Re: Proposal: vacuum and autovacuum parameters to control freezing

"Simon Riggs" <simon@2ndquadrant.com> writes:

> vacuum_freeze_min    The latest TransactionId that will be "frozen" during
> a VACUUM is calculated by CurrentTransactionId - vacuum_freeze_min.
>
> vacuum_freeze_max
> The maximum age, calculated as distance from CurrentTransactionId, that
> will be allowed before a autovacuum will be forced for that database
> object.

I think it's clearer if "min" and "max" are considered adjectives and always
have a subject they modify. Otherwise it's unclear what they refer to.

So "vacuum_freeze_min_age" and "vacuum_freeze_max_age" instead. 

That way it's unambiguous which is which. Ie, that it's minimum and maximum
age and not minimum and maximum transaction id which would be the other way
around.

--  Gregory Stark EnterpriseDB          http://www.enterprisedb.com