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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Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

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