Re: Vacuum and oldest xmin (again)

>>The problem is fully described in thread I mentioned earlier, Tom's 
>>excellent explanation can be found here:

>>http://groups.google.com/groups?hl=cs&lr=&frame=right&th=5227028cb3449572&seekm=11390.1080964720%40sss.pgh.pa.us#link14
> 
> 
> Oh, that thing.  Well, my opinion has not changed since April --- I
> don't think the problem justifies slowing down every transaction start.

My question was if the slowdown of every transaction start is really 
needed - If it is possible to find some other solution, for example add 
more logic to vacuum to pick up correct txn id (or little bit more 
"correct"). But unfortunately I have no idea how to do this because of 
my limited knowledge of Pg internals, the diffucult part I guess are the 
shared relations...

Kuba