tuple data size and compression

[Tom DalPozzo <t.dalpozzo@xxxxxxxxx>]

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.

It seems to work but sometimes the tuples seem compressed and sometime not.

I tried both with constant data and random bytes.

Thanks

Pupillo