Done:

Done:

< * Allow sequential scans to take advantage of other concurrent
> * -Allow sequential scans to take advantage of other concurrent
<
<   One possible implementation is to start sequential scans from the lowest
<   numbered buffer in the shared cache, and when reaching the end wrap
<   around to the beginning, rather than always starting sequential scans
<   at the start of the table.
<
<   http://archives.postgresql.org/pgsql-patches/2006-12/msg00076.php
<   http://archives.postgresql.org/pgsql-hackers/2006-12/msg00408.php
<   http://archives.postgresql.org/pgsql-hackers/2006-12/msg00784.php
<   http://archives.postgresql.org/pgsql-hackers/2007-03/msg00415.php
<