Starting Your Product › Prepare to Start Your Product › Increase ASIDs (Optional)

Increase ASIDs (Optional)

When the CA SYSVIEW main address space is stopped multiple times, and you are not using ASID reuse:

• You can run out of address space identifiers (ASIDs).
• You would need to IPL your system to obtain additional ASIDs.

To avoid having to IPL your system, use the following procedure to increase the number of ASIDs.

Follow these steps:

1. Access the RSVNONR in the member IEASYSxx of SYS1.PARMLIB.
2. Increase the RSVNONR size to accommodate the number of times you could start and stop address spaces that define a system linkage index (System LX) within the life of an IPL.

Note: When you run out of ASIDs, messages alert you of the failed address space creation and to IPL to obtain additional ASIDs.

System Linkage Index and ASID Reuse

System Linkage Index

A linkage index is reserved as a reusable System LX if the "ASN and LX reuse" facility is installed.

If the "ASN and LX reuse" facility is installed, the reusable System LX can be reserved. When the SYSVIEW Main Address Space is stopped, the system can reuse the System LX.

If the "ASN and LX reuse" facility is not installed, the System LX becomes dormant when the SYSVIEW Main Address Space is stopped. When the SYSVIEW Main Address Space is restarted, CA SYSVIEW reclaims the previously used System LX.

Note: Parameter NSYSLX specifies the number of additional linkage indexes, LXs, to be reserved. However, because the product reuses the System LX, you do not need to increase this number.

Reusable ASIDs

When the SYSVIEW Main Address Space is terminated, the ASID may become unavailable for use. This is due to a System LX being reserved. The ASID can be reused if all the following are true:

1. ASN and LX reuse facility is installed
2. REUSASID(YES) must be specified in the DIAGxx SYS1.PARMLIB member
3. The SYSVIEW Main Address Space started task must be started with the REUSASID=YES parameter:

   S SYSVIEW,REUSASID=YES