]> git.ipfire.org Git - thirdparty/postgresql.git/commit
Refresh apply delay on reload of recovery_min_apply_delay at recovery
authorMichael Paquier <michael@paquier.xyz>
Mon, 16 Aug 2021 03:11:49 +0000 (12:11 +0900)
committerMichael Paquier <michael@paquier.xyz>
Mon, 16 Aug 2021 03:11:49 +0000 (12:11 +0900)
commitf83d80ea1e57927471848d901843ddc6fd5ecacc
tree28a0283772ad61f4988352007ccdd51590cec612
parent4ffbd55d9346b6a8ba391c6df9a0f692c4b61ace
Refresh apply delay on reload of recovery_min_apply_delay at recovery

This commit ensures that the wait interval in the replay delay loop
waiting for an amount of time defined by recovery_min_apply_delay is
correctly handled on reload, recalculating the delay if this GUC value
is updated, based on the timestamp of the commit record being replayed.

The previous behavior would be problematic for example with replay
still waiting even if the delay got reduced or just cancelled.  If the
apply delay was increased to a larger value, the wait would have just
respected the old value set, finishing earlier.

Author: Soumyadeep Chakraborty, Ashwin Agrawal
Reviewed-by: Kyotaro Horiguchi, Michael Paquier
Discussion: https://postgr.es/m/CAE-ML+93zfr-HLN8OuxF0BjpWJ17O5dv1eMvSE5jsj9jpnAXZA@mail.gmail.com
Backpatch-through: 9.6
src/backend/access/transam/xlog.c