NDB API Statistics Counters and Variables Counter Name Description Status Variables (by statistic type): •Session •Slave (replica) •Injector •Server TransCloseCount Number of transactions aborted. (This value may be greater than the sum of  TransCommitCount and  TransAbortCount .) • Ndb_api_trans_close_count_session • Ndb_api_trans_close_count_slave •[none] • Ndb_api_trans_close_count PkOpCount Number of operations based on or using primary keys. This count includes blob-part table operations, implicit unlocking operations, and auto-increment operations, as well as primary key operations normally visible to MySQL clients. • Ndb_api_pk_op_count_session • Ndb_api_pk_op_count_slave •[none] • Ndb_api_pk_op_count UkOpCount Number of operations based on or using unique keys. • Ndb_api_uk_op_count_session • Ndb_api_uk_op_count_slave •[none] • Ndb_api_uk_op_count TableScanCount Number of table scans that have been started. This includes scans of internal tables. • Ndb_api_table_scan_count_session • Ndb_api_table_scan_count_slave •[none] • Ndb_api_table_scan_count RangeScanCount Number of range scans that have been started. • Ndb_api_range_scan_count_session • Ndb_api_range_scan_count_slave •[none] • Ndb_api_range_scan_count PrunedScanCount Number of scans that have been pruned to a single partition. • Ndb_api_pruned_scan_count_session • Ndb_api_pruned_scan_count_slave •[none] • Ndb_api_pruned_scan_count 4516