This has been saved for the 8.4 release:
http://momjian.postgresql.org/cgi-bin/pgpatches_hold
---------------------------------------------------------------------------
ITAGAKI Takahiro wrote:
> I wrote:
>
> > I'll rewrite my patch to use
> > FSMPageData in both places so that users can always estimate the memory
> > to 6 bytes per page.
>
> Here is a revised patch to reduce memory usage during VACUUM,
> using FSMPageData (6 byte) instead of PageFreeSpaceInfo (8 or 16 bytes).
> The keepable pages with freespace will extended to 21GB from 8GB with
> 16MB of default maintenance_work_mem.
>
> Regards,
> ---
> ITAGAKI Takahiro
> NTT Open Source Software Center
>
[ Attachment, skipping... ]
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://www.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +