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Monitor Response Times

Note: Response-time measurement is not available on PacketShaper ISP models.

To get an overview of response-time statistics for each class that has current RTM data, you can display the Monitor Response Time window. This window indicates each class' total delay threshold, number of transactions, and percent of good transactions, and calculates the average transaction delay and transaction round trip time.

To display the Monitor Response Time window:

1. Click the monitor tab on the navigation bar. The Monitor Traffic window appears.

2. Click the Monitor Response Time link at the top of the window. The Monitor Response Time window appears. show screen

3. Optional: To display only the classes with thresholds set, click the Display field and choose Classes with Thresholds.

PacketWise uses the data collected since you last cleared the statistics. Measurement data is cleared with the clear stats button in the Monitor Response Time window or when you reset the unit or the measurement data.

Note: The Monitor Response Time screen lists all classes that have ever had response time data recorded for it. But if a class' matching rules have subsequently been changed in such a way that RTM data is no longer being recorded for the class, PacketWise will not let you set a threshold.

Understanding the Monitor Response Time Window

The Monitor Response Time window contains the following information:

Column	Description
Traffic Class Name	The traffic class being summarized; class names are linked to their response-time windows
Threshold (ms)*	The acceptable response time for the class. To set the total delay threshold, see Set Thresholds. If a dash appears in this column, a network or server delay threshold has been set in the command-line interface. (The browser interface only supports total network delay thresholds.) Note that using the browser interface to make any changes to a class’s RTM settings will clear the network or server delay you set in the CLI.
Transactions Count	The number of transactions for the traffic class since you last cleared the statistics
Transactions Good%	The percent of transactions that completed within the total delay threshold
TCP Conn.*	The number of TCP connections established by the class and used by the transactions that were counted in the summary
Avg. Trans. Delay (ms)	The average time in milliseconds the transactions used. The delays are divided into total, network, and server delays. See also Show Transaction Delays.
Round Trip (ms)	An indicator of transit delay that is independent of data size. Round Trip Time (RTT) is the average number of milliseconds spent in transit when a client and server exchange the SYN (synchronize sequence numbers flag) and its corresponding ACK (acknowledge flag). A transaction involving a large amount of data requires the data to be divided into multiple packets. Whereas a transaction's network delay reflects the total transit time for all required packets, the RTT reflects the time for a single small packet to make its way from client to server and another packet to make the return trip. Use the RTT to determine if a large network delay is due to large transactions or a slow network. If the RTT is much smaller than the network delay, the transactions were large. If the two averages are close, a sluggish network caused the longer network delays. Average RTT figures are tracked on a per-host basis. When a traffic class' transactions reference many hosts, the separate figures are averaged.
Worst Clients & Servers	Links to the Worst Clients or Worst Servers lists, described in List the Worst Clients and Servers. If disabled appears in this column, a network or server delay threshold has been set in the command-line interface. The Worst Clients & Servers feature works with total delay thresholds only.
Graphs	Links to the response-time graphs. See View Response-Time Graphs.

* column not displayed when screen resolution < 1024x768

To reorder the summary's list of classes in ascending or descending order according to a single column's values, click the corresponding column's header.