My preference too, although if I have a case where I know that no one will bother to monitor, I may be proactive and create a 2nd file even without seeing contention.

That said, that script is wrong. It's looking at page numbers that are not PFS, GAM, SGAM pages (other than the 1st set in the file).

PFS - first PFS page is page 1, after that where PageNo % 8088 = 0 (no -1 required)

GAM - first GAM is at page 2, after that where PageID % 511232 = 0 (no -2 required)

SGAM - first SGAM is at page 3, after that where (PageID-1)%511232=0 (not -3 )

Easy to prove, by the formula in the script posted, page 511234 (511234 - 2 = 511232. 511232 % 511232 = 0) should be a GAM page, ie page type 8. Go and look at that in a DB big enough, and I get this:

Page @0x0000000080BA0000

m_pageId = (0:0) m_headerVersion = 0 m_type = 0

m_typeFlagBits = 0x0 m_level = 0 m_flagBits = 0x0

m_objId (AllocUnitId.idObj) = 0 m_indexId (AllocUnitId.idInd) = 0 Metadata: AllocUnitId = 0

Metadata: PartitionId = 0 Metadata: IndexId = -1 Metadata: ObjectId = 0

m_prevPage = (0:0) m_nextPage = (0:0) pminlen = 0

m_slotCnt = 0 m_freeCnt = 0 m_freeData = 0

m_reservedCnt = 0 m_lsn = (0:0:0) m_xactReserved = 0

m_xdesId = (0:0) m_ghostRecCnt = 0 m_tornBits = 0

That's just an unallocated page. Check my formula though (PageID % 511232), it says that 511232 is a GAM.

Sure enough...

Page @0x0000000080B9C000

m_pageId = (1:511232) m_headerVersion = 1 m_type = 8

m_typeFlagBits = 0x0 m_level = 0 m_flagBits = 0x200

m_objId (AllocUnitId.idObj) = 99 m_indexId (AllocUnitId.idInd) = 0 Metadata: AllocUnitId = 6488064

Metadata: PartitionId = 0 Metadata: IndexId = 0 Metadata: ObjectId = 99

m_prevPage = (0:0) m_nextPage = (0:0) pminlen = 90

m_slotCnt = 2 m_freeCnt = 6 m_freeData = 8182

m_reservedCnt = 0 m_lsn = (6664:3406110:62) m_xactReserved = 0

m_xdesId = (0:0) m_ghostRecCnt = 0 m_tornBits = 533630942

Trivial to show similarly that 511233 is an SGAM.