Network configuration is a primary factor in the performance of applications and Web systems. A poorly designed network can slow client activity to unacceptable levels. In an application, there are many network segments. A single network segment with poor performance can affect the entire application.
The following diagram shows a typical network. To go from the server machine to the Vuser machine, data must travel over several segments.
To measure network performance, the Network monitor sends packets of data across the network. When a packet returns, the monitor calculates the time it takes for the packet to go to the requested node and return.
The Network Sub-Path Time graph displays the delay from the source machine to each node along the path. The Network Segment Delay graph displays the delay for each segment of the path. The Network Delay Time graph displays the delay for the complete path between the source and destination machines.
Using the Network Monitor graphs, you can determine whether the network is causing a bottleneck. If the problem is network-related, you can locate the problematic segment so that it can be fixed.
In order for Analysis to generate Network monitor graphs, you must activate the Network monitor before executing the load test scenario. In the Network monitor settings, you specify the path you want to monitor. For information about setting up the Network monitor, see Network Delay Monitoring.