Re: performance issue in remove_from_unowned_list()

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>
Cc: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Postgres hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: performance issue in remove_from_unowned_list()
Date: 2019-03-13 13:48:26
Message-ID: CA+TgmobELht8YLsh3FOYaOAsM6DrSu5_vOoJru7ni4OmGCU6ng@mail.gmail.com
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On Wed, Mar 13, 2019 at 9:47 AM Tomas Vondra
<tomas(dot)vondra(at)2ndquadrant(dot)com> wrote:
> AFAICS we already maintain a hash table of the smgr relations, and we
> look them up in this table. We don't need to look them up in the list of
> unowned relations - the whole problem is that with the current
> single-linked list, we need to iterate the list anyway to update pointer
> in the preceding entry.

OK, I'm dumb. Sorry for the noise.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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