Re: About tapes - Mailing list pgsql-hackers

From mac_man2005@hotmail.it
Subject Re: About tapes
Date
Msg-id BLU0-SMTP93C48E617F26B5CC5AFADE6C00@phx.gbl
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In response to Re: About tapes  (Robert Haas <robertmhaas@gmail.com>)
Responses Re: About tapes  (Robert Haas <robertmhaas@gmail.com>)
List pgsql-hackers
Il 18/06/2010 21:00, Robert Haas ha scritto:
> On Fri, Jun 18
> Did you read the rest of the comment?  It explains how the code avoids this...
>
>    

Robert, thanks for your reply.
I read the rest of the document, but please take in account that my 
question wasn't about "avoiding".
My question is "in which cases"?

I repeat my question. Tuplesort.c and logtape.c DO implement tapes on 
disk and currently they do not request 2x or 4x of the input space: so, 
again, in which case implementing tapes on disks requires between 2x and 
4x of input space?

Thanks for your attention.
Manolo.


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