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

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.  Maybe
that was pg_dump.

I suspect what you really need is keep an eye on the age of your oldest
transactions.  Don't leave anything "idle in transaction".

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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