This graph shows the number of open TCP/IP connections (y-axis) at each point in time of the load test scenario (x-axis). Depending on the emulated browser type, each Vuser may open several simultaneous connections per web server.
This graph is useful in indicating when additional connections are needed. For example, if the number of connections reaches a plateau, and the transaction response time increases sharply, adding connections would probably cause a dramatic improvement in performance (reduction in the transaction response time).
Elapsed time since the start of the run.
Open TCP/IP connections.