Re: [HACKERS] Re: Performance problem partially identified

Tom Lane wrote:
> 
> Further info:
> 
> I think this behavior may be state-dependent.  The first update after
> loading the table rewrites all the blocks, but subsequent ones do not.
> Is it just a matter of marking recently-written tuples as confirmed
> good?  If so, then there is not a problem (or at least, not as big
> a problem as I thought).

Exactly!

One have to run vacuum after loading a big amount of data.

Vadim