Horton

Re: [Sender Address Forgery]Re: Postgres 11 release notes

Bruce Momjian <bruce@momjian.us>

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From: Bruce Momjian <bruce@momjian.us>
To: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>
Cc: Amit Langote <amitlangote09@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2018-05-23T01:36:52Z
Lists: pgsql-hackers 
On Wed, May 23, 2018 at 10:28:41AM +0900, Amit Langote wrote:
> > Uh, we already have this in the release notes:
> > 
> >         Allow faster partition elimination during query processing (Amit
> >         Langote, David Rowley, Dilip Kumar)
> > 
> >         This speeds access to partitioned tables with many partitions.
> > 
> > Do you want me to add the git commit hash to this release note entry?
> 
> I suppose you meant the above as an entry for performance improvement of
> partition "pruning".  The commit I quoted is concerned with making "tuple
> routing" a bit faster, but as David said that's not making it as fast as
> it could really be.  So, we should hold off from touting it as an
> improvement at this point and I have to agree.  Sorry for the noise.

OK, no problem.  So _finding_ the rows is faster, but adding rows to
partitioned tables with many partitions is still slow, got it.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I.  As I am, so you will be. +
+                      Ancient Roman grave inscription +

Commits

  1. doc: update PG 11 release notes

  2. Fix misspelled pg_trgm contrib name in PostgreSQL 11 release notes

  3. Doc: clarify release note text about v11's new window function features.

  4. Improve wording of release notes item

  5. Fix typos in release notes

  6. Doc: preliminary list of PG11 major features.

  7. Make numeric power() handle NaNs according to the modern POSIX spec.

  8. Various improvements of skipping index scan during vacuum technics

  9. Revert back-branch changes in power()'s behavior for NaN inputs.

  10. Avoid wrong results for power() with NaN input on more platforms.

  11. Avoid wrong results for power() with NaN input on some platforms.

  12. Skip full index scan during cleanup of B-tree indexes when possible

  13. Rewrite the code that applies scan/join targets to paths.

  14. Postpone generate_gather_paths for topmost scan/join rel.

  15. Add casts from jsonb

  16. Make plpgsql use its DTYPE_REC code paths for composite-type variables.

  17. Don't allow VACUUM VERBOSE ANALYZE VERBOSE.

  18. Pass InitPlan values to workers via Gather (Merge).

  19. Account for the effect of lossy pages when costing bitmap scans.

  20. Allow no-op GiST support functions to be omitted.

  21. Rearm statement_timeout after each executed query.

  22. Push limit through subqueries to underlying sort, where possible.