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Re: array_agg() on a set larger than some arbitrary(?) limit causes runaway memory usage and eventually memory exhaustion - Mailing list pgsql-bugs

From Tomas Vondra
Subject Re: array_agg() on a set larger than some arbitrary(?) limit causes runaway memory usage and eventually memory exhaustion
Date
Msg-id c1b68cb9c6007d7fd7bcdbce3e8a9983.squirrel@sq.gransy.com
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In response to Re: array_agg() on a set larger than some arbitrary(?) limit causes runaway memory usage and eventually memory exhaustion  (Frank van Vugt <ftm.van.vugt@foxi.nl>)
Responses Re: array_agg() on a set larger than some arbitrary(?) limit causes runaway memory usage and eventually memory exhaustion
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On 20 Říjen 2013, 10:26, Frank van Vugt wrote:
>
> I never ran into this earlier (and I've been using PostgreSQL for quite
> some
> time now) and even now, this is not about a 'production query', so I'm
> happy
> with any and all benefits for future versions that come from this ;)
>
> Having said that, should you want me to check the effects of some patch,
> just
> let me know, I'd be happy to do that.

Attached is a quick patch removing the local memory context and using
aggcontext instead. I've also tuned down the preallocation. It's against
9.2 stable, so it should apply fine against your 9.2.4. But be careful,
it's not really tested.

Tomas
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