Re: TOAST behavior in 8.3 and 8.4

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Lewis Kapell <lkapell@xxxxxxxxxxxxx> wrote:
 
> I don't understand what that '256 bytes' refers to.  That is a far
> cry from 2kb.  I would be grateful if anyone can fill in the
> evident gap in my knowledge here.
 
It doesn't try to compress anything unless the tuple (row instance)
as a whole is above TOAST_TUPLE_THRESHOLD.  In trying to reduce the
tuple size, it won't consider compressing column values below a
certain size.  That is where the 256 versus 32 bytes comes in.
 
-Kevin

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