| From: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de>, David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Subject: | Re: ATTACH/DETACH PARTITION CONCURRENTLY |
| Date: | 2018-08-09 18:57:35 |
| Message-ID: | 42e887c2-939f-41df-dd94-e886454b2529@2ndquadrant.com |
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| Thread: | |
| Lists: | pgsql-hackers |
On 07/08/2018 15:29, Andres Freund wrote:
> I don't think that solves the problem that an arriving relcache
> invalidation would trigger a rebuild of rd_partdesc, while it actually
> is referenced by running code.
The problem is more generally that a relcache invalidation changes all
pointers that might be in use. So it's currently not safe to trigger a
relcache invalidation (on tables) without some kind of exclusive lock.
One possible solution to this is outlined here:
<https://www.postgresql.org/message-id/CA+TgmobtmFT5g-0dA=vEFFtogjRAuDHcYPw+qEdou5dZPnF=pg@mail.gmail.com>
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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