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Re: tuple data size and compression

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On 12/15/2016 07:17 AM, Tom DalPozzo wrote:
Hi,
it's not clear to me when tuple data (max 1000 bytes total) get
compressed on disk and when not.
I tried with pg_column_size to find the tuple's size but I get ambiguous
results.

What is the table definition?

Maybe this will help?:

https://www.postgresql.org/docs/9.5/static/storage-toast.html

It seems to work but sometimes the tuples seem compressed and sometime not.
I tried both with constant data and random bytes.

Thanks
Pupillo




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Adrian Klaver
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