Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop

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От
Andres Freund
Тема
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop
Дата
Msg-id
20180130193453.gprzxco2almo5lpk@alap3.anarazel.de
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BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infiniteloop tcook@blackducksoftware.com
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Thomas Munro <thomas.munro@enterprisedb.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Greg Stark <stark@mit.edu>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Stephen Frost <sfrost@snowman.net>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Andres Freund <andres@anarazel.de>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in an infinite loop Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Thomas Munro <thomas.munro@enterprisedb.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop Tomas Vondra <tomas.vondra@2ndquadrant.com>
Re: BUG #14932: SELECT DISTINCT val FROM table gets stuck in aninfinite loop "Todd A. Cook" <tcook@blackducksoftware.com>
Re: BUG #14891: Old cancel request presented by pgbouncer honoredafter skipping a query. Skarsol <postgresql@skarsol.com>
On 2018-01-30 13:57:44 -0500, Todd A. Cook wrote:
> Out of curiosity, I then modified hashint8() as previously described.
> With that change, run time dropped to 11 minutes (also average of 3
> runs).
> 
> FWIW, the data values in these sets are sort-of random (where I can't
> explain the "sort-of" in a public forum), but strongly biased towards
> negative infinity.  Starting again from scratch, we could probably remove
> the bias, but we have 28-30 billion of these things collected over the
> last 14 years (starting in PostgreSQL 7.4) and it's kinda tough to change
> directions at this point...

FWIW, you could just create a different hash opclass and use it for
those queries...

Greetings,

Andres Freund

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