Horton

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

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>, Bertrand Drouvot <bertranddrouvot.pg@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2024-03-11T14:13:57Z
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 Mon, Mar 11, 2024 at 04:09:27PM +0530, Amit Kapila wrote:
> I don't see how it will be easier for the user to choose the default
> value of 'max_slot_xid_age' compared to 'max_slot_wal_keep_size'. But,
> I agree similar to 'max_slot_wal_keep_size', 'max_slot_xid_age' can be
> another parameter to allow vacuum to proceed removing the rows which
> otherwise it wouldn't have been as those would be required by some
> slot.

Yeah, the idea is to help prevent transaction ID wraparound, so I would
expect max_slot_xid_age to ordinarily be set relatively high, i.e., 1.5B+.

-- 
Nathan Bossart
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