Monitor Total Heap Usage Across Servers

To monitor total heap usage across servers:

1. Click the Heap tab in the left pane.
   The first chart (Total Heap Usage Across Servers) shows you the following metrics:

   • • Heap Size After Garbage Collection: This is the amount of Java heap memory that’s currently being used by the Java Virtual Machine (JVM) after garbage collection has been completed.

     • Heap Usage: This is the total amount of Java heap memory that’s currently being used by the JVM.

     • Maximum Heap Size: This is the amount of memory currently allocated to the JVM heap.

   Figure 3-11 Total Heap Usage Across All Server Chart

   
   
   Description of "Figure 3-11 Total Heap Usage Across All Server Chart"
   
2. From this chart:

   • Monitor the heap usage with relation to the maximum heap size to identify whether the maximum heap size needs to be altered to accommodate an increase in heap usage.

   • View the difference between the heap usage and the heap size after garbage collection to monitor the amount of garbage stored in the JVMs.