On Wed, 2009-02-04 at 02:39 +0000, Greg Stark wrote: > On Tue, Feb 3, 2009 at 10:06 PM, Simon Riggs <simon@xxxxxxxxxxxxxxx> wrote: > > > > On Tue, 2009-02-03 at 15:03 -0500, Chris Mayfield wrote: > > > >> 1. Having to rewrite entire tables out to disk the first time I scan > >> them, for example: > >> > >> CREATE TABLE t1 AS ...; -- writes 100 GB to disk > >> CREATE INDEX i1 ON t1 ...; -- rewrites 100 GB to disk > >> > >> The main issue is setting the hint bits for each tuple, which IMO should > >> initially be set for "CREATE TABLE AS" statements. To work around this > >> for now, I modified heap_insert (in heapam.c) to mark tuples as > >> committed when inserting them into newly added pages without WAL: > > > > I'll take this for 8.5. > > This was proposed once already and some difficulties were identified. > Do you remember what they were? Time, mainly. Technical issues were not insurmountable, just more subtle than I had originally thought. -- Simon Riggs www.2ndQuadrant.com PostgreSQL Training, Services and Support -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
