digoal
2024-03-30
PostgreSQL , PolarDB , DuckDB , slot , pg_replication_slots , 无效时间 , inactive_since
跟踪PostgreSQL slot断连时的时间戳.
Track last_inactive_time in pg_replication_slots.
author Amit Kapila <akapila@postgresql.org>
Mon, 25 Mar 2024 11:04:33 +0000 (16:34 +0530)
committer Amit Kapila <akapila@postgresql.org>
Mon, 25 Mar 2024 11:04:33 +0000 (16:34 +0530)
commit a11f330b5584f2430371d68871e00f5c63735299
tree b53cafab5f97bb5440db906e20ca0f38e46a0fd9 tree
parent 0f7863afef67e462574fe5af6317e26a2f2d47fb commit | diff
Track last_inactive_time in pg_replication_slots.
This commit adds a new property called last_inactive_time for slots. It is
set to 0 whenever a slot is made active/acquired and set to the current
timestamp whenever the slot is inactive/released or restored from the disk.
Note that we don't set the last_inactive_time for the slots currently being
synced from the primary to the standby because such slots are typically
inactive as decoding is not allowed on those.
The 'last_inactive_time' will be useful on production servers to debug and
analyze inactive replication slots. It will also help to know the lifetime
of a replication slot - one can know how long a streaming standby, logical
subscriber, or replication slot consumer is down.
The 'last_inactive_time' will also be useful to implement inactive
timeout-based replication slot invalidation in a future commit.
Author: Bharath Rupireddy
Reviewed-by: Bertrand Drouvot, Amit Kapila, Shveta Malik
Discussion: https://www.postgresql.org/message-id/CALj2ACW4aUe-_uFQOjdWCEN-xXoLGhmvRFnL8SNw_TZ5nJe+aw@mail.gmail.com
Change last_inactive_time to inactive_since in pg_replication_slots.
author Amit Kapila <akapila@postgresql.org>
Wed, 27 Mar 2024 03:57:44 +0000 (09:27 +0530)
committer Amit Kapila <akapila@postgresql.org>
Wed, 27 Mar 2024 03:57:44 +0000 (09:27 +0530)
commit 6d49c8d4b4f4a20eb5b4c501d78cf894fa13c0ea
tree 67eaaf5d79dea7aede098b19222897923894be78 tree
parent bb952c8c8b13279eca039499249cb5dc60991603 commit | diff
Change last_inactive_time to inactive_since in pg_replication_slots.
Commit a11f330b55 added last_inactive_time to show the last time the slot
was inactive. But, it tells the last time that a currently-inactive slot
previously *WAS* active. This could be unclear, so we changed the name to
inactive_since.
Reported-by: Robert Haas
Author: Bharath Rupireddy
Reviewed-by: Bertrand Drouvot, Shveta Malik, Amit Kapila
Discussion: https://postgr.es/m/CA+Tgmob_Ta-t2ty8QrKHBGnNLrf4ZYcwhGHGFsuUoFrAEDw4sA@mail.gmail.com
Discussion: https://postgr.es/m/CALj2ACUXS0SfbHzsX8bqo+7CZhocsV52Kiu7OWGb5HVPAmJqnA@mail.gmail.com
