Different PLE's on different numa nodes

We are running 2 node Availaibility Group FC servers with 3 numa nodes. On our Prod servers the PLE's differ from node to node on the Primary node yet and are the same on the Secondary node yet on our Accp servers the PLE's are identical on each node of
both the Primary and the Secondary Application-Intent Replica.
It might be expected to have different PLE's per node because of the workload. Could this also indicate some kind of targetting of a node by processes?
We are having performance issues on Production and this is also reflected by high write latency on TempDB which is on an SSD.
Any ideas?
Thanks
Chris

What exactly are the numbers on the different nodes?
Have you set the configuration parameter "max degrees of parallelism" to some value lower than the number of cores?
What type of system is this? OLTP, Data Warehouse?
My gut reaction is that you have a process that gets a couple schedulers on the same NUMA node and this process scans more data than fits into memory. But that is likely to be too simplisitic.
A better question is: should you focus on the PLE skew, or should you track down the root cause to the performance issues? I can't but see that the PLE skew is a token of the same problem.
Erland Sommarskog, SQL Server MVP, [email protected]

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