The JVM tab for Teradata Hadoop master node and data node displays detailed information about heap memory, non-heap memory, and thread counts.
Heap Memory
| Heap Memory | Description |
|---|---|
| Used | Amount of memory currently used to store Java objects |
| Committed | Amount of allocated memory for Java object storage |
| Total | Configured maximum size of Java heap |
Non-Heap Memory
| Non-Heap Memory | Description |
|---|---|
| Used | Amount of memory currently used by Java to store loaded classes and other metadata |
| Committed | Amount of allocated memory for Java loaded classes and other metadata storage |
| Total | Configured maximum size of Java non-heap |
Thread Counts
| Thread Counts | Description |
|---|---|
| New | Amount of threads created but not started |
| Runnable | Amount of threads executing |
| Blocked | Amount of threads waiting for a monitor lock |
| Waiting | Amount of threads waiting indefinitely for another thread to perform an action |
| Timed Waiting | Amount of threads waiting for a specified wait time for another thread to perform an action |
| Terminated | Amount of threads that can no longer execute |