Re: Size of tuples

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On 10/09/06 19:10, Alex Turner wrote:
> I have a table whose definition is basically
>
> create table foo (
> a int,
> b int,
> c int,
> d date
> );
>
> and when fully populated, select relpages*8192::long/reltuples from
> pg_class
> where relname='foo';
> gives around 52.  Why is it so wide when there are only 4*4=16 bytes of
> actual data?

http://www.postgresql.org/docs/faqs.FAQ.html#item4.5

   23  row header (no OIDs)
+ 16  your row size
+  4  page pointer
   --
   43

I'd guess that the extra 4 bytes is from the null bits, page
overhead, etc.

- --
Ron Johnson, Jr.
Jefferson LA  USA

Is "common sense" really valid?
For example, it is "common sense" to white-power racists that
whites are superior to blacks, and that those with brown skins
are mud people.
However, that "common sense" is obviously wrong.
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