+-----------------------------+ | Data Memory Used, All Nodes | +-----------------------------+ | 6460 | +-----------------------------+ 1 row in set (0.37 sec) 

mysql> SELECT SUM(max) as ’Total IndexMemory Available’ > FROM memoryusage > WHERE memory_type = ’Index memory’; +-----------------------------+ | Total IndexMemory Available | +-----------------------------+ | 25664 | +-----------------------------+ 1 row in set (0.33 sec) 

ndbinfo  table and column names are case-sensitive (as is the name of the ndbinfo  database itself). These identifiers are in lowercase. Trying to use the wrong lettercase results in an error, as shown in this example: 

mysql> SELECT * FROM nodes; +---------+--------+---------+-------------+ | node_id | uptime | status | start_phase | +---------+--------+---------+-------------+ | 1 | 13602 | STARTED | 0 | | 2 | 16 | STARTED | 0 | +---------+--------+---------+-------------+ 2 rows in set (0.04 sec) mysql> SELECT * FROM Nodes; ERROR 1146 (42S02): Table ’ndbinfo.Nodes’ doesn’t exist 

mysqldump  ignores the ndbinfo  database entirely, and excludes it from any output. This is true even when using the --databases  or --all-databases  option. 

NDB Cluster also maintains tables in the INFORMATION_SCHEMA  information database, including the FILES  table which contains information about files used for NDB Cluster Disk Data storage, and the ndb_transid_mysql_connection_map  table, which shows the relationships between transactions, transaction coordinators, and NDB Cluster API nodes. For more information, see the descriptions of the tables or Section 23.5.15, “INFORMATION_SCHEMA Tables for NDB Cluster” . 

## 23.5.14.1 The ndbinfo arbitrator_validity_detail Table 

The arbitrator_validity_detail  table shows the view that each data node in the cluster has of the arbitrator. It is a subset of the membership  table. 

The arbitrator_validity_detail  table contains the following columns: 

• node_id 

This node’s node ID 

• arbitrator 

Node ID of arbitrator 

• arb_ticket 

Internal identifier used to track arbitration 

• arb_connected 

