We have extended event session to monitor buffer_node_page_life_expectancy on our production server which is having 64GB RAM out of which 58 is assigned to SQL but the buffer_node_page_life_expectancy is showing at 700. I understand the value is in Milliseconds and seems too low .
Can experts please advise?
I have also checked Buffer Cache Hit Ratio which is very high and Lazy Writes\Sec which is low. This looks normal as per my understanding. Please correct me if I am wrong.