com.sleepycat.je
Class BtreeStats

java.lang.Object
  com.sleepycat.je.DatabaseStats
      com.sleepycat.je.BtreeStats

All Implemented Interfaces:

Serializable

public class BtreeStats
extends DatabaseStats

The BtreeStats object is used to return Btree database statistics.

See Also:

Serialized Form

Constructor Summary

BtreeStats()

Method Summary

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 tree.
long[]	getDBINsByLevel() Deprecated. as of 5.0, returns an empty array.
long	getDeletedLeafNodeCount() Returns the number of deleted data records in the database tree 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 tree.
long	getLeafNodeCount() Returns the number of leaf nodes in the database tree, which can equal the number of records.
int	getMainTreeMaxDepth() Returns the maximum depth of the main database tree.
long	getRelatches() Returns the number of latch upgrades (relatches) required while operating on this database's BTree.
int	getRootSplits() The number of times the root of the BTree was split.
String	toString() For convenience, the BtreeStats class has a toString method that lists all the data fields.
String	toStringVerbose()

Methods inherited from class java.lang.Object

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

Constructor Detail

BtreeStats

public BtreeStats()

Method Detail

getBottomInternalNodeCount

public long getBottomInternalNodeCount()

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

The information is included only if the Database.getStats call was not configured by the StatsConfig.setFast method.

Returns:

number of Bottom Internal Nodes in the database tree.

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 tree that are pending removal by the compressor.

The information is included only if the Database.getStats call was not configured by the StatsConfig.setFast method.

Returns:

number of deleted data records in the database tree 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 tree.

The information is included only if the Database.getStats call was not configured by the StatsConfig.setFast method.

Returns:

number of Internal Nodes in the database tree.

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.

The information is included only if the Database.getStats call was not configured by the StatsConfig.setFast method.

Returns:

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 maximum depth of the main database tree.

The information is included only if the Database.getStats call was not configured by the StatsConfig.setFast method.

Returns:

maximum depth of the main database tree.

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.

The information is included only if the Database.getStats call was not configured by the StatsConfig.setFast method.

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.

The information is included only if the Database.getStats call was not configured by the StatsConfig.setFast method.

Returns:

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

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()

Returns the number of latch upgrades (relatches) required while operating on this database's BTree. Latch upgrades are required when an operation assumes that a shared (read) latch will be sufficient but later determines that an exclusive (write) latch will actually be required.

Returns:

number of latch upgrades (relatches) required.

getRootSplits

public int getRootSplits()

The number of times the root of the BTree was split.

Returns:

number of times the root was split.

toString

public String toString()

For convenience, the BtreeStats class has a toString method that lists all the data fields.

Overrides:

toString in class Object

toStringVerbose

public String toStringVerbose()