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The deprecated status variables continue to be shown in the output of SHOW STATUS , but applications should be updated as soon as possible not to rely upon them any longer, since their availability in future release series is not guaranteed. 

•The values ADD_TABLE_MASTER  and ADD_TABLE_SLAVE  previously shown in the tab_copy_status  column of the ndbinfo ndbinfo.table_distribution_status  table are deprecated. These are replaced by, respectively, the values ADD_TABLE_COORDINATOR  and ADD_TABLE_PARTICIPANT . 

•The --help  output of some NDB  client and utility programs such as ndb_restore  has been modified. 

• ThreadConfig enhancements.  As of NDB 8.0.23, the configurability of the ThreadConfig parameter has been extended with two new thread types, listed here: 

• query : A query thread works (only) on READ COMMITTED  queries. A query thread also acts as a recovery thread. The number of query threads must be 0, 1, 2, or 3 times the number of LDM threads. 0 (the default, unless using ThreadConfig , or AutomaticThreadConfig  is enabled) causes LDMs to behave as they did prior to NDB 8.0.23. 

