| From: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
|---|---|
| To: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Stephen Frost <sfrost(at)snowman(dot)net>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Parallel Aggregates for string_agg and array_agg |
| Date: | 2018-03-27 00:26:17 |
| Message-ID: | 20180327002617.fjgkgxmeojfkti7b@alvherre.pgsql |
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| Lists: | pgsql-hackers |
David Rowley wrote:
> Anyway, the options are not zero for anyone who is strongly affected
> with no other workaround. They just need to disable parallel query,
> which to me seems fairly similar to the 8.4 release note's "the
> previous behavior can be restored by disabling enable_hashagg"
synchronized_seqscans is another piece of precedent in the area, FWIW.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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