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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:

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 when 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 and the SYSVIEW Main Address Space stops, the System LX becomes dormant. When the SYSVIEW Main Address Space is restarted, CA SYSVIEW reclaims the previously used System LX.

Note: Parameter NSYSLX specifies the number of 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 can become unavailable for use due to a System LX being reserved. The ASID can be reused when all the following conditions are true:

  1. ASN and LX reuse facility is installed.
  2. REUSASID(YES) is specified in the DIAGxx member of the SYS1.PARMLIB.
  3. The SYSVIEW Main Address Space started task is started with the parameter REUSASID=YES: 
    S SYSVIEW,REUSASID=YES
  4. The WebSphere MQ data collection task, MQSDATA, uses the WebSphere MQ MQI to gather MQ performance data.

    WebSphere MQ does not support address spaces that are started in the SYSVIEW Main Address Space with REUSASID=YES. Using this method causes an abend with an S0D3 abend code.

  5. The IMS Common Queue Server task, IMSCQS, uses the IMS Common Queue Server APIs to gather IMS Shared Message Queue performance data.

    The IMS CQS address space APIs do not support clients that are started in the SYSVIEW Main Address Space with REUSASID=YES. Using this method causes an abend with an S0D3 abend code.