Hello. I made some bugfixes and rewrite the patch.
Simon Riggs писал 2017-09-05 14:44:
As Alexander says, simply skipping truncation if standby is busy isn't a great plan.
If we defer an action on standby replay, when and who will we apply it? What happens if the standby is shutdown or crashes while an action is pending.
After crash standby server will go to the nearest checkout and will replay all his wal`s to reach consistent state and then open for read-only load. (all collected wal`s will be replayed in right way, I meant wal`s that truncates table and wal`s that make table grow)
