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Last July I listed the features that APM tools provide. This month, I'm listing the top 5 reasons for using APM:

1. Monitoring and alerting on the health of your system. This part of APM let's you know when a problem is occurring or might occur, and allows you to set service level objectives (SLO) and error budgets which lets you optimize your feature velocity against your system reliability
2. Troubleshooting. Once you can see there is a problem, APM let's you dive in to try and understand the underlying cause that is causing the issue
3. Figuring out capacity, tracking and predicting trends. Capacity translates directly into costs, knowing what you are using, what more you need, what you can eliminate, what you will need in a while, these are all important in saving money
4. Understanding the system. A good APM tool will show you how data and requests flows through your system, helping you to understand what is dependent on what and what components are potential choke points
5. Finding where you can improve the system to reduce errors and increase reliability. APM helps you do architecture reviews because it shows you what is actually happening and the actual layout of your system.

Now on to all the usual newsletter list of links, tips, tools, news and articles below, and as usual I've extracted all the tips into this month's tips page.

A note from this newsletter's sponsor

News

Java performance tuning related news

• JDK Mission Control version 8.0.0 (JMC 8) is now available
• JMC 8 Binary Releases
• Reducing MD5 (and SHA) overheads
• OpenTelemetry Metrics Roadmap

Tools

Java performance tuning related tools.

• JMC 8.0.0 General-Availability Release
• OpenTelemetry Specification v1.0.0, Tracing Edition
• JCStress: Eliminating the Nightmare of Debugging Concurrency Problems - jcstress lets you test for concurrency issues
• JCStress - Java Concurrency Stress tool

Articles

• What we Learned Moving Hundreds of Services into the Cloud (Jack Shirazi/Java2Days)
• Monitoring and Troubleshooting Tools in the JDK (Poonam Parhar/Oracle)
• JMC 8 and Beyond (Marcus Hirt/JChampions Conf)

Jack Shirazi

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