# Package org.apache.ignite.internal.metric

Interface Summary
IoStatisticsHolder: Holder of IO statistics.

Class Summary
IoStatisticsHolderCache: Cache statistics holder to gather statistics related to concrete cache.
IoStatisticsHolderIndex: Index statistics holder to gather statistics related to concrete index.
IoStatisticsHolderNoOp: No Operation IO statistics holder.
IoStatisticsHolderQuery: Query Statistics holder to gather statistics related to concrete query.
IoStatisticsQueryHelper: Helper for gathering IO statistics.

Enum Summary
IndexPageType: Enumeration of types of b-tree index pages.
IoStatisticsType: Type of statistics.

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Ignite Database and Caching Platform | : ver. 2.12.0
Release Date | : January 10 2022