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sys.dm_os_virtual_address_dump (Transact-SQL)

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Applies to: SQL Server Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)

Returns information about a range of pages in the virtual address space of the calling process.

Note

This information is also returned by the VirtualQuery Windows API.

Note

To call this from Azure Synapse Analytics or Analytics Platform System (PDW), use the name sys.dm_pdw_nodes_os_virtual_address_dump. This syntax is not supported by serverless SQL pool in Azure Synapse Analytics.

Column name Data type Description
region_base_address varbinary(8) Pointer to the base address of the region of pages. Is not nullable.
region_allocation_base_address varbinary(8) Pointer to the base address of a range of pages allocated by the VirtualAlloc Windows API function. The page pointed to by the BaseAddress member is contained within this allocation range. Is not nullable.
region_allocation_protection varbinary(8) Protection attributes when the region was first allocated. The value is one of the following:

- PAGE_READONLY
- PAGE_READWRITE
- PAGE_NOACCESS
- PAGE_WRITECOPY
- PAGE_EXECUTE
- PAGE_EXECUTE_READ
- PAGE_EXECUTE_READWRITE
- PAGE_EXECUTE_WRITECOPY
- PAGE_GUARD
- PAGE_NOCACHE

Is not nullable.
region_size_in_bytes bigint Size of the region, in bytes, starting at the base address in which all the pages have the same attributes. Is not nullable.
region_state varbinary(8) Current state of the region. This is one of the following:

- MEM_COMMIT
- MEM_RESERVE
- MEM_FREE

Is not nullable.
region_current_protection varbinary(8) Protection attributes. The value is one of the following:

- PAGE_READONLY
- PAGE_READWRITE
- PAGE_NOACCESS
- PAGE_WRITECOPY
- PAGE_EXECUTE
- PAGE_EXECUTE_READ
- PAGE_EXECUTE_READWRITE
- PAGE_EXECUTE_WRITECOPY
- PAGE_GUARD
- PAGE_NOCACHE

Is not nullable.
region_type varbinary(8) Identifies the types of pages in the region. The value can be one of the following:

- MEM_PRIVATE
- MEM_MAPPED
- MEM_IMAGE

Is not nullable.
pdw_node_id int Applies to: Azure Synapse Analytics, Analytics Platform System (PDW)

The identifier for the node that this distribution is on.

Permissions

Requires VIEW SERVER STATE permission on the server.

Permissions for SQL Server 2022 and later

Requires VIEW SERVER PERFORMANCE STATE permission on the server.

See also

Dynamic Management Views and Functions (Transact-SQL)
SQL Server Operating System Related Dynamic Management Views (Transact-SQL)