Above post edited heavily, take another read through it.
One more thing, as I mentioned I enabled AWE, how much time it took to take in effect ? According to my knowledge its hot swap dont need restart
Huh?
AWE has nothing to do with hot swapping memory. AWE is used for 32-bit processes to access memory above the 4GB limit. Unless this is a 32-bit instance, AWE is useless.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability