What's the average size memory RAM needed for SQL Server 2008 R2

Hi Experts,
 What's the average size memory RAM needed for SQL Server 2008 R2?

Thanks in advance,
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Vitor MontalvãoMSSQL Senior EngineerCommented:
What's your largest database size?
What's going to be installed in the server?
Are you talking about a Stand Alone or a Cluster solution?
How many instances of SQL Server?
Which version and edition of Windows Server?
Ryan McCauleyEnterprise Analytics ManagerCommented:
The easy answer is "as much as you can give it, as RAM is generally cheaper than performance problems", but the longer answer is that "it depends and is complicated". It depends on how many users you'll have at a time, how large your databases are, how fast your storage is (slower storage means that reads from disk are more time-consuming, so everything you can cache helps), and a number of other factors.

Brent Ozar's site has a pretty solid write-up that explains what you'll need to consider as you size up RAM requirements, and it's especially helpful if you can measure performance and behavior of your application on a server that already exists (but you can make some estimates if you don't have a test server):


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft SQL Server 2008

From novice to tech pro — start learning today.