public interface BufferPoolMXBean extends PlatformManagedObject
direct or mapped buffers.
A class implementing this interface is an
MXBean. A Java
virtual machine has one or more implementations of this interface. The getPlatformMXBeans
method can be used to obtain the list of BufferPoolMXBean objects
representing the management interfaces for pools of buffers as follows:
List<BufferPoolMXBean> pools = ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class);
The management interfaces are also registered with the platform MBeanServer. The ObjectName that uniquely identifies the
management interface within the MBeanServer takes the form:
java.nio:type=BufferPool,name=pool name
where pool name is the name of the buffer pool.| Modifier and Type | Method and Description |
|---|---|
long |
getCount()
Returns an estimate of the number of buffers in the pool.
|
long |
getMemoryUsed()
Returns an estimate of the memory that the Java virtual machine is using
for this buffer pool.
|
String |
getName()
Returns the name representing this buffer pool.
|
long |
getTotalCapacity()
Returns an estimate of the total capacity of the buffers in this pool.
|
getObjectNameString getName()
long getCount()
long getTotalCapacity()
long getMemoryUsed()
capacity of
the buffers in this pool. This difference is explained by alignment,
memory allocator, and other implementation specific reasons.-1L if an estimate of
the memory usage is not available