rtitions remain after the planner
    performs partition pruning.  Another
    reason to be concerned about having a large number of partitions is that
    the server's memory consumption may grow significantly over
    time, especially if many sessions touch large numbers of partitions.
    That's because each partition requires its metadata to be loaded into the
    local memory of each session that touches it.
   </p><p>
    With data warehouse type workloads, it can make sense to use a larger
    number