sys.dm_os_stacks (Transact-SQL)

APPLIES TO: yesSQL Server yesAzure SQL Database noAzure SQL Data Warehouse noParallel Data Warehouse

This dynamic management view is used internally by SQL Server to do the following:

  • Keep track of debug data such as outstanding allocations.

  • Assume or validate logic that is used by SQL Server components in places where the component assumes that a certain call has been made.

Column name Data type Description
stack_address varbinary(8) Unique address for this stack allocation. Is not nullable.
frame_index int Each line represents a function call that, when sorted in ascending order by frame index for a particular stack_address, returns the full call stack. Is not nullable.
frame_address varbinary(8) Address of the function call. Is not nullable.


sys.dm_os_stacks requires that the symbols of the server and other components be present on the server to display the information correctly.


On SQL Server, requires VIEW SERVER STATE permission.
On SQL Database Premium Tiers, requires the VIEW DATABASE STATE permission in the database. On SQL Database Standard and Basic Tiers, requires the Server admin or an Azure Active Directory admin account.

See Also

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