You can configure thresholds on various attributes. The instant
alerts and notifications help you in taking quick corrective
actions though e-mail, SMS, traps and executing custom scripts
& MBean Operations.
Apart from Availability and response time, Java Runtime monitor
tracks the following attributes
| 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 |
| 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. |
