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.
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