NDB Cluster Configuration Files Although this variable can be read using either  SHOW GLOBAL STATUS  or  SHOW SESSION STATUS , it relates to the current session only, and is not affected by any other clients of this  mysqld . For more information, see Section 23.5.13, “NDB API Statistics Counters and Variables” . The number of operations by this replica based on or using unique keys. Although this variable can be read using either  SHOW GLOBAL STATUS  or  SHOW SESSION STATUS , it is effectively global in scope. If this MySQL server does not act as a replica, or does not use NDB tables, this value is always 0. For more information, see Section 23.5.13, “NDB API Statistics Counters and Variables” . • Ndb_api_uk_op_count_replica • Ndb_api_uk_op_count_slave Note Deprecated in NDB 8.0.23; use  Ndb_api_uk_op_count_replica  instead. The number of operations by this replica based on or using unique keys. Although this variable can be read using either  SHOW GLOBAL STATUS  or  SHOW SESSION STATUS , it is effectively global in scope. If this MySQL server does not act as a replica, or does not use NDB tables, this value is always 0. For more information, see Section 23.5.13, “NDB API Statistics Counters and Variables” . • Ndb_api_uk_op_count • Ndb_api_wait_exec_complete_count_session 4211 Although this variable can be read using either  SHOW GLOBAL STATUS  or  SHOW SESSION STATUS , it relates to the current session only, and is not affected by any other clients of this  mysqld . For more information, see Section 23.5.13, “NDB API Statistics Counters and Variables” . The number of times a thread has been blocked in this client session while waiting for execution of an operation to complete. This includes all  execute()  calls as well as implicit executes for blob and auto- increment operations not visible to clients. For more information, see Section 23.5.13, “NDB API Statistics Counters and Variables” . Although this variable can be read using either  SHOW GLOBAL STATUS  or  SHOW SESSION STATUS , it is effectively global in scope. The number of operations by this MySQL Server (SQL node) based on or using unique keys.