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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. 

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• Ndb_pruned_scan_count 

## Note 

Executing EXPLAIN  on joins that can be pushed down to NDB  does not add to this number. 

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 

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## 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. 

