1) High memory use by SQL Server is normal
2) Max server memory specifies the size of the buffer pool. SQL can and will use memory outside of the buffer pool. This is normal and not a cause for concern, alarm or panic.
3) Don't use Task Manager to monitor SQL's memory, it can be inaccurate (because of the way SQL allocates memory)
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
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