visualvm history graph

Question

Is it possible in visual vm to set memory, process/gc activity etc. graphs to shift in time without lowering x scale? When application starts that graphs look nice, but after some time they toughly compressed along x axis and it becomes cumbersome to see what actually happens in application.

Tormentor

Answer 1

You can do several things:

1. Go to tools>options and change 'Monitored Host' and/or 'Monitored Data' to something smaller than default 60 minutes. 60 minutes mean that the graph will remember data for last 60 minutes.
2. You can close other tabs ('Heap', 'Classes', 'Threads') to make a graph bigger.
3. You can use Tracer Framework to display your data. Tracer framework allows you to zoom-in zoom-out collected data.

[NOTE: This answer was last updated in January 2016 to reflect changes in JVisualVM.]

Yusem

I changed the Chart Cache to 20 minutes but I still see 60 minutes in the graphs. is there anything else to do there besides clicking OK on the Options dialog box? – Coprophilia

looks like a restart of VisualVM is required for that change to take effect. +1 for the Tracer Plugin. – Coprophilia

Answer 2

From VisualVM version 1.3 is Tracer framework accessibility in the plugins manager.

Tools->Plugins tab Available Plugins name Tracer-Monitor Probes

VisualVM v1.3 news

Zebe