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perfino

Are derived telemetries possible in Perfino, e.g. Heap % Used?

I'm currently evaluating Perfino 3.0. The sparklines on the VMs tab are great, but the JVMs I'm monitoring have widely differing max heap sizes. It would be more useful to have a Used Heap % telemetry shown.

I attempted to create a custom one by extracting MBean values for used heap (in bytes) and max heap (in bytes) but I don't see a way to divide one by the other to show a percentage. Is this possible?

Solution

  • If you need to calculate something, you have to add a static method to your code and annotate it with @Telemetry. For example:

    @Telemetry("Heap percentage", @TelemetryFormat(Unit.PERCENT))

    However, your suggestion makes a lot of sense and we'll add a "Used Heap Percentage" VM telemetry in 3.0.1. Please contact support@ej-technologies.com to get a build of 3.0.1. It's already available on the demo server.