org.garret.perst
Class MemoryUsage

java.lang.Object
  org.garret.perst.MemoryUsage

public class MemoryUsage

extends java.lang.Object

Information about memory usage for the correspondent class. Instances of this class are created by Storage.getMemoryDump method. Size of internal database structures (object index, memory allocation bitmap) is associated with Storage class. Size of class descriptors - with java.lang.Class class.

Field Summary

long	allocatedSize Real allocated size of all instances.
java.lang.Class	cls Class of persistent object or Storage for database internal data
int	nInstances Number of reachable instance of the particular class in the database.
long	totalSize Total size of all reachable instances

Constructor Summary

MemoryUsage(java.lang.Class cls)
MemoryUsage constructor

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

allocatedSize

public long allocatedSize

Real allocated size of all instances. Database allocates space for th objects using quantums, for example object wilth size 25 bytes will use 32 bytes in the storage. In item associated with Storage class this field contains size of all allocated space in the database (marked as used in bitmap)

cls

public java.lang.Class cls

Class of persistent object or Storage for database internal data

nInstances

public int nInstances

Number of reachable instance of the particular class in the database.

totalSize

public long totalSize

Total size of all reachable instances

Constructor Detail

MemoryUsage

public MemoryUsage(java.lang.Class cls)

MemoryUsage constructor