Re: Delay locking partitions during INSERT and UPDATE

From: David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)anarazel(dot)de>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, John Naylor <john(dot)naylor(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Delay locking partitions during INSERT and UPDATE
Date: 2019-02-20 21:56:17
Message-ID: CAKJS1f8JaEDTtUyQ53u7AzQFgu9tQLx1DJVTObOsWF9c7hUyfQ@mail.gmail.com
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On Thu, 21 Feb 2019 at 10:32, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> I spent some time thinking about that exact issue this morning and
> studying the code to try to figure that out. I wasn't able to find
> any other places that seemed to need updating, but it could be that I
> missed something that David also missed.

It looks like the comment that claimed the table was already locked
crept back in during a (seemingly) sloppy rebase after the
relation_open() -> table_open() change.

I've made a pass over this again and updated the header comments in
functions that now obtain a lock to mention that fact.

Also slightly updated commit msg in the patch.

--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

Attachment Content-Type Size
v3-0001-On-demand-locking-of-partitions-during-INSERT-and.patch application/octet-stream 5.5 KB

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