NDB Cluster Configuration Files The number of joins successfully pushed down to  NDB  and executed there. • Ndb_pushed_reads The number of rows returned to  mysqld  from the NDB kernel by joins that were pushed down. Note Executing  EXPLAIN  on joins that can be pushed down to  NDB  does not add to this number. • Ndb_pruned_scan_count This variable holds a count of the number of scans executed by  NDBCLUSTER  since the NDB Cluster was last started where  NDBCLUSTER  was able to use partition pruning. Using this variable together with  Ndb_scan_count  can be helpful in schema design to maximize the ability of the server to prune scans to a single table partition, thereby involving replica only a single data node. • Ndb_replica_max_replicated_epoch The most recently committed epoch on this replica. You can compare this value with Ndb_conflict_last_conflict_epoch ; if  Ndb_replica_max_replicated_epoch  is the greater of the two, no conflicts have yet been detected. For more information, see Section 23.6.11, “NDB Cluster Replication Conflict Resolution” . • Ndb_scan_count This variable holds a count of the total number of scans executed by  NDBCLUSTER  since the NDB Cluster was last started. • Ndb_slave_max_replicated_epoch Note Deprecated in NDB 8.0.23; use  Ndb_slave_max_replicated_epoch  instead. The most recently committed epoch on this replica. You can compare this value with Ndb_conflict_last_conflict_epoch ; if  Ndb_slave_max_replicated_epoch  is the greater of the two, no conflicts have yet been detected. For more information, see Section 23.6.11, “NDB Cluster Replication Conflict Resolution” . • Ndb_system_name If this MySQL Server is connected to an NDB cluster, this read-only variable shows the cluster system name. Otherwise, the value is an empty string. • Ndb_trans_hint_count_session The number of transactions using hints that have been started in the current session. Compare with Ndb_api_trans_start_count_session  to obtain the proportion of all NDB transactions able to use hints. Added in NDB 8.0.17. 4219