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> > Can someone tell me what the maximum tuple length is? Is it sort of
> > BLCKSZ or BLCKSZ/2? I don't remember if we require the ability to have
> > at least two tuples in a block.
>
> IIRC, the max tuple size was always intended to be BLCKSZ, it's just the max
> size of the text fields that were 4096. I don't remember any discussions
> ever on this list about trying to control the # of tuples stored per block.
>
That is what I found too, but vacuum seems to use BLCKSZ/2, varchar uses
BLCKSZ/2, and tuple size is BLCKSZ. Doesn't make any sense.
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