k2_delta_errors - The delta failed transactions are reported to this table
k2_read_pos - for common only; stores offset in Kafka; it is required to allow common backup. To see status - instead of looking at this table - run ref_status command
k2_transactions_info - contains information about each transaction
what is the use of these tables and what type of information will be stored there.
_k2_delta_errors
_k2_read_pos
_k2_transactions_info