Thanks for your answer, one last question i would like to know is, if SQL Server like to consume whole available memory then why it is not consuming whole RAM...

SQL Server is occupying the RAM which it is set Max, and additionally it is also taking the Memory which is left for Windows, where do i need to look...

Is the counters i had given are at optimal condition or do i need to increase RAM to 128 GB as [highlight="#FFFBCC"]Target server memory[/highlight] is showing 62 GB approximately

Thank you every one for your replies.

Thank You

I get your point : 1 FULL Backup + Most Recent Diff Backup + All Cumulative log backups since Last full backup is this correct.