| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Claudio Freire <klaussfreire(at)gmail(dot)com> |
| Cc: | Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, John Lumby <johnlumby(at)hotmail(dot)com>, pgsql hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Extended Prefetching using Asynchronous IO - proposal and patch |
| Date: | 2014-05-29 21:19:35 |
| Message-ID: | 17548.1401398375@sss.pgh.pa.us |
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| Lists: | pgsql-general pgsql-hackers |
Claudio Freire <klaussfreire(at)gmail(dot)com> writes:
> Didn't fix that, but the attached patch does fix regression tests when
> scanning over index types other than btree (was invoking elog when the
> index am didn't have ampeeknexttuple)
"ampeeknexttuple"? That's a bit scary. It would certainly be unsafe
for non-MVCC snapshots (read about vacuum vs indexscan interlocks in
nbtree/README).
regards, tom lane
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