Document revision date: 19 July 1999

Chapter 9
9	Evaluating the CPU Resource
9.1	Evaluating CPU Responsiveness
9.1.1	Quantum
9.1.2	CPU Response Time
9.1.3	Determining Optimal Queue Length
9.1.4	Estimating Available CPU Capacity
9.1.5	Types of Scheduling Wait States
9.1.5.1	Voluntary Wait States
9.1.5.2	Involuntary Wait States
9.2	Detecting CPU Limitations
9.2.1	Higher Priority Blocking Processes
9.2.2	Time Slicing Between Processes
9.2.3	Excessive Interrupt State Activity
9.2.4	Disguised Memory Limitation
9.2.5	Operating System Overhead
9.2.6	RMS Misused
9.2.7	CPU at Full Capacity
9.3	MONITOR Statistics for the CPU Resource
Chapter 10
10	Compensating for Resource Limitations
10.1	Changing System Parameters
10.1.1	Guidelines
10.1.2	Using AUTOGEN
10.1.3	When to Use SYSGEN
10.2	Monitoring the Results
Chapter 11
11	Compensating for Memory-Limited Behavior
11.1	Improving Memory Responsiveness
11.1.1	Equitable Memory Sharing
11.1.2	Reduction of Memory Consumption by the System
11.1.2.1	System Working Set
11.1.2.2	Nonpaged Pool
11.1.2.3	Adaptive Pool Management
11.1.2.4	Additional Consistency Checks
11.1.3	Memory Offloading
11.1.4	Memory Load Balancing
11.2	Reduce Number of Image Activations
11.2.1	Programs Versus Command Procedures
11.2.2	Code Sharing
11.2.3	Designing Applications for Native Mode
11.3	Increase Page Cache Size
11.4	Decrease Page Cache Size
11.5	Adjust Working Set Characteristics
11.5.1	Establish Values for Other Processes
11.5.2	Establish Values for Detached Processes or Subprocesses
11.5.3	Establish Values for Batch Jobs
11.6	Tune to Make Borrowing More Effective
11.7	Tune AWSA to Respond Quickly
11.8	Disable Voluntary Decrementing
11.9	Tune Voluntary Decrementing
11.10	Turn on Voluntary Decrementing
11.11	Enable AWSA
11.12	Adjust Swapper Trimming
11.13	Convert to a System That Rarely Swaps
11.14	Adjust BALSETCNT
11.14.1	Reduce BALSETCNT to Reduce Paging
11.14.2	Increase BALSETCNT to Decrease Swapping Problems
11.15	Reduce Large Page Caches
11.16	Suspend Large, Compute-Bound Process
11.17	Control Growth of Large, Compute-Bound Processes
11.18	Enable Swapping for Other Processes
11.19	Reduce Number of Concurrent Processes
11.20	Discourage Working Set Loans
11.21	Increase Swapper Trimming Memory Reclamation
11.22	Reduce Rate of Inswapping
11.23	Induce Paging to Reduce Swapping
11.24	Add Paging Files
11.25	Use RMS Global Buffering
11.26	Reduce Demand or Add Memory
11.26.1	Reduce Demand
11.26.2	Add Memory
Chapter 12
12	Compensating for I/O-Limited Behavior
12.1	Improving Disk I/O Responsiveness
12.1.1	Equitable Disk I/O Sharing
12.1.1.1	Examining Top Direct I/O Processes
12.1.1.2	Using MONITOR Live Mode
12.1.2	Reduction of Disk I/O Consumption by the System
12.1.2.1	Paging I/O Activity
12.1.2.2	Swapping I/O Activity
12.1.2.3	File System (XQP) I/O Activity
12.1.3	Disk I/O Offloading
12.1.4	Disk I/O Load Balancing
12.1.4.1	Moving Disks to Different Channels
12.1.4.2	Moving Files to Other Disks
12.1.4.3	Load Balancing System Files
12.2	Use Virtual I/O Caching
12.2.1	How Does the Cache Work?
12.2.2	Displaying Virtual I/O Cache Statistics
12.2.3	Enabling Virtual I/O Caching
12.2.4	Determining If Virtual I/O Caching Is Enabled
12.2.5	Memory Allocation and the Virtual I/O Cache
12.2.6	Adjusting the Virtual I/O Cache Size
12.2.7	Virtual I/O Cache and OpenVMS Cluster Configurations
12.3	Enlarge Hardware Capacity
12.4	Improve RMS Caching
12.5	Adjust File System Caches
12.6	Use Solid-State Disks

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