Returns information about all entries in caches in SQL Server. Use this view to trace cache entries to their associated objects. You can also use this view to obtain statistics on cache entries.
To call this from Azure SQL Data Warehouse or Parallel Data Warehouse, use the name sys.dm_pdw_nodes_os_memory_cache_entries.
|Column name||Data type||Description|
|cache_address||varbinary(8)||Address of the cache. Is not nullable.|
|name||nvarchar(256)||Name of the cache. Is not nullable.|
|type||varchar(60)||Type of cache. Is not nullable.|
|entry_address||varbinary(8)||Address of the descriptor of the cache entry. Is not nullable.|
|entry_data_address||varbinary(8)||Address of the user data in the cache entry.
0x00000000 = Entry data address is not available.
Is not nullable.
|in_use_count||int||Number of concurrent users of this cache entry. Is not nullable.|
|is_dirty||bit||Indicates whether this cache entry is marked for removal. 1 = marked for removal. Is not nullable.|
|disk_ios_count||int||Number of I/Os incurred while this entry was created. Is not nullable.|
|context_switches_count||int||Number of context switches incurred while this entry was created. Is not nullable.|
|original_cost||int||Original cost of the entry. This value is an approximation of the number of I/Os incurred, CPU instruction cost, and the amount of memory consumed by entry. The greater the cost, the lower the chance that the item will be removed from the cache. Is not nullable.|
|current_cost||int||Current cost of the cache entry. This value is updated during the process of entry purging. Current cost is reset to its original value on entry reuse. Is not nullable.|
|memory_object_address||varbinary(8)||Address of the associated memory object. Is nullable.|
|pages_allocated_count||bigint||Applies to: SQL Server 2008 through SQL Server 2008 R2.
Number of 8-KB pages to store this cache entry. Is not nullable.
|pages_kb||bigint||Applies to: SQL Server 2012 (11.x) through SQL Server 2017.
Amount of memory in kilobytes (KB) used by this cache entry. Is not nullable.
|entry_data||nvarchar(2048)||Serialized representation of the cached entry. This information is cache store dependant. Is nullable.|
|pool_id||int||Applies to: SQL Server 2008 R2 through SQL Server 2017.
Resource pool id associated with entry. Is nullable.
|pdw_node_id||int||Applies to: Azure SQL Data Warehouse, Parallel Data Warehouse
The identifier for the node that this distribution is on.
On SQL Server, requires
VIEW SERVER STATE permission.
On SQL Database, requires the
VIEW DATABASE STATE permission in the database.
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