Nways Multiprotocol Access Services Software User's Guide Version 3.3

Configuring and Monitoring Performance

This chapter describes how to use the Performance configuration and monitor operating commands and includes the following sections:

• "Performance Overview"
• Performance Reporting Accuracy
• "Accessing the Performance Configuration Environment"
• "Performance Configuration Commands"
• "Accessing the Performance Monitoring Environment"
• "Performance Monitoring Commands"

Performance Overview

Configuring performance allows you to monitor your CPU load. In the idle (non-work load) state, performance reflects operations that the device continuously performs as a part of managing external interfaces. The CPU load registered in the idle state is dependent upon:

• Number of protocols running.

• Number of interfaces/cards installed.

• Type of interfaces installed.

The performance function can be used as a tool for trend analysis, bottleneck evaluation, and capacity planning. By collecting the CPU utilization information on the device, a network manager can monitor:

• CPU load versus time of day.

• CPU load versus location of the device in the network.

• CPU load versus traffic throughput.

• CPU load versus user load (for example: TN3270 sessions, ISDN dial in clients)

Performance Reporting Accuracy

If you request a performance analysis when the 2216 first comes online, you will see values that reflect an initialization state that has little or no network traffic, so it is of little use in helping to balance your network load.

It is best to use performance reports that are generated under normal loads after approximately 2 minutes of operation.

Accessing the Performance Configuration Environment

Use the following procedure to access the Performance monitor configuration process.

1. At the OPCON prompt, enter talk 6. (For more detail on this command, see What is CONFIG?.) For example:

       * talk 6
       Config>
    
   

   After you enter the talk 6 command, the CONFIG prompt (Config>) displays on the terminal. If the prompt does not appear when you first enter configuration, press enter again.

2. At the CONFIG prompt, enter the perf command to get to the PERF Config> prompt.

Performance Configuration Commands

To configure Performance, enter the commands at the PERF Config> prompt.

Table 22. PERF Configuration Command Summary

Command	Function
? (Help)	Displays all the commands available for this command level or lists the options for specific commands (if available). See "Getting Help".
Disable	Disables the collection of CPU utilization statistics or Talk 2 ELS monitor output.
Enable	Enables the collection of CPU utilization statistics or Talk 2 ELS monitor output.
List	Lists the configuration.
Set	Sets the reporting period.
Exit	Returns you to the previous command level. See "Exiting a Lower Level Environment".

Disable

Use the disable command to disable collection of CPU utilization statistics and disable the talk 2 ELS monitor output.

Syntax:

disable

cpu statistics

t2 output

Enable

Use the enable command to enable collection of CPU utilization statistics and enable the talk 2 ELS monitor output.

Syntax:

enable

cpu statistics

t2 output

List

Use the list command to display the performance monitor configuration.

Syntax:

list

Set

Use the set command to set the reporting period.

Syntax:

set

time

time

Specifies the short window time.

Valid Values: 2 - 30 seconds

Default Value: 2

Accessing the Performance Monitoring Environment

Use the following procedure to access the Performance monitoring commands. This process gives you access to the Performance monitoring process.

1. At the OPCON prompt, enter talk 5. (For more detail on this command, see The Operating/Monitoring Process (GWCON - Talk 5) and Commands.) For example:

       * talk 5
       +
   

   After you enter the talk 5 command, the GWCON prompt (+) displays on the terminal. If the prompt does not appear when you first enter configuration, press enter again.

2. At the + prompt, enter the perf command to get you to the PERF Console> prompt.

   Example:

       + perf
       PERF Console>
    
   

Performance Monitoring Commands

This section describes the Performance monitoring commands.

Table 23. PERF Monitoring Command Summary

Command	Function
? (Help)	Displays all the commands available for this command level or lists the options for specific commands (if available). See "Getting Help".
Clear	Clear the CPU utilization high water statistics and resets the reporting period to a new cycle.
Disable	Disables the collection of CPU utilization statistics or Talk 2 ELS monitor output.
Enable	Enables the collection of CPU utilization statistics or Talk 2 ELS monitor output.
List	Lists the configuration.
Report	Displays a report of performance statistics.
Set	Sets the reporting period.
Exit	Returns you to the previous command level. See "Exiting a Lower Level Environment".

Disable

Use the disable command to disable collection of CPU utilization statistics and disable the talk 2 ELS monitor output.

Syntax:

disable

cpu statistics

t2 output

Enable

Use the enable command to enable collection of CPU utilization statistics and enable the talk 2 ELS monitor output.

Syntax:

enable

cpu statistics

t2 output

List

Use the list command to display the performance monitor configuration.

Syntax:

list

Report

Use the report command to display performance monitor statistics.

Syntax:

report

Example:

        PERF Console>report
        --------------------------------------------------------------
        KEY:  SW = Short Window = 9 seconds
        KEY:  LW = Long Window =  9.0 minutes  (60 x SW)
 
          CPU UTIL :   Most recent SW                     = 38%
                       Most recent LW                     = 33%
                       Highest for all SW's               = 92%
                       Highest for all LW's               = 52%
                       % of time cpu util (SW) was > 60%  = 16%
                       % of time cpu util (SW) was > 70%  = 15%
                       % of time cpu util (SW) was > 80%  = 1%
                       % of time cpu util (SW) was > 90%  = 0%
                       % of time cpu util (SW) was > 95%  = 0%
        --------------------------------------------------------------
 

Set

Use the set command to set the reporting period.

Syntax:

set

time

time

Specifies the short window time.

Valid Values: 2 - 30 seconds

Default Value: 2