SQL Tips by Namwar Rizvi

August 5, 2007

Utilize multiple processors’ power by using just a single SQL Server license

Filed under: Information,Performance,SQL Server 2005 — namwar @ 8:40 PM

Everyone knows multiple processors mean more power to SQL Server but this also means multiple licenses i.e. one for each processor. So is there any way we can reduce cost but not the SQL Server computing power???
Yes, there is a way; buy multi-core processor.
SQL Server is licensed for each socket no matter how many cores do you have. A quad core processor means you can have the power of 4 processors smashed in one socket so you just need 1 license of SQL Server.

Don’t confuse Hyper-threading with Multi-core systems because Hyper-threading is just the virtual core not more than that. Infact a hyper-threaded processor sometime may slowdown your query because of lack of actual parallelism possible.
On the other hand multi-core processors have totally different architecture and will behave like real multiple processors.
So if you are about to suggest multiple processors for the new SQL Server then think again and research on multi-core processors and save your company money.
For the detailed discussion of dual processor and Multi-core architecture, please visit here

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