On Fri, Apr 3, 2020 at 4:18 PM Peter Geoghegan <pg@bowt.ie> wrote:
> OTOH, I wonder if it's possible that vacuum_defer_cleanup_age was
> deliberately intended to affect the behavior of
> XLogWalRcvSendHSFeedback(), which is probably one of the most common
> reasons why GetOldestXmin() is called on standbys.
Pressed "send" too soon. vacuum_defer_cleanup_age *doesn't* get
applied when recovery is in progress, so that definitely can't be
true.
Another hint that vacuum_defer_cleanup_age is only really supposed to
be used on the primary is the fact that it appears under "18.6.1.
Master Server" in the 9.1 docs.
--
Peter Geoghegan