Cheryl Watson’s Tuning Letter

1991 Tuning Letters

Access the 1991 Tuning Letter Downloads

December 1991 (14 pages)

MVS Review
  • Exchange Swapping
  • ISV
FOCUS: IPS Design
  • Defining Exchange Swapping (SP 4.2)
  • Defining Exchange Swapping (Pre 4.2)
  • Summary of IPS Design
  • Converting to SP 4.2
Miscellaneous
  • Dedicated & Shared LPARs

November 1991 (26 pages)

MVS Review
  • SRM Second
  • Service Rate
  • MPL Determination
FOCUS: IPS Design
  • Determining Domains
  • Setting MPL Thresholds
  • Defining Domains
  • Evaluating Domains
Miscellaneous
  • Deleted Trace Elements
  • Feedback
  • PDS Blocksizes
  • More on IDRC
  • VSAM Comments
  • Estimating ESTOR
  • Tuning DASD
  • ESTOR Page Movement
Supplements
  • RMF Part 1: Trace (4 pages)
  • SRM Service Objectives (6 pages)

October 1991 (18 pages)

FOCUS: Designing A New IPS (SP 4.2)
  • Updating the ICS and IPS
  • Creating an ICS
  • Defining Periods
  • Determining Priorities
  • Assigning PGNs
  • Defining Domains
Miscellaneous
  • Tuning VSAM Under CICS

September 1991 (22 pages)

FOCUS: Tuning VSAM
  • General VSAM Tuning Tips
  • Tuning ESDS Files
  • Tuning RRDS Files
  • Tuning KSDS Files
  • Tuning KSDS Buffers – NSR
  • Tuning KSDS Buffers – LSR
  • Using Batch LSR
  • VSAM Bibliography
MVS Review
  • VSAM Basics
MVS Measurements
  • VSAM LISTCAT
  • SMF Records
Feedback
  • SMF Dumping

Update Sheet Issued 2/94 

August 1991 (22 pages)

Determining Workloads
Finding System Constraints
FOCUS: Reducing CPU
  • Reducing Monitors
  • Reducing MVS Overhead
  • Tuning Applications
  • Alternatives
Feedback
  • TSO Recovery

July 1991 (19 pages)

FOCUS: Reducing I/O
  • Increasing Tape Blocksizes
  • Using IDRC
  • Increasing DASD Blocksizes
  • Increasing Buffers
  • Unnecessary I/Os
  • Using VB Files
I/O Product Bibliography
Tuning Bibliography
On a Personal Note
Feedback

Update Sheet 8/91 

June 1991 (22 pages)

FOCUS: MVS/ESA Measurements
  • I/O Measurements
  • CPU Measurements
  • Storage Measurements
  • MVS/ESA Facilities
  • Other Measurements
MVS Review
  • SMF Records
Feedback
  • Uploading DB2 Tables
  • TSO Recovery

Update Sheet 5/92 

May 1991 (24 pages)

MVS Review
  • Paging & Swapping
MVS Measurements
  • Paging & Swapping
FOCUS: Tuning Paging & Swapping
  • Page & Swap Data Sets
  • Swapping to Page Data Sets
  • Swapping to Swap Data Sets
  • Combining PLPA & Common
  • Unnecessary Swaps
Miscellaneous
  • Amdahl’s MDF
  • Something Old, Something Blue
  • Reblocking SMF
Feedback

Update Sheet 9/91 

April 1991 (26 pages)

MVS Review
  • What’s An EXCP?
  • DASD I/O Explained
MVS Measurements
  • How To Measure I/O
FOCUS: Tuning DASD
  • Reducing PEND Time
  • Reducing IOSQ Time
  • Reducing Disconnect Time
  • Controlling Connect Time
RMF Report JCL

Update Sheet Issued 11/93 

March 1991 (22 pages)

FOCUS: Central Storage
  • Fencing Loved Ones
  • Limiting Baddies
Other Tips
  • Reducing I/O Elongation
  • New PR/SM APAR
  • Reblocking SMF
MVS Review
  • SRM Service Units
  • Storage Isolation Overview

Update Sheet Issued 12/96 

February 1991 (28 pages)

FOCUS: PR/SM
  • Nature of PR/SM Overhead
  • Computing Overhead Without a Benchmark
  • Changing SRM Parameters
  • PR/SM Tuning Tips
  • PR/SM Bibliography
FOCUS: Central Storage
  • Reducing Storage Movement
MVS Review
  • PR/SM Overview
  • UIC and Page Stealing
MVS Measurements
  • Calculating Capture Ratio
  • CPU Under PR/SM
  • Determining CSTOR Users
Feedback
Miscellany

Update Sheet Issued 3/91 

January 1991 (16 pages)

FOCUS: Tuning TSO
  • Reducing ISPF Response
  • Eliminating TSO STEPLIBs
  • Reducing O/P Wait Swaps
  • Reducing TSO Period Swaps
  • Invoking CLISTs Faster
  • Reducing CLIST Response
  • Consistent Response
MVS Review
  • MVS Program Fetch
MVS Measurements
  • TSO Response Time
  • TSO Command Use
Miscellany

Update Sheet Issued 9/95 

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