Horton

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

Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>

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From: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
To: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Cc: Amit Kapila <amit.kapila16@gmail.com>, Nathan Bossart <nathandbossart@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2024-03-12T15:49:35Z
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 Tue, Mar 12, 2024 at 9:11 PM Bertrand Drouvot
<bertranddrouvot.pg@gmail.com> wrote:
>
> > AFAIR, we don't prevent similar invalidations due to
> > 'max_slot_wal_keep_size' for sync slots,
>
> Right, we'd invalidate them on the standby should the standby sync slot restart_lsn
> exceeds the limit.

Right. Help me understand this a bit - is the wal_removed invalidation
going to conflict with recovery on the standby?

Per the discussion upthread, I'm trying to understand what
invalidation reasons will exactly cause conflict with recovery? Is it
just rows_removed and wal_level_insufficient invalidations? My
understanding on the conflict with recovery and invalidation reason
has been a bit off track. Perhaps, we need to clarify these two things
in the docs for the end users as well?

-- 
Bharath Rupireddy
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com