RDS= parameter for procedures

Use the RDS= parameter to specify the buffer size to be used for the restart data set (IMS.RDS).

You can specify a value in the range from 1024 to 32,760. Specifying the maximum 32K buffer size value (RDS=32,760) is suitable as a general practice because it offers the best system performance and storage impact is minimal. If you do not specify a value for this parameter, IMS sets a default size of 4096 for the IMS.RDS data set.

Important: If you change the value of this parameter and then you restart the IMS system, you must ensure that either the FORMAT RS or the FORMAT ALL keyword is specified on the /ERESTART or /NRESTART command. If not, the restart can fail.