Specifies the maximum amount of unread record data that can be buffered.
It is defined in units of 160 bytes. The range of this value is from RECORD_OPEN_MIN_RECORDS
to RECORD_OPEN_MAX_RECORDS.
If you use the historics parameter
in the RECORD_CHANNEL_START_ST structure, you are recommended to
use a value of 200 for max_records. The minimum value you should
use is historics + 30.