Document revision date: 19 July 1999
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OpenVMS Performance Management


Previous Contents Index

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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