| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Peter Geoghegan <pg(at)bowt(dot)ie> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, David Rowley <dgrowleyml(at)gmail(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Andres Freund <andres(at)anarazel(dot)de>, Bruce Momjian <bruce(at)momjian(dot)us>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, Melanie Plageman <melanieplageman(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Default setting for enable_hashagg_disk |
| Date: | 2020-07-25 16:38:03 |
| Message-ID: | da1c96f1b16ae6b36cb5325396dfb901a5f6d3e6.camel@j-davis.com |
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| Lists: | pgsql-docs pgsql-hackers |
On Fri, 2020-07-24 at 21:16 +0200, Tomas Vondra wrote:
> Surely more recursive spilling should do more I/O, but the Disk Usage
> reported by explain analyze does not show anything like ...
I suspect that's because of disk reuse in logtape.c.
Regards,
Jeff Davis
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