On 29/05/2026 15:48, Robert Haas wrote:
On Thu, May 28, 2026 at 7:19 PM Michael Paquier <[email protected]> wrote:
On Thu, May 28, 2026 at 08:40:39AM -0400, Robert Haas wrote:
After reading this email, the linked-to email, and the commit message
for the patch, I still don't have a clear understanding of what this
is intended to fix. It seems like it's going to make the
responsiveness worse. In general, we want to replace escalating wait
loops with things that wake up instantly at the right time, and this
is going in the opposite direction.
This is an exchange between responsiveness of the system and
flexibility. I have had two complaints in the past about the fact
that the waits and wakeups were not doable due to the fact that we
rely on condition variables and latches:
I'm still struggling to understand. Condition variables and latches
are both designed to allow for nice waits and wakeups.
They only work after you have a PGPROC slot. If you want to inject code
to authentication, or into postmaster, you cannot use them.
- Heikki
