| Process Memory
Parameters |
Description |
| Eden Space (Heap
Memory) |
Pool from which
memory is initially allocated for most objects |
| Survivor Space
(Heap Memory) |
Pool containing
objects that have survived GC of eden space. |
| Tenured Generation
(Heap Memory) |
Pool containing
objects that have existed for some time in the survivor
space. |
| Permanent Generation
(Non-Heap) |
Holds all the
reflective data of the virtual machine itself, such as
class and method objects. With JVMs that use class data
sharing, this generation is divided into read-only and
read-write areas. |
| Code Cache (Non-Heap) |
Memory used
for compilation and storage of native code. |
| Thread Parameters |
| Live Threads |
Number of live
threads currently running |
| Daemon Threads |
Number of daemon
threads currently running |
| Runnable Threads |
A thread executing
in the Java virtual machine is in this state |
| Blocked Threads |
A thread that
is blocked waiting for a monitor lock is in this state |
| Waiting Threads |
A thread that
is waiting indefinitely for another thread to perform
a particular action is in this state. |
| Timed waiting
Threads |
A thread that
is waiting for another thread to perform an action for
up to a specified waiting time is in this state |
| Total threads started |
Total number of threads created and also started since the Java virtual machine started |
| Peak Threads |
Peak live thread count since the Java virtual machine started or peak was reset |
| Deadlocked |
Number of threads that are in deadlock waiting to acquire object monitors |
| You can also use Applications Manager to monitor and analyse thread dump of a Java Application. |
| Virtual Memory
Parameters |
| Classes loaded |
Number of classes
loaded |
| Classes Unloaded |
Number of classes
unloaded |
| GC time |
Time taken to
perform garbage collection |
| Compile time |
Time spent in
just-in-time (JIT) compilation |
| Max file descriptor |
Maximum permissible
open file descriptor. Available only for UNIX. |
| Open file descriptor |
Current count
of open file descriptors. Available only for UNIX. |
| Host Memory Parameters |
| Total Physical Memory |
Total amount of physical memory in Megabytes |
| Free Physical Memory |
The amount of free physical memory in Megabytes |
| Total Swap Space |
Total amount of swap space in Megabytes |
| Committed Virtual Memory |
The amount of virtual memory that is guaranteed to be available to the running process in Megabytes |
| Garbage Collector |
| Time Spent/Min |
Total number of collections that have occurred |
| Collections/Min |
Approximate collection elapsed time in milliseconds |
| Thread Count |
Number of threads used for Garbage Collector |
| Last Start Time |
Start time of this GC |
| Last End Time |
End time of this GC |
| Memory usage before GC |
Memory usage of all memory pools at the beginning of this GC |
| Memory usage after GC |
Memory usage of all memory pools at the end of this GC |
| Configuration |
| Uptime |
The uptime of the Java virtual machine |
| Java Virtual Machine |
The Java virtual machine implementation name |
| Vendor |
The Java virtual machine implementation vendor |
| Process ID |
The process identifier is a number used by some operating system kernels to uniquely identify a process |
| Name |
The name representing the running Java virtual machine |
| VM arguments |
The input arguments passed to the Java virtual machine which does not include the arguments to the main method |
| Class path |
The Java class path that is used by the system class loader to search for class files |
| Library path |
The Java library path |
| Library path |
The boot class path that is used by the bootstrap class loader to search for class files |
| JIT compiler |
The name of the Just-in-time (JIT) compiler |
| Objects Pending for finalization |
The approximate number of objects for which finalization is pending |
| Operating System |
The name of the operating system |
| Architecture |
The operating system architecture |
| Processors |
The number of processors available to the Java virtual machine |
| You can also use Applications Manager to monitor JVM Performance and capacity planning. |
