Re: When do vacuumed pages/tuples become available for reuse?

On 4/11/19 12:24 PM, Tom Lane wrote:
> Alvaro Herrera <alvherre@2ndquadrant.com> writes:
>> On 2019-Apr-11, rihad wrote:
>>> 2019-04-11 19:39:44.450844500   tuples: 19150 removed, 2725811 remain, 465 are dead but not yet removable
>> What Jeff said.  This vacuum spent a lot of time, only to remove miserly
>> 19k tuples, but 2.7M dead tuples remained ... probably because you have
>> long-running transactions preventing vacuum from removing them.
> I think you misread it --- I'm pretty sure "N remain" is referring
> to live tuples.

Because "465 are dead but not yet removable" are the dead tuples that remain 
instead of 2.7M?

>    Maybe we should adjust the wording to make that
> clearer?
>
>             regards, tom lane

-- 
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