| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: brin autosummarization -- autovacuum "work items" |
| Date: | 2017-04-01 17:06:01 |
| Message-ID: | 20170401170601.jpqar6gzw42uzhql@alvherre.pgsql |
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| Lists: | pgsql-hackers |
Robert Haas wrote:
> On Tue, Mar 21, 2017 at 4:10 PM, Alvaro Herrera
> <alvherre(at)2ndquadrant(dot)com> wrote:
> > Well, the number of work items is currently fixed; but if you have many
> > BRIN indexes, then you'd overflow (lose requests). By using DSA I am
> > making it easy to patch this afterwards so that an arbitrary number of
> > requests can be recorded.
>
> But that could also use an arbitrarily large amount of memory, and any
> leaks will be cluster-lifespan.
Good point -- probably not such a great idea as presented. The patch
only uses a fixed amount of memory currently, so it should be fine on
that front. I think this is a good enough start.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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