Overview of NDB Cluster Configuration Parameters, Options, and Variables • Ndb_conflict_trans_row_conflict_count : Number of rows found in conflict by transactional conflict function. Includes any rows included in or dependent on conflicting transactions. • Ndb_conflict_trans_row_reject_count : Total number of rows realigned after being found in conflict by transactional conflict function. Includes Ndb_conflict_trans_row_conflict_count and any rows included in or dependent on conflicting transactions. • ndb_data_node_neighbour : Specifies cluster data node "closest" to this MySQL Server, for transaction hinting and fully replicated tables. • ndb_default_column_format : Sets default row format and column format (FIXED or DYNAMIC) used for new NDB tables. • ndb_deferred_constraints : Specifies that constraint checks should be deferred (where these are supported). Not normally needed or used; for testing purposes only. • ndb_dbg_check_shares : Check for any lingering shares (debug builds only). • ndb-schema-dist-timeout : How long to wait before detecting timeout during schema distribution. • ndb_distribution : Default distribution for new tables in NDBCLUSTER (KEYHASH or LINHASH, default is KEYHASH). • Ndb_epoch_delete_delete_count : Number of delete-delete conflicts detected (delete operation is applied, but row does not exist). • ndb_eventbuffer_free_percent : Percentage of free memory that should be available in event buffer before resumption of buffering, after reaching limit set by ndb_eventbuffer_max_alloc. • ndb_eventbuffer_max_alloc : Maximum memory that can be allocated for buffering events by NDB API. Defaults to 0 (no limit). • Ndb_execute_count : Number of round trips to NDB kernel made by operations. • ndb_extra_logging : Controls logging of NDB Cluster schema, connection, and data distribution events in MySQL error log. • ndb_force_send : Forces sending of buffers to NDB immediately, without waiting for other threads. • ndb_fully_replicated : Whether new NDB tables are fully replicated. • ndb_index_stat_enable : Use NDB index statistics in query optimization. • ndb_index_stat_option : Comma-separated list of tunable options for NDB index statistics; list should contain no spaces. • ndb_join_pushdown : Enables pushing down of joins to data nodes. • Ndb_last_commit_epoch_server : Epoch most recently committed by NDB. • Ndb_last_commit_epoch_session : Epoch most recently committed by this NDB client. • ndb_log_apply_status : Whether or not MySQL server acting as replica logs mysql.ndb_apply_status updates received from its immediate source in its own binary log, using its own server ID. • ndb_log_bin : Write updates to NDB tables in binary log. Effective only if binary logging is enabled with --log-bin. • ndb_log_binlog_index : Insert mapping between epochs and binary log positions into ndb_binlog_index table. Defaults to ON. Effective only if binary logging is enabled. 4049