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 TempDB Log File Size - sys.master_files vs OS

Author  Topic 

Bustaz Kool
Master Smack Fu Yak Hacker

1834 Posts

Posted - 2009-07-30 : 19:21:20
We are seeing a wide difference (ordr of magnitude) in the size of the TempDB log file between what is reported in sys.master_files and what is reported by the Windows operating system. Our methodology is to pull the Size out of the sys.master_files table and convert the number of pages by page size and compare this number against what's in file manager. I don't expect an exact match but this seems excessive for round-off error.

Also, sometimes Enterprise Manager will report a negative number for the percentage of free space for the file.

We do operate in a 24x7 environment so the servers do not get restarted on any regular basis.

Any ideas on what might be causing these discrepancies?

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Men build too many walls and not enough bridges. -Isaac Newton, philosopher and mathematician (1642-1727)

Bustaz Kool
Master Smack Fu Yak Hacker

1834 Posts

Posted - 2010-06-03 : 14:37:50
Sooooo anyway...

It appears that the numbers in sys.master_files is not in sync with sys.database_files. The latter seems accurate. The problem is that the sys.database_files table is local to each database. This link has code to work around this: http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=89058


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A couple of months in the laboratory can save a couple of hours in the library. -Frank H. Westheimer, chemistry professor (1912-2007)
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