| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Total_heap |
The amount of memory currently allocated to the Virtual Machine's Java heap |
MB |
|
| Used_heap |
The amount of Java heap memory that is currently being used by the Virtual Machine |
MB |
If the value of this measure increases consistently, it is indicative of heavy load on the Virtual Machine. |
| Free_heap |
The amount of Java heap memory that is currently free in the Virtual Machine
|
MB |
A very low value of this measure is a cause of concern, as it indicates a heavy utilization of the JVM heap. Consider increasing the JVM heap size under such circumstances.
|
| Total_nursery |
The amount of memory that is currently allocated to the nursery
|
MB |
|
| GC_count |
The number of garbage collection runs that have occurred since the Virtual Machine was started
|
Number |
If GC has run too many times during a short interval, it indicates that the JVM is in the dire need of free heap for normal functioning. Moreover, frequent GC executions could cause application performance to deteriorate. In order to avoid this, it is recommended that you increase the heap size or alter the GC frequency.
|
| GC_time |
The time that the Virtual Machine has spent on all garbage collection runs since the VM was started
|
Secs |
If GC has run too many times during a short interval, it indicates that the JVM is in the dire need of free heap for normal functioning. Moreover, frequent GC executions could cause application performance to deteriorate. In order to avoid this, it is recommended that you increase the heap size or alter the GC frequency.
|
| Total_load |
The percentage of load that the Virutal Machine is placing on all processors in the host computer.
|
Percent |
|
| Percent_heap_used |
The percentage of the total Java heap memory that is currently being used by the Virtual Machine.
|
Percent |
|