Horton

Re: Introduce XID age and inactive timeout based replication slot invalidation

Amit Kapila <amit.kapila16@gmail.com>

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From: Amit Kapila <amit.kapila16@gmail.com>
To: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Cc: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>, shveta malik <shveta.malik@gmail.com>, Nathan Bossart <nathandbossart@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2024-03-27T04:52:30Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Add a test for commit ac0e33136a using the injection point.

  2. Invalidate inactive replication slots.

  3. Fix incorrect slot type in BuildTupleHashTableExt

  4. Allow synced slots to have their inactive_since.

  5. Change last_inactive_time to inactive_since in pg_replication_slots.

  6. Track last_inactive_time in pg_replication_slots.

  7. Track invalidation_reason in pg_replication_slots.

  8. Add option force_initdb to PostgreSQL::Test::Cluster:init()

  9. Add a failover option to subscriptions.

  10. Allow setting failover property in the replication command.

  11. Allow to enable failover property for replication slots via SQL API.

  12. Track conflict_reason in pg_replication_slots.

  13. Log messages for replication slot acquisition and release.

  14. Remove vacuum_defer_cleanup_age

  15. Fix corruption due to vacuum_defer_cleanup_age underflowing 64bit xids

  16. meson: Add initial version of meson based build system

On Wed, Mar 27, 2024 at 10:08 AM Bharath Rupireddy
<bharath.rupireddyforpostgres@gmail.com> wrote:
>
> On Tue, Mar 26, 2024 at 11:22 PM Bertrand Drouvot
> <bertranddrouvot.pg@gmail.com> wrote:
>
> > 3)
> > update_synced_slots_inactive_time():
> >
> > This assert is removed, is it intentional?
> > Assert(s->active_pid == 0);
>
> Yes, the slot can get acquired in the corner case when someone runs
> pg_sync_replication_slots concurrently at this time. I'm referring to
> the issue reported upthread. We don't prevent one running
> pg_sync_replication_slots in promotion/ShutDownSlotSync phase right?
> Maybe we should prevent that otherwise some of the slots are synced
> and the standby gets promoted while others are yet-to-be-synced.
>

We should do something about it but that shouldn't be done in this
patch. We can handle it separately and then add such an assert.

-- 
With Regards,
Amit Kapila.