AIRDELAY

The AIRDELAY system initialization parameter specifies the delay period that elapses after an emergency restart before autoinstalled terminal and APPC connection entries that are not in session are deleted.

Defining AIRDELAY

You can define the AIRDELAY system initialization parameter in the following ways:
  • On the PARM parameter of the EXEC PGM=DFHSIP statement
  • In the SYSIN data set of the CICS® start up job stream
  • Through the system console
  • In the DFHSIT macro

Values for AIRDELAY

Valid values for the AIRDELAY system initialization parameter are as follows:

AIRDELAY={700|hhmmss}
The AIRDELAY system initialization parameter also applies when you issue a z/OS® Communications ServerCEMT SET VTAM OPEN command after a z/OS Communications Server abend and PSTYPE=MNPS is coded. This causes autoinstalled resources to be deleted, if the session was not restored and has not been used since the ACB was opened.

The AIRDELAY system initialization parameter does not apply to the following types of autoinstalled APPC connection, which are always written to the CICS global catalog and recovered during a warm or emergency start:

  • Sync level 2-capable connections (for example, CICS-to-CICS connections)
  • Sync level 1-capable, limited resource connections installed on a CICS that is a member of a generic resource group
700
700 is the default value for AIRDELAY.
hhmmss
A 1-to 6-digit number. If you leave out the leading zeros, they are supplied. 700 is the default value for AIRDELAY, meaning a delay of 7 minutes. A value of 0 means that autoinstalled definitions are not written to the global catalog and therefore are not restored at an emergency restart.

For guidance about the performance implications of setting different AIRDELAY values, see MVS and DASD: improving performance.