General RAM Recommendation for VMGuest OS Running SQL 2008 R2

Looking for just  rough / general recommendation on the amount of RAM that should be given to a VMGuestOS thats running SQL 2008 R2 on Windows 2008 R2.

Some considerations:

A maximum of 60 to 80 people would be connected to it at any given time.

The amount of data that will be inserted/updated per 24 hour period would not exceed 100 MB

Would 2 GB Suffice, or Should I consider 4 GB for this VMGuestOS ?

Any recommendations would be appreciated.
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ACECORPAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
I would recommend 2vCPU and a minimum of 8GB, using a RAID 10 datastore for storage of the virtual disks.
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Svet PaperovIT ManagerCommented:
4GB is the recommended minimum for Windows Server 2008. So, I will support @hanccocka's recommendations.
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hirenvmajithiyaManager (System Administration)Commented:
Microsoft recommendation is 4GB or more.
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Aaron TomoskySD-WAN SimplifiedCommented:
I'll add that it really depends on what roles you plan on having. As just a fileshares you could indeed get by with 4gb. If you want to run dns/ad/radius/etc... Now you are definitely lookin at 8gb.
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IanThCommented:
I think 4gb is fine

see
http://msdn.microsoft.com/en-us/library/ms143506.aspx

it does depend also on the database imho
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CarlosDominguezCommented:
Although Microsoft recommends to leave 4GB only to the OS, I think 4 or 6 GB (total) must be OK.
In any case, soon you will see that the memory is being consumed by the sqlserver process. The combination W2008R2 + SQL2008R2 will get use of all the memory you have installed. It must not be a problem (if you are using the server only for SQL), so the recommendation is not to install any other service, role or third party software in that server.

If you need to install something else, or you experience problems with the server, you can limit the memory SQL Server could use: http://msdn.microsoft.com/en-us/library/ms191144.aspx

If you do not limit the memory for SQL Server, it will take ll the available memory. It's just a question of time the graph in the task manager will show you almost near 90% used (nevertheless you install 4, 8 or 12 GB...)
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