Re: [PATCH] V3: Idle in transaction cancellation

Andres Freund <andres@anarazel.de> wrote:
> I will try to read the thread and make a proposal for a more
> carefull implementation - just not today... I think the results
> would be interesting...
FWIW, the SSI patch that Dan and I are working on can't have a
guarantee that it is immediately safe to retry a transaction which
rolls back with a serialization failure (without potentially failing
again on exactly the same set of transactions) unless there is a
capability such as this "Idle in transaction cancellation" patch
would provide.  Safe immediate retry would be a nice guarantee for
SSI to provide.
That being the case, we may not be able to generate the final form
of the SSI patch until a patch for this issue is applied.  Obviously
I know that nobody is in a position to make any promises on this,
but I just thought I'd let people know that this issue could
possibly be on the critical path to a timely release -- at least if
that release will include SSI with the safe retry guarantee.  (At
least when I'm planning for a release, I like to know such
things....)
-Kevin