| From: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Jeff Davis <pgsql(at)j-davis(dot)com> |
| Subject: | Re: Spilling hashed SetOps and aggregates to disk |
| Date: | 2018-06-05 12:53:42 |
| Message-ID: | CAKJS1f94FsCbV0fqvT-tTP4F50JG0uVN7-+rZ1ddwunn7qU9Qw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 6 June 2018 at 00:45, Andres Freund <andres(at)anarazel(dot)de> wrote:
> On 2018-06-05 09:35:13 +0200, Tomas Vondra wrote:
>> I wonder if an aggregate might use a custom context
>> internally (I don't recall anything like that). The accounting capability
>> seems potentially useful for other places, and those might not use AllocSet
>> (or at least not directly).
>
> Yea, that seems like a big issue.
Unfortunately, at least one of the built-in ones do. See initArrayResultArr.
--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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