> Read-Only Tables
> ----------------
> Postgres supports the concept of freezing tuples, so they can live
> forever within the database without needing further writes. Currently
> there is no command that will guarantee that a table has been completely
> frozen. This makes it difficult to reliably write data files to WORM
> media for longer term archiving. (WORM means Write-Once, Read-Many).
> It's also a pain having to VACUUM a large table again just because a
> small number of rows need to be frozen.

I'm not an expert at all, but I'd like to understand this, do you plan that 
READ-ONLY tables wouldn't even store transaction information? That should 
save quite a lot of space. Maybe when the table would be moved to the 
compressed tablespace, MVCC information could be dropped too? Of course that 
would avoid future insert & update possibilities though.

Albert Cervera i Areny

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