| From: | Claudio Freire <klaussfreire(at)gmail(dot)com> |
|---|---|
| To: | Heikki Linnakangas <hlinnakangas(at)vmware(dot)com> |
| Cc: | John Lumby <johnlumby(at)hotmail(dot)com>, pgsql hackers <pgsql-hackers(at)postgresql(dot)org>, Greg Stark <stark(at)mit(dot)edu>, "andres(at)2ndquadrant(dot)com" <andres(at)2ndquadrant(dot)com> |
| Subject: | Re: Extended Prefetching using Asynchronous IO - proposal and patch |
| Date: | 2014-08-19 23:10:20 |
| Message-ID: | CAGTBQpbrHCJvkCmXmA8zHmfKNLLtqbgagLaYA+Z9E-F0oY2EtQ@mail.gmail.com |
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| Lists: | pgsql-general pgsql-hackers |
On Tue, Aug 19, 2014 at 7:27 PM, Heikki Linnakangas
<hlinnakangas(at)vmware(dot)com> wrote:
> Also, please split prefetching of regular index scans into a separate patch.
> It's orthogonal to doing async I/O; we could prefetch regular index scans
> with posix_fadvise too, and AIO should be useful for prefetching other
> stuff.
That patch already happened on the list, and it wasn't a win in many
cases. I'm not sure it should be proposed independently of this one.
Maybe a separate patch, but it should be considered dependent on this.
I don't have an archive link at hand atm, but I could produce one later.
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