Re: where does postgres keep the query result until it is returned?

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От Sandeep Srinivasa
Тема Re: where does postgres keep the query result until it is returned?
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Msg-id AANLkTikiyXgHd8Wjub+=pgjEGfMuykcw11oNa8X3zAKU@mail.gmail.com
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Ответ на Re: where does postgres keep the query result until it is returned?  (Merlin Moncure <mmoncure@gmail.com>)
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On Mon, Sep 20, 2010 at 5:27 PM, Merlin Moncure <mmoncure@gmail.com> wrote:
On Fri, Sep 17, 2010 at 3:59 PM, Sam Mason <sam@samason.me.uk> wrote:
> On Fri, Sep 17, 2010 at 04:51:46PM +0200, Willy-Bas Loos wrote:
>> i have a function that produces a result in xml.
>> that is one row, one value even, but it grows pretty large.
>> how is that handled?
>
> Rows are sent back in the entireity, so the PG instance would need
> enough memory to work with that row.  When you're running a 32bit
> version of PG, values whose size is beyond ~100MB are a bit touch and go
> whether it will work.

Is'nt "work_mem" used for this on the server side (when sorts and hash-tables are required) and "temp_buffers" (when temporary tables are created) ?

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