| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
| Cc: | Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, Peter Geoghegan <pg(at)bowt(dot)ie>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, Darafei Komяpa Praliaskouski <me(at)komzpa(dot)net>, Pavel Borisov <pashkin(dot)elfe(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Yet another fast GiST build |
| Date: | 2021-01-17 20:50:31 |
| Message-ID: | 234863.1610916631@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Heikki Linnakangas <hlinnaka(at)iki(dot)fi> writes:
> On 12/01/2021 18:19, Andrey Borodin wrote:
>> Thanks! Looks good to me.
> Pushed, thanks!
I noticed that gist_page_items() thinks it can hold inter_call_data->rel
open across a series of calls. That's completely unsafe: the executor
might not run the call series to completion (see LIMIT), resulting in
relcache leak complaints. I suspect that it might have cache-flush
hazards even without that. I think this code needs to be rewritten to do
all the interesting work in the first call. Or maybe better, return the
results as a tuplestore so you don't have to do multiple calls at all.
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tomas Vondra | 2021-01-17 21:32:49 | Re: COPY FREEZE and setting PD_ALL_VISIBLE/visibility map bits |
| Previous Message | Tom Lane | 2021-01-17 20:32:51 | Re: evtfoid and evtowner missing in findoidjoins/README |