Troubleshooting response time problems – why you cannot trust your system metrics

Production Monitoring is about ensuring the stability and health of our system, that also includes the application. A lot of times we encounter production systems that concentrate on System Monitoring, under the assumption that a stable system leads to stable and healthy applications. So let’s see what System Monitoring can tell us about our Application.

Let’s take a very simple two tier Web Application:

 

This is a simple multi-tier eCommerce solution. Users are concerned about bad performance when they do a search. Let's see what we can find out about it if performance is not satisfactory. We start by looking at a couple of simple metrics.

CPU Utilization

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