| Measurement |
Description |
Measurement Unit |
Interpretation |
| Jvm_pauses |
Indicates the number of times the JVM of this disk suspended i.e., paused the application which may or may not include full garbage collection. |
Number |
A high value for this measure is a cause of concern as this may indicate slowness of the disk. |
| Number_of_threads |
Indicates the total number of threads that are currently in use in the JVM of this disk. |
Number |
Comparing the value of these measures across the disks helps you in identifying the disk that is busy in terms of disk reads and disk writes. |
| Used_heap_size |
Indicates the amount of heap memory that is currently utilized by the JVM of this disk. |
MB |
A low value is desired for this measure. Comparing the value of this measure across the JVM of the disks reveals the JVM of the disk that is more frequently utilized and is in need of additional resources. |
| Free_heap_size |
Indicates the amount of heap memory that is currently available for use on the JVM of this disk. |
MB |
A high value is desired for this measure. |
| Total_heap_size |
Indicates the total amount of heap memory on the JVM of this disk. |
MB |
|
| Heap_usage |
Indicates the percentage of heap memory utilized on the JVM of this disk. |
Percent |
A low value is desired for this measure. Comparing the value of this measure across the JVM of the disks reveals the JVM of the disk that is more frequently utilized and is in need of additional resources. |
| Heap_free |
Indicates the percentage of heap memory that is already utilized on the JVM of this disk. |
Percent |
A high value is desired for this measure. |
| Garbage_collects |
Indicates the number of garbage collection operation was performed on the JVM of this disk. |
Number |
|
| Garbage_collects_time |
Indicates the time taken to perform the garbage collection operation on the JVM of this disk. |
Milliseconds |
Ideally, the value of this measure should be low. This is because, the garbage collection (GC) activity tends to suspend the operations of the application until such time that GC ends. Longer the GC time, longer it would take for the application to resume its functions. To minimize the impact of GC on application performance, it is best to ensure that GC activity does not take too long to complete. |
| Allocated_heap_size |
Indicates the amount of heap memory that was allocated to the JVM of this disk. |
MB |
|