com.bigdata.btree

Class BTreePageStats

java.lang.Object

com.bigdata.btree.BaseIndexStats

com.bigdata.btree.PageStats

com.bigdata.btree.BTreePageStats

public class BTreePageStats
extends PageStats

Field Summary

Fields inherited from class com.bigdata.btree.PageStats

blobs, histogram, leafBytes, maxLeafBytes, maxNodeBytes, minLeafBytes, minNodeBytes, nerrors, nodeBytes, nrawRecs, nvisited, rawRecBytes, SLOT_SIZES

Fields inherited from class com.bigdata.btree.BaseIndexStats

height, indexType, m, name, nleaves, nnodes, ntuples

Constructor Summary

Constructors

Constructor and Description
BTreePageStats()

Method Summary

Methods

Modifier and Type	Method and Description
int	getRecommendedBranchingFactor() This computes the recommended branching factor for the index based on an examination of the current branching factor, an assumed nominal page size of 8k, the min, max, and average node and leaf sizes, and the histogram of the allocation sizes for the index.
void	visit(AbstractBTree btree, AbstractNode<?> node)

Methods inherited from class com.bigdata.btree.PageStats

getBytesPerLeaf, getBytesPerNode, getBytesPerRawRecord, getDataRow, getHeaderRow, getTotalBytes, toString, trackSlotSize, visit

Methods inherited from class com.bigdata.btree.BaseIndexStats

writeOn

Methods inherited from class java.lang.Object

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

Constructor Detail

BTreePageStats

public BTreePageStats()

Method Detail

visit

public void visit(AbstractBTree btree,
         AbstractNode<?> node)

getRecommendedBranchingFactor

public int getRecommendedBranchingFactor()

Description copied from class: PageStats

This computes the recommended branching factor for the index based on an examination of the current branching factor, an assumed nominal page size of 8k, the min, max, and average node and leaf sizes, and the histogram of the allocation sizes for the index.

Specified by:

getRecommendedBranchingFactor in class PageStats

Returns:

See Also:

Optimize RWStore allocator sizes TODO This says "branching factor", but {@link #m} is overloaded and is the branching factor for the BTree and the addressBits for the HTree. This method should be renamed (or moved into the concrete instances of this class).