Choosing the optimum
value for the READBUFF= option requires a detailed knowledge of the
data that is returned from the information map and of the environment
in which the SAS session runs. Buffering data reads can decrease network
activities and increase performance. However, higher values for the
READBUFF= option use more memory. In addition, setting a high value
for the READBUFF= option could yield stale data if the data source
is updated frequently.