Horton

RE: [PoC] pg_upgrade: allow to upgrade publisher node

Hayato Kuroda (Fujitsu) <kuroda.hayato@fujitsu.com>

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From: "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>
To: 'Amit Kapila' <amit.kapila16@gmail.com>, Peter Smith <smithpb2250@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Bruce Momjian <bruce@momjian.us>, Julien Rouhaud <rjuju123@gmail.com>, vignesh C <vignesh21@gmail.com>, Masahiko Sawada <sawada.mshk@gmail.com>, "Zhijie Hou (Fujitsu)" <houzj.fnst@fujitsu.com>
Date: 2023-09-01T04:47:19Z
Lists: pgsql-hackers 
Dear Amit,

Thank you for giving suggestions! I think your fixes are good.
New patch set can be available in [1].

> Apart from this, I have addressed some of the comments raised by you
> for the 0003 patch. Please find the diff patch attached. I think we
> should combine 0002 and 0003 patches.

Yeah, combined.

> I have another comment on the patch:
> + /* Check there are no logical replication slots with a 'lost' state. */
> + res = executeQueryOrDie(conn,
> + "SELECT slot_name FROM pg_catalog.pg_replication_slots "
> + "WHERE wal_status = 'lost' AND "
> + "temporary IS FALSE;");
> 
> In this place, shouldn't we explicitly check for slot_type as logical?
> I think we should consistently check for slot_type in all the queries
> used in this patch.

Seems right, the condition was added to all the place.

[1]: https://www.postgresql.org/message-id/TYAPR01MB5866CDC13CA9D6B9F4451606F5E4A%40TYAPR01MB5866.jpnprd01.prod.outlook.com


Best Regards,
Hayato Kuroda
FUJITSU LIMITED

Commits

  1. Fix issues in binary_upgrade_logical_slot_has_caught_up().

  2. Fix a random failure in 003_logical_slots.pl.

  3. Fix a test in 003_logical_slots.

  4. Fix uninitialized slot array access during the upgrade.

  5. Fix the test 003_logical_slots.

  6. Commit b195e6d482 forgot to update meson.build.

  7. Use shorter file names in the upgrade logical slots test.

  8. Migrate logical slots to the new node during an upgrade.

  9. Flush logical slots to disk during a shutdown checkpoint if required.

  10. Prevent possibility of panics during shutdown checkpoint.