sys.dm_os_memory_clerks shows duplicate entries for memory clerks

if you run the following code in SQL Server 2008 RTM:

1 select * from sys.dm_os_memory_clerks

2 where type = 'MEMORYCLERK_SQLBUFFERPOOL'

You will get the following output:

You can observe that there are 2 entries for the BUFFER POOL memory clerk. Initially, I thought that it is for different memory nodes and I was wondering that it could have something to do with NUMA. But if you observer that memory_node_id columns shows 0 for both the entries, leaving me completely baffled, more so when the memory_clerk_address for both the records are different.

The other entry (what we see as duplicate) is actually for DAC . SQL Server 2008 RTM shows the physical memory node (0) for DAC entry which is incorrect. This issue was fixed in R2. If you run the same DMV in SQL Server 2008 R2, you will get the correct output as follows:

Memory Node ID 64 is logical and belongs to DAC.