PlatformManagedObjectpublic 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 | 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. |
getObjectName
String 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
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https://docs.oracle.com/en/java/javase/21/docs/api/java.management/java/lang/management/BufferPoolMXBean.html