Horton

Re: PG 14 release notes, first draft

Peter Geoghegan <pg@bowt.ie>

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From: Peter Geoghegan <pg@bowt.ie>
To: Matthias van de Meent <boekewurm+postgres@gmail.com>
Cc: Bruce Momjian <bruce@momjian.us>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2021-05-10T14:54:24Z
Lists: pgsql-hackers 
On Mon, May 10, 2021 at 4:44 AM Matthias van de Meent
<boekewurm+postgres@gmail.com> wrote:
> I noticed that the improvement in bloat control in the HeapAM that I
> know of (3c3b8a4b, 0ff8bbde) weren't documented here. Although each
> can be considered minor, they together can decrease the bloating
> behaviour of certain workloads significantly (and limit the total
> damage), and in my opinion this should be mentioned.
>
> 3c3b8a4b: Returns space claimed for the line pointer array back to the
> page's empty space, so that it can also be used for tuple data.
>
> 0ff8bbde: Allows large tuples to be inserted on pages which have only
> a small amount of data, regardless of fillfactor.

+1 on mentioning both things.

-- 
Peter Geoghegan

Commits

  1. doc: add mention of +4GB windows file handling in PG14 relnotes

  2. doc: PG 14 relnotes fixes

  3. doc: PG 14 relnote updates

  4. doc: PG 14 relnotes, adjust pg_{read|write}_all_data entry

  5. Update PG 14 relnotes for vacuum_cost_page_miss

  6. doc: update PG 14 release notes with recent feedback

  7. Update replication statistics after every stream/spill.

  8. Add information of total data processed to replication slot stats.

  9. Use NameData datatype for slotname in stats.

  10. Add back vacuum_cleanup_index_scale_factor parameter.

  11. Don't consider newly inserted tuples in nbtree VACUUM.

  12. pgbench: Improve time logic.

  13. Track total amounts of times spent writing and syncing WAL data to disk.

  14. Allow decoding at prepare time in ReorderBuffer.

  15. Extend the output plugin API to allow decoding of prepared xacts.

  16. Fix nbtree cleanup-only VACUUM stats inaccuracies.

  17. Execute invalidation messages for each XLOG_XACT_INVALIDATIONS message

  18. Fix our Windows stat() emulation to handle file sizes > 4GB.

  19. Trigger autovacuum based on number of INSERTs

  20. Speed up planning when partitions can be pruned at plan time.

  21. Remove support for password_encryption='off' / 'plain'.

  22. Increase work_mem and maintenance_work_mem defaults by 4x