Re: Adding REPACK [concurrently]

Srinath Reddy Sadipiralla <srinath2133@gmail.com>

From: Srinath Reddy Sadipiralla <srinath2133@gmail.com>
To: Antonin Houska <ah@cybertec.at>
Cc: alvherre@alvh.no-ip.org, Mihail Nikalayeu <mihailnikalayeu@gmail.com>, Pg Hackers <pgsql-hackers@lists.postgresql.org>, Robert Treat <rob@xzilla.net>
Date: 2026-03-26T13:19:53Z
Lists: pgsql-hackers
Hi Antonin,

On Mon, Mar 23, 2026 at 5:30 PM Antonin Houska <ah@cybertec.at> wrote:

>
> I could not resist digging in it deeper :-) Attached is a test that
> reproduces
> the crash - it includes the isolation tester enhancement that I posted
> separately [1]. It crashes reliably with v43 [2] if your fix v43-0005 is
> omitted.
>

+1, i tested the same and yeah it reproduces the crash ,also reviewed
the patch LGTM, except i think you need to add this to makefile, so that a
simple
make check would be enough to run the isolation test, i think this all
makes sense
if this [1] patch goes in.

diff --git a/contrib/test_decoding/Makefile b/contrib/test_decoding/Makefile
index acbcaed2feb..201e3c84cb4 100644
--- a/contrib/test_decoding/Makefile
+++ b/contrib/test_decoding/Makefile
@@ -9,7 +9,10 @@ REGRESS = ddl xact rewrite toast permissions
decoding_in_xact \
 ISOLATION = mxact delayed_startup ondisk_startup concurrent_ddl_dml \
        oldest_xmin snapshot_transfer subxact_without_top concurrent_stream
\
        twophase_snapshot slot_creation_error catalog_change_snapshot \
-       skip_snapshot_restore invalidation_distribution
parallel_session_origin
+       skip_snapshot_restore invalidation_distribution
parallel_session_origin \
+       filtering
+
+EXTRA_INSTALL = src/test/modules/injection_points

 REGRESS_OPTS = --temp-config
$(top_srcdir)/contrib/test_decoding/logical.conf
 ISOLATION_OPTS = --temp-config
$(top_srcdir)/contrib/test_decoding/logical.conf

[1] - https://www.postgresql.org/message-id/flat/4703.1774250534%40localhost


-- 
Thanks,
Srinath Reddy Sadipiralla
EDB: https://www.enterprisedb.com/

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →
  1. Allow old WAL recycling during REPACK CONCURRENTLY

  2. Advance restart_lsn more eagerly in LogicalConfirmReceivedLocation

  3. Remove unnecessary signal handler change

  4. Improve REPACK (CONCURRENTLY) error messages some more

  5. Revert "Allow logical replication snapshots to be database-specific"

  6. Move REPACK (CONCURRENTLY) test out of stock regression tests

  7. REPACK: do not require REPLICATION or LOGIN

  8. Add missing initialization

  9. Simplify declaration of memcpy target

  10. Reserve replication slots specifically for REPACK

  11. doc: Add an example of REPACK (CONCURRENTLY)

  12. Allow logical replication snapshots to be database-specific

  13. Avoid different-size pointer-to-integer cast

  14. Fix valgrind failure

  15. Add CONCURRENTLY option to REPACK

  16. Rename cluster.c to repack.c (and corresponding .h)

  17. Allow index_create to suppress index_build progress reporting

  18. Make index_concurrently_create_copy more general

  19. Document the 'command' column of pg_stat_progress_repack

  20. Introduce the REPACK command

  21. Toggle logical decoding dynamically based on logical slot presence.

  22. Split vacuumdb to create vacuuming.c/h

  23. Remove ReorderBufferTupleBuf structure.

  24. Revert changes to CONCURRENTLY that "sped up" Xmin advance

  25. VACUUM: ignore indexing operations with CONCURRENTLY