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sys.dm_os_memory_nodes (Transact-SQL)

Allocations that are internal to SQL Server use the SQL Server memory manager. Tracking the difference between process memory counters from sys.dm_os_process_memory and internal counters can indicate memory use from external components in the SQL Server memory space.

Nodes are created per physical NUMA memory nodes. These might be different from the CPU nodes in sys.dm_os_nodes.

No allocations done directly through Windows memory allocations routines are tracked. The following table provides information about memory allocations done only by using SQL Server memory manager interfaces.

Column name

Data type

Description

memory_node_id

smallint

Specifies the ID of the memory node. Related to memory_node_id of sys.dm_os_memory_clerks. Not nullable.

virtual_address_space_reserved_kb

bigint

Indicates the number of virtual address reservations, in kilobytes (KB), which are neither committed nor mapped to physical pages. Not nullable.

virtual_address_space_committed_kb

bigint

Specifies the amount of virtual address, in KB, that has been committed or mapped to physical pages. Not nullable.

locked_page_allocations_kb

bigint

Specifies the amount of physical memory, in KB, that has been locked by SQL Server. Not nullable.

pages_kb

bigint

Specifies the amount of committed memory, in KB, which is allocated from this NUMA node by Memory Manager Page Allocator. Not nullable.

shared_memory_reserved_kb

bigint

Specifies the amount of shared memory, in KB, that has been reserved from this node. Not nullable.

shared_memory_committed_kb

bigint

Specifies the amount of shared memory, in KB, that has been committed on this node. Not nullable.

cpu_affinity_mask

bigint

Internal use only. Not nullable.

online_scheduler_mask

bigint

Internal use only. Not nullable.

processor_group

smallint

Internal use only. Not nullable.

foreign_committed_kb

bigint

Specifies the amount of committed memory, in KB, from other memory nodes. Not nullable.

Requires VIEW SERVER STATE permission on the server.

In SQL Server 2012, the following columns have been renamed.

Previous Column Name

New Column Name

single_pages_kb

pages_kb

multi_pages_kb

foreign_committed_kb

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