On Wed, Oct 14, 2020 at 10:21:24PM +0800, Julien Rouhaud wrote:
> On Wed, Oct 14, 2020 at 10:09 PM Bruce Momjian <bruce@momjian.us> wrote:
> > > > OK, I came up with the hash idea only to address one of your concerns
> > > > about mismatched hashes for algorithm improvements/changes. Seems we
> > > > might as well just document that cross-version hashes are different.
> > >
> > > Ok, so I tried to implement what seems to be the consensus. First
> > > attached patch moves the current pgss queryid computation in core,
> > > with a new compute_queryid GUC (on/off). One thing I don't really
> >
> > Why would someone turn compute_queryid off? Overhead?
>
> Yes, or possibly to use a different algorithm.
Is there a measureable overhead when this is turned on, since it is off
by default and maybe should default to on.
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EnterpriseDB https://enterprisedb.com
The usefulness of a cup is in its emptiness, Bruce Lee