The following presentations are available here either for download or to view here on the web. If you have comments or suggestions, let me know.

• z/VM System Limits -- Last updated June 19, 2008
  How large can z/VM systems be in theory? in practice? This presentation describes some known limits, explains how to track where you are in reference to the limits, and discusses practical considerations.

• z/VM Virtualization Basics -- Last updated June 19, 2008
  The word virtualization appears in more and more places these days. This presentation covers what virtualization means in a z/VM system and some of the basic implementation concepts. It is a good overview of z/VM.

• VM Considerations for Guest Performance -- Last updated May 21, 2003
  This presentation covers various considerations and features for getting better performance for guests such as Linux.

• VM Performance Update 2002 -- Last Updated May 29, 2002
  This presentation covers the z/VM releases from 3.1.0 to 4.3.0.

• VM Performance 101 -- Last Updated February 15, 2002
  This presentation is an introduction to VM Performance. It includes guidelines on measurement, configuration, and tuning. This presentation has been a work in progress, with the latest improvement being speaker notes thanks to Brian Wade.

• VM Performance Update 2001 -- Last Updated June 21, 2001
  This presentation covers performance of z/VM 3.1.0 and some Linux connectivity performance.

• VM/ESA Case Studies 2000 -- Last Updated April 10, 2000
  The presentation walks through five new case studies. VMPRF, RTM, and other tools are illustrated.

• VM/ESA 2.4.0 Performance Update -- Last Updated November 1999
  The presentation discusses performance related changes in VM/ESA 2.4.0. In addition, includes some information on ADSM Version 2 and other VM related performance changes.

• VM/ESA Performance Case Studies 1999 -- Last Updated November 1999
  The presentation walks through five case studies. If you ever wondered what I did from day to day, this presentation will give you a better understanding.

• Performance Analysis for VM Applications -- Last Updated August 1998.

• VM/ESA 2.3.0 Performance Update -- Last Updated September 1998.

• Various TCP/IP Performance Presentations
  • VM/ESA TCP/IP 310 Performance -- Last Updated September 1998

  • TCP/IP Care and Feeding for Performance -- Last Updated August 1998

  • VM/ESA TCP/IP 2.4.0 Performance -- Last Updated August 1997.

• VM/ESA Data in Memory Techniques -- Last Updated August 1997.

• VM/ESA 2.2.0 Performance Update -- Last Updated March 1997.

• SFS Performance Management Part I -- Last Updated February 1997.

  This session provides an understanding of Shared File System (SFS) performance management. The presentation will cover performance tasks, such as preventing performance problems, monitoring performance, and solving performance problems. Tuning tips and a case study will be included. The discussion will center on SFS in VM/ESA, but a few concepts apply to the 370 Feature of VM/ESA. Attendees should have some familiarity with SFS, but they need not be experts.

• SFS Performance Management Part II - Mission Possible -- Last Updated February 1997.

  The Intro to SFS Performance Management session discussed the basics of Shared File System (SFS) performance management. And if you attended, you learned you do not need to be an SFS expert to manage the SFS performance. Now we will go a step further and try and combine SFS internals with performance. What are those things inside SFS called agents? Are they spies or part of some covert action? If you choose to attend this session, you will learn to tell the good agents from the misbehaving agents, when VM data space exploitation is appropriate, and what all those counters from QUERY FILEPOOL REPORT really mean. As always, if the speaker gets too silly, his management will deny any knowledge of his action. Hope to see you for this Mission: Possible.

• VM/ESA Greater N-way Thoughts -- Last Updated October 1996.

  VM/ESA has provided support for running on a real multiprocessing environment and for virtual machines with multiple virtual processors ever since VM/ESA existed. However, hardware and software advances have customers asking questions about VM/ESA and MP environments. The huge improvements in price/performance offered by CMOS processor technology raises the question of how well does VM handle N-way support. The recent support added to VSE/ESA 2.1 for multi-processor support raises questions of how to set up and tune a virtual n-way guest. This session reviews the traditional VM/ESA real and virtual MP support and ties that into the new technology. Key considerations for these new environments will be covered to keep you and your users happy.

• The VM/ESA Scheduler Made Simple -- Last Updated October 1996.

  This session is designed to remove some of the mystery of the VM/ESA scheduler. You'll learn the difference between relative and absolute share settings and how to use (or not use) other SRM tuning parameters. You'll also learn what 'surplus' share really means and additional details on the limit share (or share capping) added in VM/ESA 1.2.2.

• VM for VSE Guest Performance html or Newer version in PDF -- Last Updated October 1999.

  Is VM good for VSE Performance? Bill Bitner of IBM's VM Performance Evaluation department answers that question with "It depends!". This presentation will look at what it depends on, what is meant by performance, and factors that include V=R/F/V guests, enhanced minidisk cache, virtual disk in storage, CCW translation, and hardware assists.

• What is Good Monitor Data? -- Last Updated 1992

  An old presentation that describes use Monitor data and what things should be added to the monitor. The audience was primarily CP developers, but others might find it interesting.

• Care and Feeding of Monitor APPLDATA -- Last Updated 1992.

  An old presentation that describes use of Diagnose DC to contribute data to the CP monitor in the APPLDATA domain. Note this does not include the new function codes for the diagnose added in VM/ESA 2.3.0 for generation of Config and Event records.