Horton

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

Bertrand Drouvot <bertranddrouvot.pg@gmail.com>

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From: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
To: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Cc: Amit Kapila <amit.kapila16@gmail.com>, Nathan Bossart <nathandbossart@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2024-03-25T07:35:45Z
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

Hi,

On Mon, Mar 25, 2024 at 12:25:21PM +0530, Bharath Rupireddy wrote:
> On Mon, Mar 25, 2024 at 10:28 AM Amit Kapila <amit.kapila16@gmail.com> wrote:
> >
> > On Mon, Mar 25, 2024 at 9:48 AM Amit Kapila <amit.kapila16@gmail.com> wrote:
> > >
> > >
> > > Such a test looks reasonable but shall we add equal to in the second
> > > part of the test (like '$last_inactive_time'::timestamptz >=
> > > > '$slot_creation_time'::timestamptz;). This is just to be sure that even if the test ran fast enough to give the same time, the test shouldn't fail. I think it won't matter for correctness as well.
> 
> Agree. I added that in v19 patch. I was having that concern in my
> mind. That's the reason I wasn't capturing current_time something like
> below for the same worry that current_timestamp might be the same (or
> nearly the same) as the slot creation time. That's why I ended up
> capturing current_timestamp in a separate query than clubbing it up
> with pg_create_physical_replication_slot.
> 
> SELECT current_timestamp FROM pg_create_physical_replication_slot('foo');
> 
> > Apart from this, I have made minor changes in the comments. See and
> > let me know what you think of attached.
> 

Thanks!

v19-0001 LGTM, just one Nit comment for 019_replslot_limit.pl:

The code for "Get last_inactive_time value after the slot's creation" and 
"Check that the captured time is sane" is somehow duplicated: is it worth creating
2 functions?

Regards,

-- 
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
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