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3.9.3. JMX - VM Memory System Service
Overview
Table 3.2221. Overview
| Description: | The memory system of the Java virtual machine including both the heap and non-heap memory. |
| Singleton: | yes |
| Plugin: | JMX |
Child Resource Types
Connection Properties
Table 3.2222.
| Name | Description | Required | Internal Name |
|---|---|---|---|
| Object Name | yes | objectName | |
| Name Template | yes | nameTemplate |
Note
You must use the internal name to reference Configuration Properties in Dynamic Group Definition expressions.
Metrics
Table 3.2223. Metrics
| Name | Type | Description | Internal Name |
|---|---|---|---|
| Heap Usage | measurement | Current heap memory usage | {HeapMemoryUsage.used} |
| Heap Usage Percentage | measurement | Current heap memory usage as percentage of committed heap | Calculated.HeapUsagePercentage |
| Heap Committed | measurement | Current heap memory allocated. This amount of memory is guaranteed for the Java virtual machine to use | {HeapMemoryUsage.committed} |
| Non-Heap Usage | measurement | Current memory usage outside the heap | {NonHeapMemoryUsage.used} |
| Non-Heap Committed | measurement | Current memory allocated outside the heap. This amount of memory is guaranteed for the Java virtual machine to use | {NonHeapMemoryUsage.committed} |
| Objects Pending Finalization | measurement | The approximate number of objects for which finalization is pending. | ObjectPendingFinalizationCount |
| Heap Initial Size | trait | The amount of heap that the Java virtual machine initially requests from the operating system | {HeapMemoryUsage.init} |
| Heap Maximum Size | trait | Maximum amount of heap that can be used for memory management. This amount of memory is not guaranteed to be available if it is greater than the amount of committed memory. The Java virtual machine may fail to allocate memory even if the amount of used memory does not exceed this maximum size. | {HeapMemoryUsage.max} |
| Non-Heap Initial Size | trait | The amount of non-heap memory that the Java virtual machine initially requests from the operating system | {NonHeapMemoryUsage.init} |
| Non-Heap Maximum Size | trait | Maximum amount of non-heap memory that can be used for memory management. This amount of memory is not guaranteed to be available if it is greater than the amount of committed memory. The Java virtual machine may fail to allocate memory even if the amount of used memory does not exceed this maximum size. | {NonHeapMemoryUsage.max} |
Note
You must use the internal name to reference Traits in Dynamic Group Definition expressions.
Configuration Properties
Table 3.2224.
| Name | Description | Required | Internal Name |
|---|---|---|---|
| Verbose | Output verbose information to the output stream to regarding Memory. Typically, a Java virtual machine implementation prints a message when it frees memory through garbage collection. | yes | Verbose |
Note
You must use the internal name to reference Configuration Properties in Dynamic Group Definition expressions.
Operations
Table 3.2225. Metrics
| Name | Description |
|---|---|
| Run Garbage Collection | Runs the garbage collector. |
Package Types
none
3.9.3.1. JMX - Memory Pool Service
Overview
Table 3.2226. Overview
| Description: | A memory pool represents the memory resource managed by the Java virtual machine and is managed by one or more memory managers. |
| Singleton: | no |
| Plugin: | JMX |
Child Resource Types
none
Connection Properties
Table 3.2227.
| Name | Description | Required | Internal Name |
|---|---|---|---|
| Object Name | yes | objectName | |
| Name Template | yes | nameTemplate | |
| Description Template | yes | descriptionTemplate | |
| Name | The memory pool's name | yes | name |
Note
You must use the internal name to reference Configuration Properties in Dynamic Group Definition expressions.
Metrics
Table 3.2228. Metrics
| Name | Type | Description | Internal Name |
|---|---|---|---|
| Used | measurement | Current memory usage | {Usage.used} |
| Committed | measurement | Current memory allocated | {Usage.committed} |
| Initial Size | trait | The amount of memory that the Java virtual machine initially requests from the operating system | {Usage.init} |
| Maximum Size | trait | Maximum amount of memory that can be used for memory management. This amount of memory is not guaranteed to be available if it is greater than the amount of committed memory. The Java virtual machine may fail to allocate memory even if the amount of used memory does not exceed this maximum size. | {Usage.max} |
| Memory Manager Names | trait | Garbage collectors for this space | MemoryManagerNames |
| Type | trait | Pool location | Type |
Note
You must use the internal name to reference Traits in Dynamic Group Definition expressions.
Configuration Properties
none
Operations
none
Package Types
none
