Re: 16-bit page checksums for 9.2 - Mailing list pgsql-hackers

From Tom Lane
Subject Re: 16-bit page checksums for 9.2
Date
Msg-id 13585.1324737976@sss.pgh.pa.us
Whole thread Raw
In response to 16-bit page checksums for 9.2  (Simon Riggs <simon@2ndQuadrant.com>)
Responses Re: 16-bit page checksums for 9.2  (Andres Freund <andres@anarazel.de>)
Re: 16-bit page checksums for 9.2  (Simon Riggs <simon@2ndQuadrant.com>)
List pgsql-hackers
Simon Riggs <simon@2ndQuadrant.com> writes:
> After the various recent discussions on list, I present what I believe
> to be a working patch implementing 16-but checksums on all buffer
> pages.

I think locking around hint-bit-setting is likely to be unworkable from
a performance standpoint.  I also wonder whether it might not result in
deadlocks.

Also, as far as I can see this patch usurps the page version field,
which I find unacceptably short-sighted.  Do you really think this is
the last page layout change we'll ever make?
        regards, tom lane


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