com.hazelcast.query.impl

Class IndexHeapMemoryCostUtil

java.lang.Object

com.hazelcast.query.impl.IndexHeapMemoryCostUtil

public final class IndexHeapMemoryCostUtil
extends Object

Provides utilities useful for on-heap memory cost estimation.

Method Summary

Modifier and Type	Method and Description
static long	estimateMapCost(long size, boolean ordered, boolean usesCachedQueryableEntries) Estimates the on-heap memory cost of a map backing an index.
static long	estimateValueCost(Object value) Estimates the on-heap memory cost of the given value.

Methods inherited from class java.lang.Object

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

Method Detail

estimateValueCost

public static long estimateValueCost(Object value)

Estimates the on-heap memory cost of the given value.

Parameters:

value - the value to estimate the cost of.

Returns:

the estimated value cost.

estimateMapCost

public static long estimateMapCost(long size,
                                   boolean ordered,
                                   boolean usesCachedQueryableEntries)

Estimates the on-heap memory cost of a map backing an index.

Parameters:

size - the size of the map to estimate the cost of.

ordered - true if the index managing the map being estimated is ordered, false otherwise.

usesCachedQueryableEntries - true if queryable entries indexed by the associated index are cached, false otherwise.

Returns:

the estimated map cost.