z/OS Performance Improvements That Require Explicit Enablement

[Ed_Arnold]

I've been asked to provide a concise list of the items that are covered more extensively here:

http://ODUG.net/index.php?topic=1682.0


1. Base z/OS Operating system

  a) USEZOSV1R9RULES(NO)

  b) MEMDSENQMGMT:  ENABLE

  c) COFVLFxx parameters that, at a minimum, should be specified


2. JES2

  a) auto-tuning of the JES2 checkpoint (at Z22 mode): 

    https://www.ibm.com/support/knowledgecenter/SSLTBW_2.2.0/com.ibm.zos.v2r2.hasa300/has2v5_automatic_approach.htm


3. zFS - At z/OS V2.1 a new version or release was made for zFS V1.5 or V5


If anyone has any additional please append or drop me a note.


Ed