NDB Cluster Configuration Files When set to  1  or  ON , this variable enables batching of statements within the same transaction. To use this variable,  autocommit  must first be disabled by setting it to  0  or  OFF ; otherwise, setting transaction_allow_batching  has no effect. It is safe to use this variable with transactions that performs writes only, as having it enabled can lead to reads from the “before”  image. You should ensure that any pending transactions are committed (using an explicit  COMMIT  if desired) before issuing a  SELECT . transaction_allow_batching  should not be used whenever there is the possibility that the effects of a given statement depend on the outcome of a previous statement within the same transaction. This variable is currently supported for NDB Cluster only. The system variables in the following list all relate to the  ndbinfo  information database. Shows the name used for the  NDB  information database; the default is  ndbinfo . This is a read-only variable whose value is determined at compile time. Used in testing and debugging only. 4195 • ndbinfo_max_rows • ndbinfo_max_bytes • ndbinfo_database Important Default Value OFF System Variable ndbinfo_database Scope Global Dynamic No SET_VAR  Hint Applies No Type String Default Value ndbinfo Command-Line Format --ndbinfo-max-bytes=# System Variable ndbinfo_max_bytes Scope Global, Session Dynamic Yes SET_VAR  Hint Applies No Type Integer Default Value 0 Command-Line Format --ndbinfo-max-rows=# System Variable ndbinfo_max_rows Scope Global, Session Dynamic Yes