HP OpenVMS System Management Utilities Reference Manual

MONITOR SYSTEM

The MONITOR SYSTEM command initiates monitoring of the SYSTEM statistics class, which shows several of the most important items from other classes.

Format

MONITOR SYSTEM

Command Qualifiers

/qualifier[,...]
One or more qualifiers as described in the Command Qualifier Descriptions section.

Classname Qualifiers

/ALL
Specifies that a table of all available statistics (current, average, minimum, and maximum) is to be included in the display and summary output. For summary output, this qualifier is the default for all classes; otherwise, it is the default for all classes except CLUSTER, MODES, PROCESSES, STATES, SYSTEM, and VECTOR.
/AVERAGE
Specifies that a bar graph of average statistics is to be included in the display and summary outputs.
/CURRENT
Specifies that a bar graph of current statistics is to be included in the display and summary outputs. The /CURRENT qualifier is the default for the CLUSTER, MODES, STATES, SYSTEM, and VECTOR classes.
/MAXIMUM
Specifies that a bar graph of maximum statistics is to be included in the display and summary outputs.
/MINIMUM
Specifies that a bar graph of minimum statistics is to be included in the display and summary outputs.

Description

Because the SYSTEM class collects the most significant performance statistics from other classes in a single display, it is particularly useful to system managers and other users seeking a general overview of system activity. The SYSTEM class includes the following data items:
Interrupt Stack (on VAX systems) or Interrupt State (on Alpha and I64 systems)
MP Synchronization
Kernel Mode
Executive Mode
Supervisor Mode
User Mode
Compatibility Mode (meaningful on VAX systems only)
Idle Time
Process Count
Page Fault Rate
Page Read I/O Rate
Free List Size
Modified List Size
Direct I/O Rate
Buffered I/O Rate

The following two display formats are provided, depending on the classname qualifier specified:

A tabular style format for the /ALL qualifier
A bar graph style format for the /AVERAGE, /CURRENT, /MAXIMUM, and /MINIMUM qualifiers

Examples of these formats are at the end of this section. Note that the bar graph version of the SYSTEM class (shown in Example 2) contains the following data, which differs from the tabular version:

All of the CPU processor modes except Idle Time are summarized in the CPU Busy segment.
In the Page Fault segment, the page read I/O rate is indicated by a vertical bar. The bar provides a visual estimate of the proportion of the total page fault rate that caused read I/O operations (the hard fault rate). The hard fault rate appears to the left of the bar.
Four segments show the processes that are currently the top consumers of CPU (since the last screen update), page faults, direct I/Os, and buffered I/Os.

Beginning in OpenVMS Version 7.3, the following rate fields have increased in the MONITOR SYSTEM bar graph screen display:

Rate Name Old Rate New Rate

Page Fault 100 500

Hard Page Fault (vertical line on Page Fault display) 100 500

Direct I/O 60 500

Free List Size Shown in K blocks Shown in K, M, or G blocks (whichever is appropriate)

Mod (modified) List Size 5 digits; K blocks 8 digits; K, M, or G blocks (whichever is appropriate)

Buffered I/O 150 500

Any process that MONITOR designates as a top user process must be swapped in at the beginning and ending of the display interval or at the beginning and ending of the entire period covered by a summary.
When the lower bar graph (top user) and the corresponding upper bar graph (overall system measure) are tracking the same statistic for the same interval (as in Example 2), it is reasonable to compare the two graphs. This will be the case in the following situation:

SYSTEM is the only class being monitored (no other class names have been specified with the MONITOR command).
The CURRENT statistic is specified.
The /INTERVAL and /VIEWING_TIME values are equal.

Otherwise, exercise care in making such comparisons because the top user statistic is always CURRENT, while the overall system measure statistic may be CURRENT, AVERAGE, MAXIMUM, or MINIMUM.
Rates for top users are calculated based on the interval between two successive screen displays, while overall system rates are based on the collection interval. These two interval values can be different whenever one or more classes are being monitored with the SYSTEM class, or when /INTERVAL and /VIEWING_TIME values differ.
While other upper boundary figures for the SYSTEM class bar graphs are constants, the figures for Free List Size and Modified List Size are derived from the physical memory configuration and system parameters of individual systems. The upper boundary figure for the Free List is the number of pages available after deducting the pages permanently allocated to the operating system. This figure, sometimes referred to as balance set memory, is the number of pages that can be allocated to processes, the Free List, and the Modified List. The upper boundary figure for the Modified List is the value of the MPW_HILIMIT system parameter. Note that both upper boundary figures are calculated when the MONITOR request is initiated and do not change thereafter.

Rate Name	Old Rate	New Rate
Page Fault	100	500
Hard Page Fault (vertical line on Page Fault display)	100	500
Direct I/O	60	500
Free List Size	Shown in K blocks	Shown in K, M, or G blocks (whichever is appropriate)
Mod (modified) List Size	5 digits; K blocks	8 digits; K, M, or G blocks (whichever is appropriate)
Buffered I/O	150	500

Examples

MONITOR> MONITOR SYSTEM/ALL

OpenVMS Monitor Utility SYSTEM STATISTICS on node SAMPLE 29-APR-2003 12:43:28 CUR AVE MIN MAX Interrupt Stack 0.33 0.33 0.33 0.33 MP Synchronization 0.00 0.00 0.00 0.00 Kernel Mode 0.16 0.16 0.16 0.16 Executive Mode 0.00 0.00 0.00 0.00 Supervisor Mode 0.00 0.00 0.00 0.00 User Mode 0.50 0.49 0.50 0.50 Compatibility Mode 0.00 0.00 0.00 0.00 Idle Time 99.00 98.67 99.00 99.00 Process Count 14.00 14.00 14.00 14.00 Page Fault Rate 0.33 0.33 0.33 0.33 Page Read I/O Rate 0.00 0.00 0.00 0.00 Free List Size 4255.00 4255.00 4255.00 4255.00 Modified List Size 105.00 105.00 105.00 105.00 Direct I/O Rate 0.00 0.00 0.00 0.00 Buffered I/O Rate 0.16 0.16 0.16 0.16

This example shows the tabular style format for the SYSTEM display.

MONITOR> MONITOR SYSTEM
 
 



  
    
      

       
  
 
  
 
Node: BRS004                OpenVMS Monitor Utility      5-JUN-2003 10:45:32 
Statistic: CURRENT             SYSTEM STATISTICS 
                                                     Process States 
          + CPU Busy (400)          -+         LEF:    15      LEFO:     0 
          |**************************|         HIB:    14      HIBO:     0 
CPU     0 +--------------------------+ 400     COM:     8      COMO:     0 
          |*                         |         PFW:     0      Other:    1 
          +--------------------------+         MWAIT:   0 
          Cur Top: BATCH_27 (6)                          Total: 38 
 
          + Page Fault Rate (1438)  -+         + Free List Size (35173)   + 
          |****|*********************|         |****************          | 54K 
MEMORY  0 +--------------------------+ 500   0 +--------------------------+ 
          |****                      |         |*************             | 5765 
          +--------------------------+         + Mod List Size (3078)     + 
          Cur Top: BATCH_29 (78) 
 
          + Direct I/O Rate (442)   -+         + Buffered I/O Rate (112) -+ 
          |**********************    |         |*****                     | 
I/O     0 +--------------------------+ 500   0 +--------------------------+ 500 
          |*                         |         |                          | 
          +--------------------------+         +--------------------------+ 
          Cur Top: BATCH_24 (23)               Cur Top: BATCH_24 (6)

This example shows the bar graph style format for the SYSTEM display.

MONITOR> MONITOR SYSTEM
 
 



  
    
      

       
  
 
  
 
Node: ADU26B                OpenVMS Monitor Utility     28-SEP-2004 16:05:29 
Statistic: CURRENT             SYSTEM STATISTICS 
                                                     Process States 
          + CPU Busy (0)            -+         LEF:       1    LEFO:       0 
          |                          |         HIB:      20    HIBO:       0 
CPU     0 +--------------------------+ 200     COM:       0    COMO:       0 
          |                          |         PFW:       0    CUR:        1 
          +--------------------------+         MWAIT:     0    Other:      0 
          Cur Top:  (0)                                  Total: 22 
  
          + Page Fault Rate (0)     -+         + Free List Size (98588)   + 
          ||                         |         |*******************       | 128K 
MEMORY  0 +--------------------------+ 500   0 +--------------------------+ 
          |                          |         |                          | 32K 
          +--------------------------+         + Mod List Size (889)      + 
          Cur Top:  (0) 
  
          + Direct I/O Rate (0)     -+         + Buffered I/O Rate (0)   -+ 
          |                          |         |                          | 
I/O     0 +--------------------------+ 500   0 +--------------------------+ 500 
          |                          |         |                          | 
          +--------------------------+         +--------------------------+ 
          Cur Top:  (0)                        Cur Top:  (0)

This example shows format for the SYSTEM display on an I64 system, including a CUR (current) field.

MONITOR TIMER

The MONITOR TIMER command initiates monitoring of the TIMER statistics class, which is the rate of processing Timer Queue Entries (TQEs) by the OpenVMS executive. A TQE is a data structure representing a timer request made by a user or by the system.

Format

MONITOR TIMER

Command Qualifiers

/qualifier[,...]
One or more qualifiers as described in the Command Qualifier Descriptions section.

Classname Qualifiers

/ALL
Specifies that a table of all available statistics (current, average, minimum and maximum) is to be included in the display and summary outputs. For summary output, this qualifier is the default for all classes; otherwise, it is the default for all classes except CLUSTER, MODES, PROCESSES, STATES, SYSTEM, and VECTOR.
/AVERAGE
Specifies that a bar graph of average statistics is to be included in the display and summary outputs.
/CURRENT
Specifies that a bar graph of current statistics is to be included in the display and summary outputs. The /CURRENT qualifier is the default for the CLUSTER, MODES, STATES, SYSTEM, and VECTOR classes.
/MAXIMUM
Specifies that a bar graph of maximum statistics is to be included in the display and summary outputs.
/MINIMUM
Specifies that a bar graph of minimum statistics is to be included in the display and summary outputs.

Description

The TIMER class consists of the following data items, which are displayed as rates of occurrences per second:

Data Item Description

Total TQE Rate Total Rate of TQEs processed per second. This statistic is a combined total of the three following TQE rates.

SYSUB TQE Rate Rate of SYSUB TQEs processed per second. These system subroutine TQEs represent timer requests made by the OpenVMS operating system.

Timer TQE Rate Rate of Timer TQEs processed per second. These TQEs represent timer requests made by users through the $SETIMR system service.

Wakeup TQE Rate Rate of wakeup TQEs processed per second. These TQEs represent timer requests made by users through the $SCHDWK system service.

Data Item	Description
Total TQE Rate	Total Rate of TQEs processed per second. This statistic is a combined total of the three following TQE rates.
SYSUB TQE Rate	Rate of SYSUB TQEs processed per second. These system subroutine TQEs represent timer requests made by the OpenVMS operating system.
Timer TQE Rate	Rate of Timer TQEs processed per second. These TQEs represent timer requests made by users through the $SETIMR system service.
Wakeup TQE Rate	Rate of wakeup TQEs processed per second. These TQEs represent timer requests made by users through the $SCHDWK system service.

Examples

MONITOR> MONITOR TIMER

OpenVMS Monitor Utility TIMER STATISTICS on node EBJB28 6-OCT-2003 08:46:13.84 CUR AVE MIN MAX Total TQE Rate 56.00 56.00 56.00 56.00 SYSUB TQE Rate 51.33 51.33 51.33 51.33 Timer TQE Rate 4.33 4.33 4.33 4.33 Wakeup TQE Rate 0.33 0.33 0.33 0.33

This example shows a relatively low over-all level of TQE processing, most of which has been requested by OpenVMS. Note that the last three rates approximately total the first rate.

MONITOR TRANSACTION

The MONITOR TRANSACTION command initiates monitoring of the TRANSACTION class, which shows information about transactions coordinated by DECdtm services.

Format

MONITOR TRANSACTION

Command Qualifiers

/qualifier[,...]
One or more qualifiers as described in the Command Qualifier Descriptions section.

Classname Qualifiers

/ALL
Specifies that a table of all available statistics (current, average, minimum, and maximum) is to be included in the display and summary output. For summary output, this qualifier is the default for all classes; otherwise, it is the default for all classes except CLUSTER, MODES, PROCESSES, STATES, SYSTEM, and VECTOR.
/AVERAGE
Specifies that a bar graph of average statistics is to be included in the display and summary outputs.
/CURRENT
Specifies that a bar graph of current statistics is to be included in the display and summary outputs. The /CURRENT qualifier is the default for the CLUSTER, MODES, STATES, SYSTEM, and VECTOR classes.
/MAXIMUM
Specifies that a bar graph of maximum statistics is to be included in the display and summary outputs.
/MINIMUM
Specifies that a bar graph of minimum statistics is to be included in the display and summary outputs.

Description

The TRANSACTION class consists of the following data items:

Data Item Description

Start Rate The rate at which new transactions are started on the local node.

Prepare Rate The rate at which transactions on the local node are placed in the Prepared state by DECdtm services.

One-Phase Commit Rate The rate at which transactions on the local node complete using the one-phase commit operation. This operation, which consumes significantly fewer system resources, is used when there is only a single resource manager participating in the transaction.

Total Commit Rate The rate at which transactions on the local node are committed. This value is the combined total of one-phase and two-phase commit transactions.

Abort Rate The rate at which transactions on the local node are aborted.

End Rate The rate at which transactions that were started on the local node are committed.

Remote Start Rate The rate at which transaction branches are started on the local node.

Remote Add Rate The rate at which transaction branches are added on the local node.

Completion Rate The rate at which transactions complete, indexed by their duration in seconds. The following list shows the Completion Rate categories:

Completion Rate 0--1 The number of transactions completed in 0--1 seconds (1 second or less)

Completion Rate 1--2 The number of transactions completed in 1--2 seconds

Completion Rate 2--3 The number of transactions completed in 2--3 seconds

Completion Rate 3--4 The number of transactions completed in 3--4 seconds

Completion Rate 4--5 The number of transactions completed in 4--5 seconds

Completion Rate 5+ The number of transactions that took more than 5 seconds to complete

For example, a transaction that completes in 0.5 second is included in the statistics displayed for the Completion Rate 0--1 category.

Examples

MONITOR> MONITOR TRANSACTION/ALL

OpenVMS Monitor Utility DISTRIBUTED TRANSACTION STATISTICS on node SAMPLE 16-JAN-2003 14:52:34 CUR AVE MIN MAX Start Rate 34.76 34.76 34.76 34.76 Prepare Rate 33.77 33.77 33.77 33.77 One Phase Commit Rate 0.00 0.00 0.00 0.00 Total Commit Rate 35.09 35.09 35.09 35.09 Abort Rate 0.00 0.00 0.00 0.00 End Rate 35.09 35.09 35.09 35.09 Remote Start Rate 31.12 31.12 31.12 31.12 Remote Add Rate 31.45 31.45 31.45 31.45 Completion Rate 0-1 35.09 35.09 35.09 35.09 by Duration 1-2 0.00 0.00 0.00 0.00 in Seconds 2-3 0.00 0.00 0.00 0.00 3-4 0.00 0.00 0.00 0.00 4-5 0.00 0.00 0.00 0.00 5+ 0.00 0.00 0.00 0.00

This example shows the status of all transactions on node SAMPLE.

MONITOR> MONITOR TRANSACTION/MAXIMUM

This example shows the maximum statistics of all transactions on node SAMPLE.

Contents

Index