Summary of changes for z/OS 3.1
z/OS V3R1 updates (6/26/25)
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.
z/OS V2R5 updates (5/26/22)
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.
z/OS V2R5 updates (4/5/22)
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