Monitoring and Management Interface for the Java Platform

com.sun.management
Interface OperatingSystemMXBean

All Superinterfaces:
OperatingSystemMXBean
All Known Subinterfaces:
UnixOperatingSystemMXBean

public interface OperatingSystemMXBean
extends OperatingSystemMXBean

Platform-specific management interface for the operating system on which the Java virtual machine is running.

The OperatingSystemMXBean object returned by ManagementFactory.getOperatingSystemMXBean() is an instance of the implementation class of this interface or UnixOperatingSystemMXBean interface depending on its underlying operating system.

Since:
1.5

Method Summary
 long getCommittedVirtualMemorySize()
          Returns the amount of virtual memory that is guaranteed to be available to the running process in bytes, or -1 if this operation is not supported.
 long getFreePhysicalMemorySize()
          Returns the amount of free physical memory in bytes.
 long getFreeSwapSpaceSize()
          Returns the amount of free swap space in bytes.
 long getProcessCpuTime()
          Returns the CPU time used by the process on which the Java virtual machine is running in nanoseconds.
 long getTotalPhysicalMemorySize()
          Returns the total amount of physical memory in bytes.
 long getTotalSwapSpaceSize()
          Returns the total amount of swap space in bytes.
 
Methods inherited from interface java.lang.management.OperatingSystemMXBean
getArch, getAvailableProcessors, getName, getSystemLoadAverage, getVersion
 

Method Detail

getCommittedVirtualMemorySize

long getCommittedVirtualMemorySize()
Returns the amount of virtual memory that is guaranteed to be available to the running process in bytes, or -1 if this operation is not supported.

Returns:
the amount of virtual memory that is guaranteed to be available to the running process in bytes, or -1 if this operation is not supported.

getTotalSwapSpaceSize

long getTotalSwapSpaceSize()
Returns the total amount of swap space in bytes.

Returns:
the total amount of swap space in bytes.

getFreeSwapSpaceSize

long getFreeSwapSpaceSize()
Returns the amount of free swap space in bytes.

Returns:
the amount of free swap space in bytes.

getProcessCpuTime

long getProcessCpuTime()
Returns the CPU time used by the process on which the Java virtual machine is running in nanoseconds. The returned value is of nanoseconds precision but not necessarily nanoseconds accuracy. This method returns -1 if the the platform does not support this operation.

Returns:
the CPU time used by the process in nanoseconds, or -1 if this operation is not supported.

getFreePhysicalMemorySize

long getFreePhysicalMemorySize()
Returns the amount of free physical memory in bytes.

Returns:
the amount of free physical memory in bytes.

getTotalPhysicalMemorySize

long getTotalPhysicalMemorySize()
Returns the total amount of physical memory in bytes.

Returns:
the total amount of physical memory in bytes.

Monitoring and Management Interface for the Java Platform

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