Hashjoin fall back to block nested hashloop join

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Title

Topic

Performance

Created

2020-06-09 20:37:18

Last modified

2020-11-10 21:44:17 (3 years, 10 months ago)

Latest email

2020-09-24 03:39:46 (3 years, 11 months ago)

Status

2020-11: Withdrawn

2020-09: Moved to next CF

2020-07: Moved to next CF

Target version

Authors

Melanie Plageman (melanieplageman), Soumyadeep Chakraborty (soumyadeep2007), Jesse Zhang (essej), David Kimura (dgkimura)

Reviewers

Thomas Munro (macdice)Become reviewer

Committer

Links

Wiki Git

Emails

Avoiding hash join batch explosions with extreme skew and weird stats: First at 2019-05-16 01:22:31 by Thomas Munro <thomas.munro at gmail.com>
Latest at 2020-09-24 03:39:46 by Michael Paquier <michael at paquier.xyz>
Latest attachment (v11-0001-Implement-Adaptive-Hashjoin.patch) at 2020-08-31 22:13:06 from Melanie Plageman <melanieplageman at gmail.com>
    Attachment (v11-0001-Implement-Adaptive-Hashjoin.patch) at 2020-08-31 22:13:06 from Melanie Plageman <melanieplageman at gmail.com> (Patch: No)
    Attachment (v10-0001-Implement-Adaptive-Hashjoin.patch) at 2020-06-25 22:09:44 from Melanie Plageman <melanieplageman at gmail.com> (Patch: No)
    Attachment (v9-0001-Implement-Adaptive-Hashjoin.patch) at 2020-06-09 00:12:25 from Melanie Plageman <melanieplageman at gmail.com> (Patch: No)
    Attachment (v8-0001-Implement-Adaptive-Hashjoin.patch) at 2020-05-28 02:25:50 from Melanie Plageman <melanieplageman at gmail.com> (Patch: No)
    Attachment (v7-0002-Provisionally-detach-unless-last-worker.patch) at 2020-05-09 01:58:10 from Melanie Plageman <melanieplageman at gmail.com> (Patch: Yes)
    Attachment (v6-0002-Implement-fallback-of-batch-0-for-serial-adaptive.patch) at 2020-05-04 20:39:36 from David Kimura <david.g.kimura at gmail.com> (Patch: Yes)
    Attachment (v1-0001-Describe-hybrid-hash-join-implementation.patch) at 2020-04-30 14:30:35 from Melanie Plageman <melanieplageman at gmail.com> (Patch: Yes)
    Attachment (v6-0002-Implement-fallback-of-batch-0-for-serial-adaptive.patch) at 2020-04-29 23:44:53 from David Kimura <david.g.kimura at gmail.com> (Patch: Yes)
    Attachment (v6-0001-Implement-Adaptive-Hashjoin.patch) at 2020-04-29 02:03:53 from Melanie Plageman <melanieplageman at gmail.com> (Patch: No)
    Attachment (v5-0002-Fixup-tupleMetadata-struct-issues.patch) at 2020-02-12 00:57:05 from Melanie Plageman <melanieplageman at gmail.com> (Patch: Yes)
    Attachment (v4-0002-Fixup-tupleMetadata-struct-issues.patch) at 2020-01-25 02:22:30 from Melanie Plageman <melanieplageman at gmail.com> (Patch: Yes)
    Attachment (v3-0001-hashloop-fallback.patch) at 2019-12-30 03:34:02 from Melanie Plageman <melanieplageman at gmail.com> (Patch: No)
    Attachment (v3-0001-hashloop-fallback.patch) at 2019-07-30 18:46:59 from Melanie Plageman <melanieplageman at gmail.com> (Patch: Yes)
    Attachment (v2-0001-hashloop-fallback.patch) at 2019-07-03 21:22:09 from Melanie Plageman <melanieplageman at gmail.com> (Patch: Yes)
    Attachment (v1-0001-hashloop-fallback.patch) at 2019-06-18 22:24:08 from Melanie Plageman <melanieplageman at gmail.com> (Patch: Yes)
    Attachment (fix.patch) at 2019-05-16 01:22:31 from Thomas Munro <thomas.munro at gmail.com> (Patch: Yes)

History

When	Who	What
2020-11-10 21:44:17	Melanie Plageman (melanieplageman)	Closed in commitfest 2020-11 with status: Withdrawn
2020-09-30 06:55:35	Michael Paquier (michael-kun)	New status: Waiting on Author
2020-09-30 06:55:27	Michael Paquier (michael-kun)	Closed in commitfest 2020-09 with status: Moved to next CF
2020-09-30 06:55:23	Michael Paquier (michael-kun)	New status: Needs review
2020-09-24 03:38:27	Michael Paquier (michael-kun)	New status: Waiting on Author
2020-08-31 22:55:13	Melanie Plageman (melanieplageman)	Changed authors to Melanie Plageman (melanieplageman), Soumyadeep Chakraborty (soumyadeep2007), Jesse Zhang (essej), David Kimura (dgkimura)
2020-08-31 22:55:13	Melanie Plageman (melanieplageman)	Changed gitlink to https://github.com/melanieplageman/postgres/tree/AHJ_v11
2020-08-02 22:45:05	Daniel Gustafsson (d_gustafsson)	Closed in commitfest 2020-07 with status: Moved to next CF
2020-06-29 01:55:12	Thomas Munro (macdice)	Added macdice as reviewer
2020-06-09 20:39:03	Melanie Plageman (melanieplageman)	Changed authors to Melanie Plageman (melanieplageman), Jesse Zhang (essej), David Kimura (dgkimura)
2020-06-09 20:39:03	Melanie Plageman (melanieplageman)	Changed targetversion to 14
2020-06-09 20:39:03	Melanie Plageman (melanieplageman)	Changed gitlink to https://github.com/melanieplageman/postgres/tree/alternative_AHJ
2020-06-09 20:39:03	Melanie Plageman (melanieplageman)	Changed wikilink to https://wiki.postgresql.org/wiki/Hash_Join
2020-06-09 20:37:19	Melanie Plageman (melanieplageman)	Attached mail thread CA+hUKGKWWmf=WELLG=aUGbcugRaSQbtm0tKYiBut-B2rVKX63g@mail.gmail.com
2020-06-09 20:37:18	Melanie Plageman (melanieplageman)	Created patch record

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