Re: SLRU statistics - Mailing list pgsql-hackers

From Tomas Vondra
Subject Re: SLRU statistics
Date
Msg-id 20200513145739.wlnbse5rw3vvscyr@development
Whole thread Raw
In response to Re: SLRU statistics  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: SLRU statistics
List pgsql-hackers
On Wed, May 13, 2020 at 10:26:39AM -0400, Tom Lane wrote:
>Fujii Masao <masao.fujii@oss.nttdata.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.
>

But is it a static variable? It's not declared as 'static' but maybe we
can assume it inits to zeroes anyway? I see we do that for
BgWriterStats.



regards

-- 
Tomas Vondra                  http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services



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