Re: Auto Vacuum

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.

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