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Create a TEMPDB Database to each CPU on Server

Posted on 2011-03-25
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Hi Experts
What is the way to create a TEMPDB database for each CPU on the Server? and then how assign every database to each CPU?

thanks.
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Question by:saulpilot439
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Neil Russell earned 125 total points
ID: 35218283
QUOTED FROM: http://www.sqlservercentral.com/Forums/Topic391927-360-1.aspx

Very very very important - NOT filegroups, files. For any database, not just tempdb, you may gain performance by having the same number of files per filegroup as you have cpu sockets or cores ( don't do this for hyperthreading ).

Putting tempdb on it's own array is another matter and not directly related to database files.

here's an example to create an 8 file tempdb

use master

go

Alter database tempdb modify file (name = tempdev, filename = 'D:\Program Files\Microsoft SQL Server\MSSQL\data\tempdb_db1.mdf',size = 60Mb,filegrowth = 20Mb)


use master

go

Alter database tempdb add file (name = tempdev2, filename = 'D:\Program Files\Microsoft SQL Server\MSSQL\data\tempdb_db2.mdf',size = 60Mb,filegrowth = 20Mb),

( name = tempdev3, Filename = 'D:\Program Files\Microsoft SQL Server\MSSQL\data\tempdb_db3.mdf',size = 60Mb,filegrowth = 20Mb),

( name = tempdev4, Filename = 'D:\Program Files\Microsoft SQL Server\MSSQL\data\tempdb_db4.mdf',size = 60Mb,filegrowth = 20Mb),

( name = tempdev5, Filename = 'D:\Program Files\Microsoft SQL Server\MSSQL\data\tempdb_db5.mdf',size = 60Mb,filegrowth = 20Mb),

( name = tempdev6, Filename = 'D:\Program Files\Microsoft SQL Server\MSSQL\data\tempdb_db6.mdf',size = 60Mb,filegrowth = 20Mb),

( name = tempdev7, Filename = 'D:\Program Files\Microsoft SQL Server\MSSQL\data\tempdb_db7.mdf',size = 60Mb,filegrowth = 20Mb),

( name = tempdev8, Filename = 'D:\Program Files\Microsoft SQL Server\MSSQL\data\tempdb_db8.mdf',size = 60Mb,filegrowth = 20Mb)

go



The GrumpyOldDBA
www.grumpyolddba.co.uk
http://sqlblogcasts.com/blogs/grumpyolddba/ 
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LVL 37

Expert Comment

by:Neil Russell
ID: 35218345
Oh and you dont need to assign a db file to a cpu. The whole point is that if you have 2 x Quad core CPU's then thats 8 threads. Wach thread can access 1 file, so in theory 8 threads = 8 files in a group = the setup shown above.
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Author Closing Comment

by:saulpilot439
ID: 35218349
Great, Greate Answer Neilsr thank very Much with this I have my problem solved.

Thanks Expert.
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Author Comment

by:saulpilot439
ID: 35218394
Thanks very Much Neilsr.

This answer help me  for to night on my change. Thanks
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