random_page_cost for tablespace

  Hi All,

We have a bigger table with some million rows. Number of index scans is
high, number of seq reads is low. This table if often joined with
others... so we want to buy a new SSD drive, create a tablespace on it
and put this big table on it. Random read speed on SSD is identical to
seq read. However, I need to tell the optimizer that random_page_cost is
less for the new tablespace. Is there a way to do it?

Thanks,

   Laszlo