Yes, you are correct the third one is the page number.

Say you have a wait on resource 5:1:9337310

In my case DB 5 is Items and File 1 is Items_Data.

Run the following to get the object info:

dbcc traceon (3604)

go

dbcc page (5, 1, 9337310)

The output shows the objectId : m_objId = 978102525

Then object_name (id) gives you the object.

DBCC execution completed. If DBCC printed error messages, contact your system administrator.

PAGE: (1:9337310)

-----------------

BUFFER:

-------

BUF @0x19A3E680

---------------

bpage = 0x7B764000 bhash = 0x00000000 bpageno = (1:9337310)

bdbid = 5 breferences = 1 bstat = 0x9

bspin = 0 bnext = 0x00000000

PAGE HEADER:

------------

Page @0x7B764000

----------------

m_pageId = (1:9337310) m_headerVersion = 1 m_type = 1

m_typeFlagBits = 0x0 m_level = 0 m_flagBits = 0x8000

m_objId = 978102525 m_indexId = 0 m_prevPage = (1:9337311)

m_nextPage = (1:9337309) pminlen = 68 m_slotCnt = 109

m_freeCnt = 30 m_freeData = 7944 m_reservedCnt = 0

m_lsn = (9238:816300:27) m_xactReserved = 0 m_xdesId = (0:0)

m_ghostRecCnt = 0 m_tornBits = 37750929

Allocation Status

-----------------

GAM (1:9202176) = ALLOCATED

SGAM (1:9202177) = NOT ALLOCATED

PFS (1:9333552) = 0x40 ALLOCATED 0_PCT_FULL DIFF (1:9202182) = CHANGED

ML (1:9202183) = NOT MIN_LOGGED