Service Monitor
Use the Service Monitor widget to measure response time and throughput over a defined period of time for the services exposed and invoked by your module.
The Service Monitor widget can display graphs
for both response time and throughput so you can compare and correlate
the data. It also displays a table with operation statistics. Both
graphs plot over a defined time window and are regularly updated according
to the specified refresh rate. As new data arrives, the oldest data
is removed from the graph.
- Response Time graph
- Graphs the response time for calls in the selected operation or
operations so you can determine how long the service takes and whether
its duration degrades over time. The Y-axis indicates the response
time, measured in milliseconds. The X-axis indicates the elapsed time
since monitoring began (for example, the window of time
you are monitoring), measured in minutes or hours. You can plot the
minimum, maximum, or mean response times for the specified time unit.
For service operations with a two-way asynchronous service implementation, the response time indicates only the time the operation takes to handle the re quest. It does not measure the total time elapsed before a response is sent.
- Throughput graph
- Graphs the throughput for calls in the selected operation or operations so you can see how often a service is called and whether expected throughput benchmarks are being met. This graph indicates the number of calls completed over a specific period of time (measured in seconds or minutes). The Y-axis shows the number of calls completed per time unit, with the time unit measured in seconds or minutes. The X-axis shows the elapsed time, measured in minutes or hours.
- Statistic Measurements Table
- If you select Show statistics in the widget configuration options, this table provides operation statistics cumulated over the last second or minute and over the duration of service monitoring. The cumulated statistics include the response time, throughput count, and failure count for each monitored operation.
Tips for using the graphs
The following tips can help you use the Response Time and Throughput graphs more effectively.
- Customize the time period and refresh rate for the graphs. You can adjust the refresh rate to increase or decrease the frequency of updates to the graphs; remember that a faster refresh rate can affect performance. You can also specify the length of time for which you want to plot data on the graphs; graph time length is measured in either minutes or hours.
- Restrict the upper limit for the Y-axis. The Y-axis is scalable to optimize graph details; it dynamically adjusts to show the minimum and maximum values since monitoring began. In addition, you can configure an upper limit to restrict the Y-axis further in situations where you have a few response time or throughput values that greatly exceed the rest. In this situation, the graph does not display any measurements greater than the upper limit.
- See exact measurements for a point on a graph. Hover over any point in the Response Time or Throughput graph to see a window with the operation name and specific response time or throughput data.
- Set a threshold for response time and throughput. For each operation you monitor, specify a threshold for the response time, throughput, or both. Calls that exceed the threshold are visually distinguished on the graphs.
- Switch between different graph styles. The Service Monitor widget offers three different graph types for viewing response time and throughput data: Line (the default), Column, and Spike. You can change the graph type for each graph dynamically from the drop-down menu on top the graph.
- Monitor multiple operations on one graph. You can use the graphs to monitor multiple operations at once (for example, to compare the response times for a set of related operations). The Response Time and Throughput graphs can each plot up to five operations.