Flame graphs are powerful visualisations of performance profiling data, commonly used to help analyse the CPU usage of complex applications. They were popularised by Brendan Gregg who has a great website explaining all about them.
Where are my logfiles? Before I answer this question let me explain the context. I work in the cloud development world and we have a methodology, which is called the 12 factor-app. One of the 12 factors is Logs and here is how this factor is defined.