item"><p>
       Seldom-used data can be migrated to cheaper and slower storage media.
      </p></li></ul></div><p>

     These benefits will normally be worthwhile only when a table would
     otherwise be very large. The exact point at which a table will
     benefit from partitioning depends on the application, although a
     rule of thumb is that the size of the table should exceed the physical
     memory of the database server.
    </p><p>
     <span class="productname">PostgreSQL</span> offers buil