For systems where a SQL Server instance runs on multiple NUMA nodes it would be very helpful and more correct to display the Page Life Expectancy per each NUMA node.
I do not know how to interpret the current display of a single PLE when I have two NUMA nodes.
Paul Randal wrote an article (Page Life Expectancy isn't what you think... - Paul S. Randal ) about a case where the PLE on one NUMA node was very low but no alerts were raised because PLE on other nodes was high enough to skew the average PLE value.
I would point to Glenn Berry's DMV query for PLE (36) as a reference to consider for this improvement.
Thank you,
Radu Popa
