Re: SLRU statistics

From: Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Masahiko Sawada <masahiko(dot)sawada(at)2ndquadrant(dot)com>, "tsunakawa(dot)takay(at)fujitsu(dot)com" <tsunakawa(dot)takay(at)fujitsu(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: SLRU statistics
Date: 2020-05-13 14:46:30
Message-ID: fe3332c8-485a-540b-ca34-b024d452a7ae@oss.nttdata.com
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On 2020/05/13 23:26, Tom Lane wrote:
> Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com> writes:
>> On 2020/05/13 17:21, Tomas Vondra wrote:
>>> On Wed, May 13, 2020 at 04:10:30PM +0900, Fujii Masao wrote:
>>>> Also I found another minor issue; SLRUStats has not been initialized to 0
>>>> and which could update the counters unexpectedly. Attached patch fixes
>>>> this issue.
>
>> Pushed both. Thanks!
>
> Why is that necessary? A static variable is defined by C to start off
> as zeroes.

Because SLRUStats is not a static variable. No?

Regards,

--
Fujii Masao
Advanced Computing Technology Center
Research and Development Headquarters
NTT DATA CORPORATION

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