MySQL 5.7 Release Notes
Two INFORMATION_SCHEMA tables provide
information that is of particular use when managing an NDB Cluster
. The FILES table provides
information about NDB Cluster Disk Data files. The
ndb_transid_mysql_connection_map
table provides a mapping between transactions, transaction
coordinators, and API nodes.
Additional statistical and other data about NDB Cluster
transactions, operations, threads, blocks, and other aspects of
performance can be obtained from the tables in the
ndbinfo database. For
information about these tables, see
Section 21.6.15, “ndbinfo: The NDB Cluster Information Database”.