Summary of changes for z/OS 3.1

Updates for enhancements that are available:

• A new use case for recovery process boost in zIIP boost and Configuring Processors During a Boost Period.
• Transient zIIP processing enhancements in zIIP boost.
• Editorial changes to the description of message IEE687I to update middleware startup and add dynamic I/O activate recovery process boost types in Messages.
• SMF record enhancements in SMF details.

Updates for enhancements that are available with the PTFs for APAR OA60660 (which also applies to z/OS V2R4), to expand and improve updates that were added on 4/5/2022.

• New descriptions of PROCs in PROCs
• Editorial changes to the description of message IEE258I, which replaces IEE257I as the response to the D IPLINFO,BOOST,STATE command, with additional information about recovery process boost, in Messages.

Updates for enhancements that are available with the PTFs for APAR OA60660 (which also applies to z/OS V2R4). Some require the IBM z16; this is indicated in the topics that describe them.

• Introduction of new recovery process boost use cases, in Overview of System Recovery Boost
• Prerequisites for new recovery process boost use cases, in Prerequisites
• Planning for the new IEASRB proc to enable or disable recovery process boost, in What do I need to do?
• New descriptions of PROCs in PROCs
• Enabling new recovery process boost use cases, in Turning on System Recovery Boost
• Boosting SVC dumps, middleware region startup, and loading HyperSwap configuration information, in Recovery process boost
• Commands and other controls for recovery process boosts, in Managing recovery process boost
• Messages related to the new recovery process boost use cases in Automation Considerations
• WLM changes
• WLM changes for middleware region startup recovery process boost
• A Boost attribute in SMF record type 79 subtype 1 (address space state data) and subtype 2 (address space resource data) in SMF changes
• A Boost value in z/OS Data Gatherer Monitor III Address space identification table (ERBASIG3), in z/OS Data Gatherer changes
• An address space’s Boost attribute in the SYSEVENTs REQASD and REQFASD, in Other system changes
• New messages IEA688I and IEA689I, in Messages
• Message IEE258I, which replaces IEE257I as the response to the D IPLINFO,BOOST,STATE command, with additional information about recovery process boost, in Messages
• Message IEE857I, which now shows the value for the minimum dump size for boosting SVC dumps, and new message IEE863I, which is displayed in response to a ISPLAY DUMP,INFO command, in Messages
• Boost attributes in IWMSVDCR and IWMWRQAA in MVS Data Areas
• Details for z/OS Data Gatherer, SMF. and WLM in z/OS Data Gatherer details, SMF details and WLM details