Question : SQL 2008 - High Memory USage

We have SQL Server 2008 installed on server 2008 R2.  It is currently running at 3GB of RAM all the time, until a reboot and then it goes back down to 300MB.  The program it is using is not the intense and should not require that much RAM.  

I do not use SQL, but from what i read, SQL is supposed to utilize memory when needed and then release it back to the OS when not needed, which is not happening.

Questions:
- Has anyone seen this before?  If so, is there one hot fix
- Has anyone upgraded to SQL Server 2008 SP1 and had any issues?

Since I do not use SQL a lot I am hesitant to upgrade to SP1 without testing and I dont have the ability to replicate that environment.

Answer : SQL 2008 - High Memory USage

Parallel is not available. You'll have to rely on standard Threads.