Thanks for explaining the details. In my application though (millions of TPS executing in an MVCC system) I just can't wait possibly tens of ms for membarrier(2

Thanks for explaining the details. In my application though (millions of TPS executing in an MVCC system) I just can't wait possibly tens of ms for membarrier(2) to return: way too much garbage could accumulate in the meantime. From my POV this isn't much better than EBR in terms of low/deterministic latency (it is better in terms of fault-tolerance, if you have out-of-proc clients, but I can reliably detect crashed clients anyway via a Unix domain stream socket and clean up their garbage for them).