Re: [WIP] Reduce alignment requirements on 64-bit systems.

Added to TODO:
Reduce data row alignment requirements on some 64-bit systems    *
http://archives.postgresql.org/pgsql-hackers/2008-10/msg00369.php
 


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Ryan Bradetich wrote:
> Hello all,
> 
> Here is a proof-of-concept patch for reducing the alignment
> requirement for heap tuples on 64-bit systems.
> This patch passes the regression tests and a couple of other data sets
> I have thrown at it.
> 
> I am hoping to get some early feedback on this patch so I have time to
> make any corrections, improvements,
> etc before the November commit-fest deadline.
> 
> There are two visible savings in the system catalogs using this patch
> (size was gathered using \S+):
> 
> Catalog              Pre-Patch Size      After Patch Size
> 
> pg_depend         312 kB                  296 kB
> pg_description    160 kB                  152 kB
> 
> 
> One thing I am considering, but I am not sure if it is worth the code
> uglification, is to wrap the majority of these
> checks in #ifdefs so they only are used on 64-bit systems.   This
> would completely eliminate the impact for this
> patch on 32-bit systems, which would not gain any benefit from this patch.
> 
> Feedback welcome!
> 
> Thanks,
> 
> - Ryan

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