Introduction

APM stands for Application Performance Monitoring. Flowmon APM (“APM”) is used for application monitoring of web applications. It works on the principle of analysis of real application traffic. All communication of users with the monitored application is monitored. Therefore, there is no need to adjust the servers, install agents, or modify the monitored application. APM belongs to the category of Real User Experience Monitoring. It monitors user experience, that is, whether the application works correctly for all users, especially in terms of its performance. You can easily find out how the application performs depending on the number of concurrently working users, what part of the application is the slowest, how the functioning of the application has changed after any changes in the infrastructure, whether the application works identically for all users, and so on. All of this is in real-time.

A list of metrics monitored using APM is as follows:

• APM index – a one-digit expression of application performance (see heading APM index under Chapter Monitoring results).

• Transaction response time (average, median, percentiles)

• Numbers of transactions by response time (up to SLA, 2nd multiple of SLA, 3rd multiple of SLA)

• Total transaction count

• Number of concurrent users

• Number of errors (error return codes)

• Size of data transported

• Network transport time

You can display aggregated metrics for the entire application, for transaction groups, or detailed information about each individual transaction.