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Disk usage for intermediate results in join - Mailing list pgsql-hackers

From Parul Lakkad
Subject Disk usage for intermediate results in join
Date
Msg-id CACmw6hSNjttk2uhP7KV-OWQ3Lv2KdeB8TdOva7J1EgMtLxzzug@mail.gmail.com
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Responses Re: Disk usage for intermediate results in join  (Heikki Linnakangas <hlinnakangas@vmware.com>)
Re: Disk usage for intermediate results in join  (Marti Raudsepp <marti@juffo.org>)
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Hi,

I am trying to figure out when disk is used to store intermediate results while performing joins in postgres.

According my findings using 'explain analyse ' only merge sort uses disk.
Can anyone please throw some more light on this?

Thanks,
Parul

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