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SQL server tempdb database

Posted on 2013-02-06
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Last Modified: 2013-06-05
Hi!
I've search the web for explanation on how to increase the number of tempdb data files and I found nothing.  I'm using SQL 2012.  Can somebody explain me how to do that?

Thanks

JS
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Question by:polycorjsp
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Expert Comment

by:Aneesh Retnakaran
ID: 38860081
Using multiple data files reduces tempdb storage contention and yields significantly better scalability. As a general guideline, create one data file for each CPU on the server (accounting for any affinity mask settings) and then adjust the number of files up or down as necessary. However, do not create too many files because this can reduce performance and increase management overhead.I would rather create these files on separate disks and wont go above 8 files; try adding another one or 3 files and check for the contension before going further.

Note that a dual-core CPU is considered to be two CPUs.
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by:polycorjsp
ID: 38860090
How do I creat those files?
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Aneesh Retnakaran earned 500 total points
ID: 38860107
you should check this

http://www.sqlskills.com/blogs/paul/a-sql-server-dba-myth-a-day-1230-tempdb-should-always-have-one-data-file-per-processor-core/

You can add them using an alter database statement

ALTER DATABASE tempdb
ADD FILE (NAME = tempdev2, FILENAME = 'F:\tempdb2.mdf', SIZE = 256);
ALTER DATABASE tempdb
ADD FILE (NAME = tempdev3, FILENAME = 'G:\tempdb3.mdf', SIZE = 256);
ALTER DATABASE tempdb
ADD FILE (NAME = tempdev4, FILENAME = 'h:\tempdb4.mdf', SIZE = 256);
GO
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Expert Comment

by:Anthony Perkins
ID: 38863838
Aneesh,
As a general guideline, create one data file for each CPU on the server
...
http://www.sqlskills.com/blogs/paul/a-sql-server-dba-myth-a-day-1230-tempdb-should-always-have-one-data-file-per-processor-core/
The general guideline is start with 4 and then add as necessary.
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Author Comment

by:polycorjsp
ID: 38939404
Sorry for the delay.  I will test that soon

Thanks!
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