Proposal- GUC for max dead rows before autovacuum

On Tue, 2019-11-19 at 15:35 -0700, Michael Lewis wrote:

To mitigate the need for per-table tuning of autovacuum configuration, I'd like to propose a new GUC for autovacuum_vacuum_threshold_max.

Currently, it seems that I can either set autovacuum_vacuum_scale_factor much smaller than default on tables with millions of rows,
or set a value globally that means small tables are auto vacuumed rarely.

The default value for this new setting value could be -1 or 0 to disable the feature, or something like 100,000 perhaps
so that tables with more than 500,0000 tuples are candidates for an autovacuum before they would with current default values.

I think this is unnecessary.
Usually you have problems only with a few tables, and it is no problem
to set autovacuum parameters on these individually.

Yours,
Laurenz Albe