Apache Hive : HiveCounters

Task counters created by Hive during query execution

 

For Tez execution, %context is set to the mapper/reducer name. For other execution engines it is not included in the counter name.

Counter Name	Description
RECORDS_IN[_%context]	Input records read
RECORDS_OUT[_%context]	Output records written
RECORDS_OUT_INTERMEDIATE[_%context]	Records written as intermediate records to ReduceSink (which become input records to other tasks)
CREATED_FILES	Number of files created
DESERIALIZE_ERRORS	Deserialization errors encountered while reading data