Re: JDBC and processing large numbers of rows

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От Guido Fiala
Тема Re: JDBC and processing large numbers of rows
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Msg-id 200405121431.08734.guido.fiala@dka-gmbh.de
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Ответ на Re: JDBC and processing large numbers of rows  (Kris Jurka <books@ejurka.com>)
Ответы Re: JDBC and processing large numbers of rows
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Am Mittwoch, 12. Mai 2004 12:00 schrieb Kris Jurka:
> The backend spools to a file when a materialized cursor uses more than
> sort_mem amount of memory.  This is not quite the same as swapping as it
> will consume disk bandwidth, but it won't hog memory from other
> applications.

Well thats good on one side, but from the side of the user its worse:

He will see a large drop in performance (factor 1000) ASAP the database starts
using disk for such things. Ok - once the database is to large to be hold in
memory it is disk-bandwith-limited anyway...



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