What is most valuable?
Environment Profile Agents. I consider this as a trump card of CA APM. We have written almost 20-30 customized scripts to monitor non-Java/.Net calls. We have incorporated DB queries, shell scripts, curl scripts into EP agents involving business specific metrics.
Agent customization. Writing custom tracers, although tedious, gives a lot of flexibility when it's required to capture business specific information from the method calls. Interesting use case that we have also involved a work around to monitor asynchronous calls using custom tracers which would otherwise be very difficult to trace.
How has it helped my organization?
Using a combination of CEM plugin and EP agents, we were able to derive business specific metrics like day/hour-wise revenue opportunity, day/hour-wise conversion, and failure along with the reason for failure. So basically, a customer is able to identify that since opening of business hours, how much revenue opportunities came to the application, how many got converted, and how many failed, along with the exact amount each opportunity carried. This is also possible using customized agents, but it becomes difficult when these values are part of an object and not direct arguments or return-type method.
What needs improvement?
CA APM has a steep learning curve as compared to other tools like Dynatrace and especially AppDynamics and New Relic, but in return it is very customization friendly. You can capture what is important and leave the rest, but it takes time to identify exactly what is important and what's not.
For how long have I used the solution?
What was my experience with deployment of the solution?
Agents with certain customized applications can increase overhead. This then requires careful analysis and tuning. The probability for this case, though, is 1 in 100.
What do I think about the stability of the solution?
Stability becomes a issue if it's wrongly configured. Defining incorrect business transactions and irregular use of SQL normalization are common causes of instability.
What do I think about the scalability of the solution?
Scalability is, I think, one of the strongest points of CA APM. You can control individual agents and control the infrastructure requirement at micro level. This reduces the chances of over expenditure of resources for the tool.
Which solution did I use previously and why did I switch?
We deployed at a customer site where they were using ITCAM. It was incorrectly implemented, was cumbersome to deploy, and was not that efficient in providing deep-dive diagnostics.
How was the initial setup?
Vanilla setup is easy and quick. It's easy to understand, too. Because it has so many customization options available, services generally end up writing customization. This can be simple to complex, but nothing is too complex here.