This is incorrect but commonly used because of convenience. Some tools do not express the throughput in units per unit of time but in clock periods.Ideally, consistent throughput indicates an expected capacity of network bandwidth.This bottleneck can be rectified by adding extra channels i.e. Increase in response time with flat throughput graph shows a network bandwidth issue.If throughput is nearly equal to bandwidth, it means the full capacity of the network is being utilized which may lead network bandwidth issue.Solving bandwidth is easier than solving latency.For more information on response time refer to the link. In the Latency example, Response time will be 4 seconds. Response time is the amount of time from the moment that a user sends a request until the time that the application indicates that the request has completed and reaches back to the user. Remember: Data Throughput can never be more than Network Bandwidth. Let’s say, 20bits data transferred at t=4 th second, so throughput at t=4 is 20bps. It is typically measured in bits per second (bps), as in megabits per second (Mbps) or gigabits per second (Gbps). In performance testing term ‘ The amount of data moved successfully from one place to another in a given time period is called Data Throughput‘. The water is flowing from the pipe can be represented as ‘Throughput’. Let’s say an ISDN having 64Kbps of bandwidth and we can increase it by adding one more 64Kbps channel, so total bandwidth will be 128Kbps, so maximum 128Kbps data can be transferred through ISDN channel. In performance testing term the maximum amount of data that can be transferred per unit of time through a communication channel is called channel’s bandwidth. It indicates the maximum water passes through the pipe. Bandwidth:īandwidth shows the capacity of the pipe (communication channel). So, the network latency will be 2.2 seconds (= 1 + 1.2). Reaches to the client end in 1.2 seconds (at t=4).The server takes 2 seconds to process (at t=3).Reaches to a server in 1 second (at t=1).In performance testing, the term latency (or better to called Network Latency) of a request is travel time from client to server and server to the client. It’s measuring units are millisecond, second, minute or hour. The time taken by water to travel from one end to another end is called Latency. If still, it seems confusing then let’s have a detailed discussion on it. Latency, Bandwidth, Throughput and Response Time with this diagram. You will get an idea about all four important terms i.e. The water tank represents a server, pipe represents communication channel with certain width and water represents data. The illustration shows a water tank (Orange), water pipe (Green), water (Blue). This article will help to get the knowledge of Network Latency, Network Bandwidth, Data Throughput and Response Time. A new performance tester faces difficulty to understand these terms without example. Latency, Throughput, Bandwidth and Response Time somehow these terms are very confusing.
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