Alexander Lakhin <[email protected]> writes:

I think this can explain slow CommitTransactionCommand() and why it
happens not every time. Regarding other animals, I guess they can
experience the same bumps but not exceeding 5 seconds (50 tries). Thus,
from my understanding, for the failure to happen, we need to have slow
storage and initialize_worker_spi() -> CommitTransactionCommand() reaching
XLogFileClose().

So, it remains not very clear why only widowbird is showing this
failure, but I think we can safely take away the bottom-line
conclusion that hard-wiring a maximum wait of 5s in
CountOtherDBBackends() was not a great idea.