Exposes runtime data about the JRockit Virtual Machine (VM) that is running the current WebLogic Server instance. You cannot change the VM's operating parameters while the VM is active. Instead, use the startup options that are described in the JRockit documentation.
The WebLogic JVM contains only one of these Runtime MBeans:
If the JVM is an instance of a JRockit JDK, then the JVM
contains JRockitRuntime MBean.
Otherwise, it contains the JVMRuntimeMBean.
| Fully Qualified Interface Name | If you use the getMBeanInfo operation in MBeanTypeServiceMBean, supply the following value as this MBean's fully qualified interface name:weblogic.management.runtime.JRockitRuntimeMBean
|
||
| Factory Methods | No factory methods. Instances of this MBean are created automatically. | ||
| Access Points Inherited from JVMRuntimeMBean |
Because this MBean extends or implements JVMRuntimeMBean, you can also access this MBean by retrieving JVMRuntimeMBeans. The following attributes contain JVMRuntimeMBeans and its subtypes:
|
||
| Access Points Inherited from RuntimeMBean |
Because this MBean extends or implements RuntimeMBean, you can also access this MBean by retrieving RuntimeMBeans. The following attributes contain RuntimeMBeans and its subtypes:
|
This section describes the following attributes:
A snapshot of the average load of all processors in the host
computer. If the computer has only one processor, this method
returns the same value as getJvmProcessorLoad(0).
The value is returned as a double, where 1.0 represents 100% load (no idle time) and 0.0 represents 0% load (pure idle time).
| Privileges | Read only |
| Type | double |
Private property that disables caching in proxies.
| Privileges | Read only |
| Type | boolean |
Indicates whether the VM's garbage collector runs in a separate Java thread concurrently with other Java threads.
| Privileges | Read only |
| Type | boolean |
The amount (in bytes) of Java heap memory that is currently free in the Virtual Machine.
| Privileges | Read only |
| Type | long |
The amount (in bytes) of physical memory that is currently free on the host computer.
| Privileges | Read only |
| Type | long |
The type of garbage collector (GC) that the Virtual Machine is using.
JRockit provides the following types of GCs:
Generational Copying, which is suitable for testing applications on a desktop machine with a small (less then 128 MB) heap.
Single Spaced Concurrent, which reduces or eliminates pauses in the VM that are due to garbage collection. Because it trades memory throughput for reduced pause time, you generally need a larger heap size than with other GC types. If your ordinary Java threads create more garbage than this GC can collect, the VM will pause while the Java threads wait for the garbage collection to finish.
Generational Concurrent, which creates a "nursery" space within the heap. New objects are created within the nursery. When the nursery is full, JRockit "stops-the-world," removes the dead objects from the nursery, and moves live objects to a different space within the heap. Another thread runs in the background to remove dead objects from the non-nursery space. This GC type has a higher memory throughput than a single spaced concurrent GC.
Parallel, which allocates all objects to a single spaced heap. When the heap is full, all Java threads are stopped and every CPU is used to perform a complete garbage collection of the entire heap. This behavior causes longer pause times than for the concurrent collectors but maximizes memory throughput.
| Privileges | Read only |
| Type | java.lang.String |
Indicates whether the VM's garbage collector compacts the Java heap.
Usually the heap is scattered throughout available memory. A garbage collector that compacts the heap defragments the memory space in addition to deleting unused objects.
| Privileges | Read only |
| Type | boolean |
Indicates whether the VM's garbage collector uses a nursery space.
A nursery is the area of the Java heap that the VM allocates to most objects. Instead of garbage collecting the entire heap, generational garbage collectors focus on the nursery. Because most objects die young, most of the time it is sufficient to garbage collect only the nursery and not the entire heap.
| Privileges | Read only |
| Type | boolean |
The current amount of memory (in bytes) that is available in the JVM heap.
| Privileges | Read only |
| Type | long |
Percentage of the maximum memory that is free.
| Privileges | Read only |
| Type | int |
The current size (in bytes) of the JVM heap.
| Privileges | Read only |
| Type | long |
The maximum free memory configured for this JVM.
| Privileges | Read only |
| Type | long |
Indicates whether the VM's garbage collector collects (increments) garbage as it scans the memory space and dumps the garbage at the end of its cycle.
With a non-incremental garbage collector, garbage is dumped as soon as it is encountered.
| Privileges | Read only |
| Type | boolean |
Returns the vendor of Java.
The vendor of Java that this server runs.
| Privileges | Read only |
| Type | java.lang.String |
The Java version of the JVM.
| Privileges | Read only |
| Type | java.lang.String |
Returns the vendor of the JVM.
The vendor of the JVM that this server runs.
system property java.vm.vendor is returned
| Privileges | Read only |
| Type | java.lang.String |
A description of the Java Virtual Machine. For example, "BEA WebLogic JRockit Java Virtual Machine."
| Privileges | Read only |
| Type | java.lang.String |
A snapshot of the load that the Virtual Machine is placing on all processors in the host computer. If the host contains multiple processors, the value represents a snapshot of the average load.
The value is returned as a double, where 1.0 represents 100% load (no idle time) and 0.0 represents 0% load (pure idle time).
| Privileges | Read only |
| Type | double |
The time at which the last garbage collection run ended.
| Privileges | Read only |
| Type | long |
The time at which the last garbage collection run started.
| Privileges | Read only |
| Type | long |
Returns the MBean info for this MBean.
Deprecated.
| Privileges | Read only |
| Type | javax.management.MBeanInfo |
The name of the Java Virtual Machine. For example, "WebLogic JRockit."
| Privileges | Read only |
| Type | java.lang.String |
The number of daemon Java threads currently running in the Virtual Machine across all processors.
| Privileges | Read only |
| Type | int |
The number of processors on the Virtual Machine's host computer.
If this is not a Symmetric Multi Processor (SMP) system, the value
will be 1.
| Privileges | Read only |
| Type | int |
Returns the ObjectName under which this MBean is registered in the MBean server.
Deprecated.
| Privileges | Read only |
| Type | weblogic.management.WebLogicObjectName |
Returns the operating system on which the JVM is running.
The operating system on which the JVM is running.
| Privileges | Read only |
| Type | java.lang.String |
The version of the operating system on which the JVM is running.
| Privileges | Read only |
| Type | java.lang.String |
Indicates whether the VM's garbage collector is able to run in parallel on multiple processors if multiple processors are available.
| Privileges | Read only |
| Type | boolean |
Return the immediate parent for this MBean
| Privileges | Read/Write |
| Type |
Returns false if the MBean represented by this object has been unregistered.
Deprecated.
| Privileges | Read only |
| Type | boolean |
JVM thread dump. Thread dump is available only on 1.5 VM
| Privileges | Read only |
| Type | java.lang.String |
The number of garbage collection runs that have occurred since the Virtual Machine was started.
| Privileges | Read only |
| Type | long |
The number of milliseconds that the Virtual Machine has spent on all garbage collection runs since the VM was started.
| Privileges | Read only |
| Type | long |
The amount (in bytes) of memory currently allocated to the Virtual Machine's Java heap.
This value, which is also known as the "heap size," may grow up to the specified maximum heap size.
For more information, see:
| Privileges | Read only |
| Type | long |
The number of Java threads (daemon and non-daemon) that are currently running in the Virtual Machine across all processors.
| Privileges | Read only |
| Type | int |
The amount (in bytes) of memory that is currently allocated to the nursery.
The nursery is the area of the Java heap that the VM allocates to most objects. Instead of garbage collecting the entire heap, generational garbage collectors focus on the nursery. Because most objects die young, most of the time it is sufficient to garbage collect only the nursery and not the entire heap.
If you are not using a generational garbage collector, the
nursery size is 0
| Privileges | Read only |
| Type | long |
The amount (in bytes) of physical memory on the host computer.
The value does not include memory that an operating system makes available through swap space on a disk or other types of virtual memory.
| Privileges | Read only |
| Type | long |
Returns the type of the MBean.
| Privileges | Read only |
| Type | java.lang.String |
The number of milliseconds that the Virtual Machine has been running.
| Privileges | Read only |
| Type | long |
The amount (in bytes) of Java heap memory that is currently being used by the Virtual Machine.
| Privileges | Read only |
| Type | long |
The amount (in bytes) of physical memory that is currently being used on the host computer.
The value describes the memory that is being used by all processes on the computer, not just by the Virtual Machine.
| Privileges | Read only |
| Type | long |
The name of the JVM vendor.
| Privileges | Read only |
| Type | java.lang.String |
The current version of Java Virtual Machine.
| Privileges | Read only |
| Type | java.lang.String |
This section describes the following operations:
The number of times a constructor has been invoked since enabling invocation counting.
Deprecated.
| Operation Name | "getConstructorInvocationCount" |
| Parameters | Object [] { constructor }
where:
|
| Signature | String [] {
"java.lang.reflect.Constructor" } |
| Returns |
long
|
| Exceptions |
|
The amount of time (in milliseconds) the Virtual Machine has spent in the constructor since enabling time measuring.
If time measuring hasn't been enabled for the specified constructor, this method returns a null value.
Deprecated.
| Operation Name | "getConstructorTiming" |
| Parameters | Object [] { constructor }
where:
|
| Signature | String [] {
"java.lang.reflect.Constructor" } |
| Returns |
long
|
| Exceptions |
|
The number of times an exception type has been thrown since enabling exception counting. If exception counting has not been enabled for the specified type, the result is unspecified.
Deprecated.
| Operation Name | "getExceptionCount" |
| Parameters | Object [] { throwableClass }
where:
|
| Signature | String [] {
"java.lang.Class" } |
| Returns |
long
|
The number of times a method has been invoked since enabling invocation counting.
Deprecated.
| Operation Name | "getMethodInvocationCount" |
| Parameters | Object [] { method }
where:
|
| Signature | String [] {
"java.lang.reflect.Method" } |
| Returns |
long
|
| Exceptions |
|
The amount of time (in milliseconds) the Virtual Machine has spent in the method since enabling time measuring.
If time measuring has not been enabled for the specified method, this method returns a null value.
Deprecated.
| Operation Name | "getMethodTiming" |
| Parameters | Object [] { method }
where:
|
| Signature | String [] {
"java.lang.reflect.Method" } |
| Returns |
long
|
| Exceptions |
|
Indicates whether the Virtual Machine counts how many times a constructor is invoked.
Deprecated.
| Operation Name | "isConstructorInvocationCountEnabled" |
| Parameters | Object [] { cons }
where:
|
| Signature | String [] {
"java.lang.reflect.Constructor" } |
| Returns |
boolean
|
| Exceptions |
|
Indicates whether the Virtual Machine measures how much time it spends in a constructor.
Deprecated.
| Operation Name | "isConstructorTimingEnabled" |
| Parameters | Object [] { constructor }
where:
|
| Signature | String [] {
"java.lang.reflect.Constructor" } |
| Returns |
boolean
|
| Exceptions |
|
Indicates whether the Virtual Machine counts how many times an exception is thrown.
Deprecated.
| Operation Name | "isExceptionCountEnabled" |
| Parameters | Object [] { throwableClass }
where:
|
| Signature | String [] {
"java.lang.Class" } |
| Returns |
boolean
|
| Exceptions |
|
Indicates whether the Virtual Machine counts how many times a method is invoked.
Deprecated.
| Operation Name | "isMethodInvocationCountEnabled" |
| Parameters | Object [] { method }
where:
|
| Signature | String [] {
"java.lang.reflect.Method" } |
| Returns |
boolean
|
| Exceptions |
|
Indicates whether the Virtual Machine measures how much time it spends in a method.
Deprecated.
| Operation Name | "isMethodTimingEnabled" |
| Parameters | Object [] { method }
where:
|
| Signature | String [] {
"java.lang.reflect.Method" } |
| Returns |
boolean
|
| Exceptions |
|
| Operation Name | "preDeregister" |
| Parameters | null |
| Signature | null |
| Returns |
void
|
| Exceptions |
|