Re: [HACKERS] [PATCH] Vacuum: Update FSM more frequently

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Claudio Freire <klaussfreire(at)gmail(dot)com>
Cc: Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, PostgreSQL-Dev <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [HACKERS] [PATCH] Vacuum: Update FSM more frequently
Date: 2018-02-07 17:02:38
Message-ID: CA+TgmoaSpGdutqoJ495V849uebhLYGhD98tPkj39fCVH_hxqXw@mail.gmail.com
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On Tue, Feb 6, 2018 at 7:51 AM, Claudio Freire <klaussfreire(at)gmail(dot)com> wrote:
> No free space becomes visible during long-running vacuums. That means
> bloat keeps accumulating even though vacuum is freeing space, because
> the FSM doesn't expose that free space.
>
> The extra work incurred in those FSM vacuums isn't useless, it's
> preventing bloat in long-running vacuums.

+1.

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

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