Tom Lane escribió:
> "Jonah H. Harris" <jonah.harris@gmail.com> writes:
> > I probably wouldn't compare checksumming *every* WAL record to a
> > single block-level checksum.
>
> No, not at all. Block-level checksums would be an order of magnitude
> more expensive: they're on bigger chunks of data and they'd be done more
> often.
More often? My intention is that they are checked when the buffer is
read in, and calculated/stored when the buffer is written out.
In-memory changers of the block do not check nor recalculate the sum.
Is this not OK?
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Alvaro Herrera http://www.CommandPrompt.com/
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