Re: Autovacuum on by default?

Alvaro Herrera wrote:
> Matthew T. O'Connor wrote:
>   
>> I assume you are suggesting that the base value be 0?  Well for one 
>> thing if the table doesn't have any rows that will result in constant 
>> vacuuming of that table, so it needs to be greater than 0.  For a small 
>> table, say 100 rows, there usually isn'tn much performance impact if the 
>> table if 50% dead space, so I think the base values you suggest are OK, 
>> but they shouldn't be 0.
>>     
>
> Actually Tom suggested some time ago that we should get rid of the base
> value completely, i.e. make it 0 forever.
>
> A row with 0 tables would not show any activity in pgstats, so it would
> not be vacuumed constantly.  Only once after it's truncated.

OK, forgot that.  Well I put it in originally as a way to give more 
flexability to the calculation, if I want a tabled vacuumed every 100 
updates, then I can set the scaling factor to 0 and the base value to 
100, but maybe that's not really needed.  It would simplify things if we 
got rid of it.