![]() These node IDs correspond to the NUMA node configuration of the computer that is running SQL Server. This memory is stolen from the buffer pool. SinglePage Allocator: This value shows the memory that is allocated through the single-page allocator by threads that are running on this node. This memory comes from outside the buffer pool. MultiPage Allocator: This value shows the memory that is allocated through the multipage allocator by threads that are running on this node. (For more information, see SQL Server Books Online.) To track memory that is allocated by individual NUMA nodes, use SQL Server: Buffer Node performance objects. However, the overall AWE Allocated value in the Memory Manager section is a correct value. In a NUMA-enabled system, this value can be incorrect or negative. Or, this value shows the overall amount of memory that is consumed by locked pages on the 64-bit version of the product. VM Committed: This value shows the VAS that is committed by threads that are running on this node.ĪWE Allocated: This value shows the memory that is allocated through the AWE mechanism on the 32-bit version of the product. VM Reserved: This value shows the VAS that is reserved by threads that are running on this node. These values are not the memory that is local to the NUMA node. These values show the memory that is allocated by threads that are running on this NUMA node. In an SMP system, there will be a single Memory node entry. In a Non-uniform memory access (NUMA) enabled system, there will be a corresponding Memory node entry for each hardware NUMA node. The Memory Manager section is followed by a summary of memory usage for each memory node. Reserved Memory In Use: This value shows the reserved memory that is being used.Reserved Memory: This value shows the memory that is reserved for the dedicated administrator connection (DAC).Or, this value shows the overall amount of memory that locked pages consume on the 64-bit version of the product. AWE Allocated: This value shows the overall amount of memory that is allocated through the AWE mechanism on the 32-bit version of SQL Server.VAS that is committed has been associated with physical memory. VM Committed: This value shows the overall amount of VAS that SQL Server has committed.VM Reserved: This value shows the overall amount of virtual address space (VAS) that SQL Server has reserved.The elements in this section are the following: This section shows overall memory consumption by SQL Server. The first section of the output is Memory Manager. The output now contains several sections that were unavailable in earlier product versions. The output of the DBCC MEMORYSTATUS command has changed from earlier releases of SQL Server. Therefore, applications that use this command may break without warning. No additional warnings will be made before this command is changed or removed. Therefore, in later product versions, this command may no longer function. The functionality that the DBCC MEMORYSTATUS command provides may be replaced by a different mechanism in later product versions. The format of the output and the level of detail that is provided are subject to change between service packs and product releases. The DBCC MEMORYSTATUS command is intended to be a diagnostic tool for Microsoft Customer Support Services. (Many out-of-memory errors automatically print this output in the error log.) Microsoft Customer Support Services may also request that you run this command during a specific support incident if you are experiencing an error that may be associated with a low-memory condition. You can use the output from this command to troubleshoot memory consumption issues in SQL Server or to troubleshoot specific out-of-memory errors. The DBCC MEMORYSTATUS command provides a snapshot of the current memory status of SQL Server. It also describes the output about global memory objects, about query memory objects, about optimization, and about memory brokers. This article describes the elements of the output for Memory Manager, for the summary of memory usage, for the aggregate memory information, for the buffer distribution information, for the buffer pool information, and for the procedure cache information. This command is frequently used to troubleshoot Microsoft SQL Server memory consumption issues. This article discusses the output of the DBCC MEMORYSTATUS command. Original product version: SQL Server Original KB number: 907877 Summary ![]() This article describes how to use the DBCC MEMORYSTATUS command to monitor memory usage.
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