Re: Auto Vacuum

Bruce Momjian wrote:

>Matthew T. O'Connor wrote:
>  
>
>>Bruce Momjian wrote:
>>    
>>
>>>I have added an auto-vacuum TODO item:
>>>
>>>* Auto-vacuum
>>>       o Move into the backend code
>>>       o Scan the buffer cache to find free space or use background writer
>>>       o Use free-space map information to guide refilling
>>>      
>>>
>>I'm not sure what you mean exactly by "Scan the buffer cache to find 
>>free space or use background writer", the other two are definitely high 
>>priority todo items (at least as far as autovacuum in concerned).
>>    
>>
>
>I am thinking we could look for expired tuples when while they are in
>the buffer cache or before they are written to disk so we don't have to
>a sequential scan to find them.
>  
>
Is that related to autovacuum? Or is that a potential feature inside the 
actual vacuum command?