Thanks for the information. i will ignore these alerts.

No, both options are not enabled. just now i checked in server setting in advanced options both values is set mention below's.

1) Locks value is 0.

2) Optimize for Ad hoc...

Yes, all counter are good and showing good result. but sql server did not hit any memory related error's.

i have some input's in mind.

1) i have to apply SP2...