From: | "Ryan Bradetich" <rbradetich(at)gmail(dot)com> |
---|---|
To: | "Martijn van Oosterhout" <kleptog(at)svana(dot)org> |
Cc: | "Gregory Stark" <stark(at)enterprisedb(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Question regarding the database page layout. |
Date: | 2008-09-02 16:06:16 |
Message-ID: | e739902b0809020906k42672e31oca2c9a1ed48aa1b6@mail.gmail.com |
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Lists: | 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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