Heikki Linnakangas <heikki.linnakangas@enterprisedb.com> writes:
> When the startup process wakes up after sleep to replay WAL, it does
> replay all the WAL streamed that far. And if more WAL if streamed during
> the replay, it's replayed too before the next sleep. But when it does
> reach the end of already-streamed WAL, it sleeps for 100ms, and doesn't
> wake up earlier if a WAL record arrives during the sleep.
Thanks for the clear picture. It then works the same as PGQ based
consumers, including londiste. I'm now happy ☻
> So, it does increase the lag artificially, but it will keep up with the
> volume just fine.
Great. No further complain from me there. I guess it now entirely
depends on how easy it is to wake up before the end of the 100ms: it
might be that it's easier to code the signaling than to add a GUC for
the value?
Regards,
--
dim