Thread ...
https://dev.mysql.com/doc/refman/8.0/en/security-guidelines.html
When running MySQL, follow these guidelines: Do not ever give anyone (except MySQL root accounts) access to the user table in the mysql system database! This is critical. In most cases, you can check whether MySQL data streams are unencrypted by ...
https://dev.mysql.com/doc/refman/8.0/en/symbolic-links-to-databases.html
On Unix, symlink a database using this procedure: Create the database using CREATE DATABASE: mysql> CREATE DATABASE mydb1; Using CREATE DATABASE creates the database in the MySQL data directory and permits the server to update the data dictionary ...