OpenVMS Training : Advanced OpenVMS Systems Management

This course is designed to teach performance concepts relating to the OpenVMS system, and to use these concepts to develop a tuning methodology to interpret, monitor, and adjust performance mechanisms in OpenVMS. Practical uses of OpenVMS Internals, such as for crash dump analysis, process / resource issues, and general understanding of OpenVMS mechanisms, will also be shown.

OpenVMS Training Prerequisites

Participants are assumed to have background knowledge of VMS Systems Management (mainly for parameter information), and a working knowledge of DCL programming.

OpenVMS Training Course duration

This course requires five (5) days, 60 % lecture, and 40 % lab time.

OpenVMS Training Course Objectives

Upon completion of this course, a system performance analyst will be able to : understand fundamental performance concepts for memory management, CPU management, and I/O management in an OpenVMS system. The ability to use supplied monitors to interpret performance statistics is also included. Participants will also be able to do brief analysis of a systems crash, determine the reason for a process' MWAIT condition, and learn to use the System Dump Analyzer (SDA) utility.

OpenVMS Training Course outline

PERFORMANCE

   Performance Basics

    Factors affecting system performance
    Performance metrics
    Virtual system caching

   Memory Management in OpenVMS

    Memory layout in OpenVMS
    Process and balance slots
    Free and modified page lists
    Working set adjustment algorithms
    SWAPPER trimming
    Page and swapfile usage

   CPU Management in OpenVMS

    Software and hardware priorities concepts
    Scheduling in uni- and multi- CPU configurations
    Priority boosting
    Lock manager CPU use

   I/O Management in OpenVMS

    Buffered and direct I/O definitions
    Breakdown of disk I/O
    Measuring Disk and terminal I/O
    File system structure concepts
    File system caching

   VMScluster Performance Management in OpenVMS

    Additional software components in the VMScluster
    Cluster common system disks

    Distributed lock manager
    MSCP buffering

   Performance Modification Tools: MONITOR

    Overview of available tools

   Modification of Parameters

    SYSGEN
    AUTOGEN

   Performance Considerations/Modifications in:

    Memory management
    CPU management
    I/O management
    VMScluster management

PRACTICAL INTERNALS

   Naming conventions used in the VMS executive

    System space locations
    VMS internal routines
    Data structure layouts and offset names
    Accessing VMS executive locations in DCL procedures

   Internals of the process

    P0 address space
    P1 address space
    Uses of P2 address space
    Process control block / Kernel thread block
    Process header
    Hardware process control block
    Job information block

   Systems components overview

    S0 /S1 / S2 address spaces
    Timer mechanisms
    SWAPPER, ERRFMT, OPCOM, and JOB_CONTROL processes
    Process creation

   System mechanisms

    Interrupt priority levels
    Interrupt handling
    Exception handling
    ASTs (Asynchronous system traps)
    Non-paged dynamic memory layout
    Mutexes and MWAIT states

   Analyzing system crashes (caused by software)

    SDA utility features
    Requirements to run SDA
    Bugcheck mechanism
    Bugcheck parameters
    Sample crash dump analysis (2)
    Using CLUE to analyze crash dump information

   Using the DELTA Debugger

   Scheduling

    Overview of scheduling states
    Scheduling states transitions
    MWAIT state
    Analyzing processes in MWAIT states

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