Re: Proposal : For Auto-Prewarm.

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>
Cc: Mithun Cy <mithun(dot)cy(at)enterprisedb(dot)com>, Beena Emerson <memissemerson(at)gmail(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Proposal : For Auto-Prewarm.
Date: 2017-02-27 15:07:08
Message-ID: CA+TgmoYRj_8X7_=tcDSGUJ8vGt1HA83=b5NFipJBu8aapmN4=g@mail.gmail.com
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On Mon, Feb 27, 2017 at 7:18 PM, Peter Eisentraut
<peter(dot)eisentraut(at)2ndquadrant(dot)com> wrote:
> On 2/26/17 11:46, Robert Haas wrote:
>> I don't see
>> a solution other than launching a separate worker for each database,
>> which seems like it could be extremely expensive if there are many
>> databases.
>
> You don't have to start all these workers at once. Starting one and not
> starting the next one until the first one is finished should be fine.
> It will have the same serial behavior that the patch is proposing anyway.

Yeah, true. The constant factor is higher, of course.

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

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