Package com.sleepycat.je

Class BtreeStats

java.lang.Object

com.sleepycat.je.DatabaseStats

com.sleepycat.je.BtreeStats

All Implemented Interfaces:

java.io.Serializable

public class BtreeStats
extends DatabaseStats

The BtreeStats object is used to return Btree database statistics.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
long[]	getBINEntriesHistogram() Returns an array representing a histogram of the number of Bottom Internal Nodes with various percentages of non-deleted entry counts.
long[]	getBINsByLevel() Returns the count of Bottom Internal Nodes per level, indexed by level.
long	getBottomInternalNodeCount() Returns the number of Bottom Internal Nodes in the database btree.
long[]	getDBINsByLevel() Deprecated. as of 5.0, returns an empty array.
long	getDeletedLeafNodeCount() Returns the number of deleted data records in the database btree that are pending removal by the compressor.
long[]	getDINsByLevel() Deprecated. as of 5.0, returns an empty array.
long	getDupCountLeafNodeCount() Deprecated. as of 5.0, returns zero.
long	getDuplicateBottomInternalNodeCount() Deprecated. as of 5.0, returns zero.
long	getDuplicateInternalNodeCount() Deprecated. as of 5.0, returns zero.
int	getDuplicateTreeMaxDepth() Deprecated. as of 5.0, returns zero.
long[]	getINsByLevel() Returns the count of Internal Nodes per level, indexed by level.
long	getInternalNodeCount() Returns the number of Internal Nodes in the database btree.
long	getLeafNodeCount() Returns the number of leaf nodes in the database tree, which can equal the number of records.
int	getMainTreeMaxDepth() Returns the number of levels in the database btree.
long	getRelatches() Deprecated. as of JE 18.1 and zero is always returned; use EnvironmentStats.getRelatchesRequired() instead.
int	getRootSplits() Deprecated. as of JE 18.1 and zero is always returned; use EnvironmentStats.getRootSplits() instead.
java.lang.String	toString() Returns a String representation of the stats in the form of <stat>=<value>
java.lang.String	toStringVerbose() Returns a String representation of the stats which includes stats descriptions in addition to <stat>=<value>

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

getBottomInternalNodeCount

public long getBottomInternalNodeCount()

Returns the number of Bottom Internal Nodes in the database btree.

getDuplicateBottomInternalNodeCount

public long getDuplicateBottomInternalNodeCount()

Deprecated. as of 5.0, returns zero.

getDeletedLeafNodeCount

public long getDeletedLeafNodeCount()

Returns the number of deleted data records in the database btree that are pending removal by the compressor.

getDupCountLeafNodeCount

public long getDupCountLeafNodeCount()

Deprecated. as of 5.0, returns zero.

getInternalNodeCount

public long getInternalNodeCount()

Returns the number of Internal Nodes in the database btree.

getDuplicateInternalNodeCount

public long getDuplicateInternalNodeCount()

Deprecated. as of 5.0, returns zero.

getLeafNodeCount

public long getLeafNodeCount()

Returns the number of leaf nodes in the database tree, which can equal the number of records. This is calculated without locks or transactions, and therefore is only an accurate count of the current number of records when the database is quiescent.

getMainTreeMaxDepth

public int getMainTreeMaxDepth()

Returns the number of levels in the database btree.

getDuplicateTreeMaxDepth

public int getDuplicateTreeMaxDepth()

Deprecated. as of 5.0, returns zero.

getINsByLevel

public long[] getINsByLevel()

Returns the count of Internal Nodes per level, indexed by level.

Returns:

count of Internal Nodes per level, indexed by level.

getBINsByLevel

public long[] getBINsByLevel()

Returns the count of Bottom Internal Nodes per level, indexed by level.

Returns:

count of Bottom Internal Nodes per level, indexed by level.

getBINEntriesHistogram

public long[] getBINEntriesHistogram()

Returns an array representing a histogram of the number of Bottom Internal Nodes with various percentages of non-deleted entry counts. The array is 10 elements and each element represents a range of 10%.

 element [0]: # BINs with 0% to 9% entries used by non-deleted values
 element [1]: # BINs with 10% to 19% entries used by non-deleted values
 element [2]: # BINs with 20% to 29% entries used by non-deleted values
 ...
 element [0]: # BINs with 90% to 100% entries used by non-deleted values
 

getDINsByLevel

public long[] getDINsByLevel()

Deprecated. as of 5.0, returns an empty array.

getDBINsByLevel

public long[] getDBINsByLevel()

Deprecated. as of 5.0, returns an empty array.

getRelatches

public long getRelatches()

Deprecated. as of JE 18.1 and zero is always returned; use EnvironmentStats.getRelatchesRequired() instead.

getRootSplits

public int getRootSplits()

Deprecated. as of JE 18.1 and zero is always returned; use EnvironmentStats.getRootSplits() instead.

toString

public java.lang.String toString()

Returns a String representation of the stats in the form of <stat>=<value>

Overrides:

toString in class java.lang.Object

toStringVerbose

public java.lang.String toStringVerbose()

Returns a String representation of the stats which includes stats descriptions in addition to <stat>=<value>