SQL Server Max memory for 64GB

right now the max memory option is default size (too big).

the actual physical size of RAM is 64GM.

this is a dedicated sql server. in this case, leaving it to default size is bad idea, as sql can start using up to 62,63,63.5GB and so forth? pl advise.
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Randy Knight, MCMPrincipal ConsultantCommented:
SQL Server will take every bit of memory you give it and use it for buffer cache.  So setting max memory correctly is very important.  This is probably the #1 misconfigured item I see on SQL Servers.  Based on your description of your environment, I  would reserve 8GB or so for the OS and then monitor for OS memory issues.

Here is an excellent article on the details, including how to monitor memory.

http://www.sqlskills.com/blogs/jonathan/how-much-memory-does-my-sql-server-actually-need/
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Microsoft SQL Server 2008

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