Tom, Paolo,
> 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.
I would like to see some checking of this, though. Currently I'm doing
testing of PostgreSQL under very large numbers of connections (2000+) and am
finding that there's a huge volume of xlog output ... far more than
comparable RDBMSes. So I think we are logging stuff we don't really have
to.
--
Josh Berkus
PostgreSQL @ Sun
San Francisco
