| From: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
|---|---|
| To: | David Gould <daveg(at)sonic(dot)net> |
| Cc: | pgsql-bugs(at)lists(dot)postgresql(dot)org, Alina Alexeeva <alexeeva(at)adobe(dot)com>, Rajesh Bhatia <rajbhati(at)adobe(dot)com>, Arvind Kota <akota(at)adobe(dot)com>, Jothikanth R <jothikanth(dot)r(at)efrontier(dot)com>, Ullas Lakkur Raghavendra <lakkurra(at)adobe(dot)com> |
| Subject: | Re: BUG #15005: ANALYZE can make pg_class.reltuples inaccurate. |
| Date: | 2018-01-11 14:39:22 |
| Message-ID: | 20180111143922.evxiss5q2n4ug74a@alvherre.pgsql |
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| Thread: | |
| Lists: | pgsql-bugs |
David Gould wrote:
> I've tracked down how this happens and created a reproduction script and a
> patch. Attached:
>
> - vac_estimate_reltuples.patch Patch against master
> - README.txt Instructions for testing
> - reltuples_analyze_bug.sql Reproduction script
> - analyze_counts.awk Helper for viewing results of test
> - test_standard.txt Test output for unpatched postgresql 10.1
> - test_patched.txt Test output with patch
Great work. Please make sure to register this as a bug fix in the
next commitfest.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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