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At a glance
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Course number U3727S
Length 5 days
Delivery method Instructor-led training (ILT)
Onsite dedicated training (OST)
Price USD $4,000

Course overview

This 5-day, hands-on, lecture/lab course presents OpenVMS performance under three subsystems: memory management, I/O, and CPU.


Prerequisites

Students should have a fundamental understanding of system management and be able to:

  • Set up accounts
  • Use SYSGEN/SYSMAN to change a system parameter.
  • Run AUTOGEN.
  • Use the INSTALL utility.
  • INITIALIZE and MOUNT a disk.

Students should also have a fundamental understanding of programming concepts, including:

  • Understanding the purpose of a compiler.
  • Understanding the purpose of a linker.
  • Understanding how a computer executes a program.

Audience

OpenVMS system managers, applications programmers, and system programmers.


Ways to save

Benefits to you

Upon completing this course, students should be able to:

  • Interpret performance metrics supplied by:
    • The MONITOR utility.
    • DCL commands including: SHOW SYSTEM SHOW.
    • STATUS SHOW MEMORY.
    • The INSTALL utility.
  • Identify bottlenecks in the following subsystems:
    • Memory Management.
    • I/O.
    • CPU.
  • Size working set parameters.
  • Monitor page file space.
  • Describe the advantages of balancing disk I/O.
  • Improve the performance characteristics of indexed files using the CONVERT utility.
  • Identify factors contributing to time spent executing in processor modes.
  • Describe file locking design considerations to attain good performance.
  • Monitor distributed lock traffic and impact its performance.
  • Identify the impact of changing key system parameters.

Next Steps

  • TCP/IP Services for HP OpenVMS U3728S

Course Objective

Students attending this course should leave with an understanding of:

  • How to isolate performance bottlenecks to one of the three subsystems.
  • The effects of SYSGEN parameters on each of the subsystems, when to change these parameters, and when other management modifications or the purchase of new hardware will be required.
  • Sufficiency (keeping the system running), as well as tuning considerations.
  • The relative merits/drawbacks of using AUTOGEN
Students attending this course should not expect to work with network performance or to find a magic system parameter that will make their system run faster.

Detailed Course Outline

General Performance Topics

  • Module Outline.
  • Performance Issues.
  • Performance Bottlenecks.
  • OpenVMS Performance Metrics.
  • OpenVMS Performance Tools.

Layout of Virtual Address Space

  • Module Outline.
  • Layout of Virtual Address Space (VAX, Alpha, I64).
  • Address Space.
  • OpenVMS Alpha Memory Management.
  • P0 Space Contents.
  • P1 Space Layout.
  • System Space Layout (Alpha, I64).
  • System Space.
  • S0/S1 Space.
  • Monitoring Pool.
  • Nonpaged Pool Reclamation.
  • Pool Zones.
  • Lock Manager Use of Pool Zones.

Image Activation and Paging

  • Module Outline.
  • Paging Compared to Swapping.
  • Address Translation.
  • Page Faults.
  • Locating Pages in Virtual Memory.
  • Producing an Image File.
  • Image Activation and Paging.
  • Image Activation.
  • Free Page List.
  • Valid Pages and the Working Set List.
  • Free List Fault Rate.
  • Modified List Fault Rate.
  • Secondary Hard Faults.

Interpreting Paging Metrics

  • Module Outline.
  • Sample Display from $Monitor Page.
  • Interpreting the $Monitor Page Display.
  • Interpreting Paging Metrics.
  • $SHOW MEMORY (Alpha, I64).
  • $MONITOR Page.

Working Sets and Automatic Working Set Adjustment

  • Module Outline.
  • Working Set List.
  • Working Set Size vs. Working Set List Size.
  • Parameters Affecting the Working Set List Size.
  • Automatic Working Set Adjustment.
  • Working Set Performance Considerations.
  • AWSA Performance Considerations.
  • AWSA Parameters.

Locality and Paging Performance

  • Module Outline.
  • Locality.
  • Locality Issues.
  • Effects of Poor Locality.
  • Effect of Improving Locality.

Shared Image Cost and Benefits

  • Module Outline.
  • Shared Image Costs and Benefits.
  • Image Activation and Paging.
  • Linking Shareable Images.
  • Alpha & I64 Resident Images.
  • Shared Address Data.

The Modified Page List and Modified Page Writing

  • Module Outline.
  • Modified Page List.
  • Modified Page List Parameters and Metrics.
  • Modified Page List Performance Considerations.
  • MPL Performance and Analysis.
  • Page File Exhaustion.
  • Modified Page Writer Parameter Relationships.

The Swapper and Memory Reclamation

  • Module Outline.
  • The Swapper and Memory Reclamation.
  • Free Page List Parameter Relationships.

General I/O Flow

  • Module Outline.
  • General I/O Flow.
  • Geometry of Disks.
  • Time-Based Components of a Disk Transfer.
  • Optimization of Disk Operations.
  • Virtual I/O Cache.
  • Extended File Cache (XFC).
  • XFC SYSGEN Parameters.
  • Permanent vs. Dynamic XFC Cache Size.
  • Monitoring the XFC.
  • SHOW MEMORY/CACHE.
  • Monitoring Volume Activity.
  • Monitoring File Activity.
  • Cache Control.
  • Resetting Cache Counters.

Analyzing the Effects of Fragmentation

  • Module Outline.
  • Determining I/O Rates.
  • Dump of Header for X.Dat.
  • Effect of Making File Contiguous.
  • Effect of Making Both Files Contiguous.
  • Using Multiple Spindles.

Controller Optimizations

  • Module Outline.
  • Controller Optimizations.
  • Locating Bottlenecks.
  • Other Optimizatons Through Layered Products.
  • RAID.

Files-11 ODS-2 Concepts

  • Module Outline.
  • Files-11 Terminology.
  • Directory Concepts.
  • File Open Operation.

Contiguity and the File System

  • Module Outline.
  • Contiguity and the File System.
  • Window Turns.
  • Preventing Fragmentation.
  • Split Transfers.
  • Window Turns Versus Split Transfers.
  • Accessing Sequential Files.
  • Accessing Files Randomly.

File System Caches

  • Module Outline.
  • File System Caches.
  • $MONITOR File.
  • Shared and Private Caches.
  • Checking for Shrunken Caches.

RMS Structures and Design Considerations

  • Module Outline.
  • RMS File Concepts.
  • Summary of RMS File Organizations.
  • File Structures.
  • Indexed File Organization for a File with No Alternate Keys.
  • RMS Interfaces for Affecting File Structure.
  • Bucket Splits.
  • Indexed File Growth.
  • Factors Affecting Bucket Splits.
  • Duplicate Keys for Data Records.
  • Compression.

RMS Utilities

  • Module Outline.
  • File Definition Language.
  • Techniques for Creating Data Files Using an FDL File.
  • Creating a Data File from an FDL File.
  • Optimizing RMS Indexed Files.
  • Examining File Structures.
  • Example Using RMS Utilities to Tune an Indexed File Structure.
  • Example Testing Random Access of Indexed Files.

RMS I/O Buffering Considerations

  • Module Outline.
  • Buffers and Buckets.
  • Design Considerations.
  • Multiblock Count Example.
  • Read Ahead/Write Behind.
  • Deferred Write.
  • Setting Up Multiple Buffers.
  • Determining the Number of Local Buffers.
  • Global Buffers.

Monitor RMS

  • Module Outline.
  • MONITOR RMS.
  • MONITOR RMS Example.

Understanding CPU Performance

  • Module Outline.
  • CISC vs. RISC Architectures.
  • Understanding CPU Performance.
  • VAX Alignment Considerations Example.
  • Data Alignment Issues.
  • Nonaligned Data Example.
  • Nonaligned and Compiler Aligned Data Sample Runs.
  • Aligned Data Example.
  • Badly Aligned Macro Example.
  • Well Aligned Macro Example.
  • C Code with Bad Alignment.
  • C Small Data Accesses Issues.
  • C Code with Good Alignment.
  • Debugger Issues.
  • Using the Break/Unaligned Debugger Option.
  • CPU Performance and Symmetric Multiprocessing.
  • Galaxy Performance Options.
  • Galaxy Computing Model.
  • Galaxy Shared Everything Model.
  • CPU Migration Under Galaxy.
  • Sample CPU Migration Using DCL.
  • CPU Controls Using DCL.

Understanding Time Spent in Modes

  • Module Outline.
  • OpenVMS Access Modes.
  • Interrupt Stack/State Time.
  • MONITOR TIMER.
  • Sample $MONITOR TIMER.
  • Impact of High Timer Service Rate.
  • MP Synchronization Time.
  • Dedicated CPU Lock Manager.
  • Dedicated CPU Lock Manager Interaction.
  • Dedicated CPU Lock Manager Examples.
  • Impact of the Dedicated CPU Lock Manager.
  • Dedicated CPU Lock Manager Litmus Test.
  • Idle Time.
  • Examining Time Spent in Access Modes.
  • Compatibility Mode Time.
  • Analyzing Time Spent in Modes.

OpenVMS Scheduling and Priorities

  • Module Outline.
  • Quantum and CPU Time.
  • Priorities.
  • Waiting States.
  • States of Concern.
  • Class Scheduler.
  • Class Scheduler Example.

PIXSCAN and DORMANTWAIT
Locking Concepts

  • Module Outline.
  • Locking Concepts.
  • Other Characteristics of Locks.
  • Application Design and Locking Performance.
  • Locking Considerations.
  • Record Options in RAB for Locking Shared Files.
  • Sample $MONITOR LOCK/Local Buffers.
  • $MONITOR LOCK Display (Global Buffers).
  • Interpreting the $MONITOR LOCK Display.
  • Lock Manager Parameters.
  • Global Buffers.
  • Global Buffer Read-mode Bucket Locking.
  • RMS Contention Policies.
  • Setting RMS Contention Policies.
  • No Query Locking.

Distributed Locking Concepts

  • Module Outline.
  • Distributed Locking Concepts.
  • LOCKDIRWT and PE1.
  • PE1 Processing.
  • MONITOR RLOCK.
  • Sample $MONITOR RLOCK.
  • Lock Tree Inbound Example.
  • Higher Activity Example.
  • Higher LOCKDIRWT Example.
  • Performance Issues with Distributed Locking.
  • Distributed Locking Example.

The MSCP Server

  • Module Outline.
  • MSCP Server.
  • Interpreting $MONITOR MSCP.

U3727Sc.00
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