On Wed, Mar 11, 2020 at 10:32:47AM +1300, David Rowley wrote:
> 2. The new feature can be completely disabled. This might be very
> useful for people who suffer from auto-vacuum starvation.

On Thu, Mar 12, 2020 at 08:28:05PM +1300, David Rowley wrote:
> Yes, but in particular so it can be completely disabled easily.

How is it disabled ?  By setting scale_factor=100 ?

+               {                                                               
                                                                                
                       
+                       "autovacuum_vacuum_insert_scale_factor",                
                                                                                
                       
+                       "Number of tuple inserts prior to vacuum as a fraction 
of reltuples",                                                                  
                        
+                       RELOPT_KIND_HEAP | RELOPT_KIND_TOAST,                   
                                                                                
                       
+                       ShareUpdateExclusiveLock                                
                                                                                
                       
+               },                                                              
                                                                                
                       
+               -1, 0.0, 100.0                                                  
                                                                                
                       

Note, vacuum_cleanup_index_scale_factor uses max: 1e10
See 4d54543efa5eb074ead4d0fadb2af4161c943044

-- 
Justin


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