Installing Online Interfaces › How to Configure the Online Interfaces Without CA MSM › Install Cross-Memory Services › Step 2: Define Transaction and Programs to CICS › XMS Address Spaces

XMS Address Spaces

Be aware of the following:

• The primary RMOXMS region can be started with the XMSSUB=YES or XMSSUB=NO parameter.
• CICS has a router subtask in its region and does not require the XMSSUB=YES function. However, we recommend that you start the primary XMS region with XMSSUB=YES.
• If multiple RMOXMS regions are started, they must be started with XMSSUB=NO parameter.

  Only the primary XMS region can have XMSSUB=YES specified.

• The XMS regions must have the XMS=YES parameter to be accessible.
• The SUBSYS= parameter must match the EC0XMCTR table entry for the CICS transaction.
• The EBCXMCTR table must be assembled during installation to define the relationship between CA View and CA Deliver database high-level qualifiers.

  The table contains an EBCXMOPT macro to define initialization options and the EBCXMTRN macro for each CICS user transaction.

The EBCXMTRN macro also contains options for the specific database as follows:

• SUBSYS= parameter can be used to route the CA Deliver transaction to an alternate XMS subsystem ID. The SUBSYS= of the cross memory task must match the SUBSYS= parameter specified in the EBCXMCTR table entry.
• TRANID=parameter specifies the CA Deliver transaction identifier for CICS.
• RECON=YES can be used to allow reconnection (after a CICS terminal error) at the point of exit.

  Note: Do not specify RECON=YES if you use a multi‑session manager that assigns LU names from a pool of names. Coding RECON=YES under these conditions could allow a user to be connected to another user's session. For more information, see Multi‑Session Managers later in this chapter.

• TIMEOUT= specifies how long CICS is to wait for the XMS session to respond after the user enters input, in seconds.

  We recommend as high a value as possible but not less than 240 (4 minutes).