Most memory allocations that are attributed to the SQL Server process space are controlled through interfaces that allow for tracking and accounting of those allocations. However, memory allocations might be performed in the SQL Server address space that bypasses internal memory management routines. Values are obtained through calls to the base operating system. They are not manipulated by methods internal to SQL Server, except when it adjusts for locked or large page allocations.
All returned values that indicate memory sizes are shown in kilobytes (KB). The column total_virtual_address_space_reserved_kb is a duplicate of virtual_memory_in_bytes from sys.dm_os_sys_info.
The following table provides a complete picture of the process address space.
To call this from Azure Synapse Analytics (SQL Data Warehouse) or Parallel Data Warehouse, use the name sys.dm_pdw_nodes_os_process_memory.
|Column name||Data type||Description|
|physical_memory_in_use_kb||bigint||Indicates the process working set in KB, as reported by operating system, as well as tracked allocations by using large page APIs. Not nullable.|
|large_page_allocations_kb||bigint||Specifies physical memory allocated by using large page APIs. Not nullable.|
|locked_page_allocations_kb||bigint||Specifies memory pages locked in memory. Not nullable.|
|total_virtual_address_space_kb||bigint||Indicates the total size of the user mode part of the virtual address space. Not nullable.|
|virtual_address_space_reserved_kb||bigint||Indicates the total amount of virtual address space reserved by the process. Not nullable.|
|virtual_address_space_committed_kb||bigint||Indicates the amount of reserved virtual address space that has been committed or mapped to physical pages. Not nullable.|
|virtual_address_space_available_kb||bigint||Indicates the amount of virtual address space that is currently free. Not nullable.
Note: Free regions that are smaller than the allocation granularity can exist. These regions are unavailable for allocations.
|page_fault_count||bigint||Indicates the number of page faults that are incurred by the SQL Server process. Not nullable.|
|memory_utilization_percentage||int||Specifies the percentage of committed memory that is in the working set. Not nullable.|
|available_commit_limit_kb||bigint||Indicates the amount of memory that is available to be committed by the process. Not nullable.|
|process_physical_memory_low||bit||Indicates that the process is responding to low physical memory notification. Not nullable.|
|process_virtual_memory_low||bit||Indicates that low virtual memory condition has been detected. Not nullable.|
|pdw_node_id||int||Applies to: Azure Synapse Analytics (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 the server.
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.