From: Tom Lane <tgl@sss.pgh.pa.us>
To: Craig Ringer <craig@2ndquadrant.com>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Kyotaro HORIGUCHI <horiguchi.kyotaro@lab.ntt.co.jp>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: Protect syscache from bloating with negative cache entries
Date: Tue, 20 Dec 2016 10:09:18 -0500
Message-ID: <30868.1482246558@sss.pgh.pa.us> (raw)
In-Reply-To: <CAMsr+YHziSok-AM=krEQ+HaRQzst4+M1+2WGYqZw_i6w9vVBvA@mail.gmail.com>
References: <20161219.201505.11562604.horiguchi.kyotaro@lab.ntt.co.jp>
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Craig Ringer <craig@2ndquadrant.com> writes:
> On 20 December 2016 at 21:59, Robert Haas <robertmhaas@gmail.com> wrote:
>> We could implement this by having
>> some process, like the background writer,
>> SendProcSignal(PROCSIG_HOUSEKEEPING) to every process in the system
>> every 10 minutes or so.
> ... on a rolling basis.
I don't understand why we'd make that a system-wide behavior at all,
rather than expecting each process to manage its own cache.
regards, tom lane
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Cc: tgl@sss.pgh.pa.us, craig@2ndquadrant.com, robertmhaas@gmail.com, horiguchi.kyotaro@lab.ntt.co.jp
Subject: Re: Protect syscache from bloating with negative cache entries
In-Reply-To: <30868.1482246558@sss.pgh.pa.us>
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