| Name | Data Type | Default Value | Qualifiers |
| Name | Data Type | Value |
| HeapSize | uint64 | |
| Description | string | The heap size of the JVM. |
| Gauge | boolean | true |
| MappingStrings | string | JSR77.JCP|JSR77.6.31.1.1 getHeapSize|V1.0 |
| PUnit | string | byte |
| Units | string | Bytes |
| HeapSizeHighWaterMark | uint64 | |
| Description | string | The largest size of the JVM heap since the beginning of the measurement. |
| MappingStrings | string | JSR77.JCP|JSR77.6.7.1.1 getHighWaterMark|V1.0 |
| PUnit | string | byte |
| Units | string | Bytes |
| HeapSizeLowerBound | uint64 | |
| Description | string | The lower limit for the heap size of the JVM. |
| MappingStrings | string | JSR77.JCP|JSR77.6.8.1.2 getLowerBound|V1.0 |
| PUnit | string | byte |
| Units | string | Bytes |
| HeapSizeLowWaterMark | uint64 | |
| Description | string | The smallest size of the JVM heap since the beginning of the measurement. |
| MappingStrings | string | JSR77.JCP|JSR77.6.7.1.2 getLowWaterMark|V1.0 |
| PUnit | string | byte |
| Units | string | Bytes |
| HeapSizeUpperBound | uint64 | |
| Description | string | The upper limit for the heap size of the JVM. |
| MappingStrings | string | JSR77.JCP|JSR77.6.8.1.1 getUpperBound|V1.0 |
| PUnit | string | byte |
| Units | string | Bytes |
| UpTime | datetime | |
| Description | string | The amount of time the JVM has been running. The time is represented as a datetime interval. |
| MappingStrings | string | JSR77.JCP|JSR77.6.31.1.2 getUpTime|V1.0 |