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Re: Checkpointer on hot standby runs without looking checkpoint_segments

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>
Cc: simon(at)2ndquadrant(dot)com, pgsql-hackers(at)postgresql(dot)org, heikki(dot)linnakangas(at)enterprisedb(dot)com, masao(dot)fujii(at)gmail(dot)com
Subject: Re: Checkpointer on hot standby runs without looking checkpoint_segments
Date: 2012-07-02 17:03:15
Message-ID: CA+Tgmob=4QJAQPx2jPoB2508aYyB2FgM+1XDhN5JTryJBEsCSw@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On Mon, Jul 2, 2012 at 5:08 AM, Kyotaro HORIGUCHI
<horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp> wrote:
> I don't know why you hate to decrease checkpoint interval so much
> despite I proposed to do so only during WAL streaming (and
> additionaly allowing it to be optional), we have another and
> enough reason to want *to be able* to do so. Averaging disk usage
> is not a trivial issue for some users or - I suppose (or hope?) -
> not a few users. This is a subject not only of resource limit but
> also of operation management.

I agree.  I think there should be a way to do this.  I see the problem
with the proposed patch, but I think that means we need a better idea,
not that the problem is unimportant.

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

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