Refresh Interval

The way information is displayed is affected by the refresh interval. There are three refresh intervals that determine how data is collected by the host, how often the host counters are cleared, and what is displayed for the real-time data reports on the workstation.

In setting the refresh interval for the workstation, one must determine at what intervals the data has been collected and the counters cleared at the host. For example, if the refresh interval at the host is set at 6 minutes, then the response time average, maximum, and minimum counters are cleared every 6 minutes. During this time, the monitoring frequency is set for 30 seconds; therefore every 30 seconds new data is added to the running averages. The refresh interval at the workstation may be set to 1 minute, providing new data at the workstation every minute. (See the Options Button section in the appendices for more information.) Since the test interval is set at 30 seconds, there are two new test results added into the running averages in every new display at the workstation.

To display meaningful data at the browser, the frequency with which the workstation accesses the host must be a numerical value greater than the intervals set at the host. If the refresh intervals are not set correctly, duplicate information is displayed until the host interval values are reached and the counters cleared. To verify that the workstation values are valid, check with NV4IP Technical Support for the host refresh interval parameters.

The interval at which the Host Monitor collects application and client workload data is set using the monitoring frequency panel for each client or IP address that is monitored. The default interval for application and client workload is 60 seconds. The refresh interval for clearing the counters at the host is set as a parameter to the Host Monitor startup job. New workload data may be added during this interval. The current default is every 60 seconds.

The refresh interval at the workstation controls how often the workstation accesses the host to update the screen display. The workstation interval may be set at any time the real-time graphical display is used.

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