Re: MultiXacts & WAL

Heikki Linnakangas <hlinnaka@iki.fi> writes:
> Also, multixacts are only used when two transactions hold a shared lock 
> on the same row.

Yeah, it's difficult to believe that multixact stuff could form a
noticeable fraction of the total WAL load, except perhaps under really
pathological circumstances, because the code just isn't supposed to be
exercised often.  So I don't think this is worth pursuing.  Paolo's free
to try to prove the opposite of course ... but I'd want to see numbers
not speculation.
        regards, tom lane