Re: Question regarding the database page layout. - Mailing list pgsql-hackers

From Ryan Bradetich
Subject Re: Question regarding the database page layout.
Date
Msg-id e739902b0809020906k42672e31oca2c9a1ed48aa1b6@mail.gmail.com
Whole thread Raw
In response to Re: Question regarding the database page layout.  (Martijn van Oosterhout <kleptog@svana.org>)
List pgsql-hackers
Hello Martijn,

> You need to arrange testing on an architechture that has strict
> alignment reuiqrements. For example i386 doesn't care about alignment
> at all and will anything from anywhere, with performance degradation.
>
> Other architechtures will simply throw exceptions, that's the smoke
> test.

From other comments in this thread, I still have quite a bit of work ahead
of me :)  If I can accomplish this, then I will run it on a different
architecture.
I have access to a parisc-linux and a powerpc system.

> Also, what's the performance cost?

Not sure yet.  My goal would be 0 impact on 32-bit system and something small
on 64-bit systems that would hopefully be overcome by a performance gain in IO.

Thanks for your feedback.

- Ryan


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