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Re: Extended Prefetching using Asynchronous IO - proposal and patch - Mailing list pgsql-hackers

From Claudio Freire
Subject Re: Extended Prefetching using Asynchronous IO - proposal and patch
Date
Msg-id CAGTBQpZnSgxr2_RufpaSeQGWjVgjmTuaxTdooqxSicUNntS0dw@mail.gmail.com
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In response to Re: Extended Prefetching using Asynchronous IO - proposal and patch  (Peter Geoghegan <[email protected]>)
Responses Re: Extended Prefetching using Asynchronous IO - proposal and patch
List pgsql-hackers
On Wed, May 28, 2014 at 6:51 PM, Peter Geoghegan <[email protected]> wrote:
> Have you thought about things like specialized prefetching for nested
> loop joins?

Currently, such a thing would need some non-trivial changes to the
execution nodes, I believe.

For nestloop, correct me if I'm wrong, but index scan nodes don't have
visibility of the next tuple to be searched for.



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