Reclaimed bytes is the Number of Bytes removed from memory through GC.
To service new incoming requests, your application creates a lot of new objects. Once a request has been serviced, newly created objects are of no use (they are called 'garbage'). A GC event removes this garbage from the heap.
Say suppose your heap size was 300mb. GC event ran, cleared garbage and got the heap size to 100mb. Then reclaimed bytes are 200mb (i.e. 300mb - 100mb) for this GC event. This is what we have plotted in this 'Reclaimed Bytes' graph.
Steps to use a reclaimed bytes graph:
1. In the GCeasy report, You can see the reclaimed bytes graph in the Interactive Graphs section.
2. From the left side, select the reclaimed bytes button such that it will show the corresponding graph. X-axis indicates the time at which the GC event ran. Y-axis indicates the amount of bytes removed from memory by that GC event.
3. Click on legends in the graph to highlight and see the particular event as shown below.
4. If you want to see any one of the events (either young GC or Full GC) you can click either young GC or Full GC below the X axis. It will change as shown below.
5. You can zoom in to see a particular area of the graph. Here is the video that explains how to zoom gceasy graphs.
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