Re: pgbench bug candidate: negative "initial connection time"

From: Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>
To: Yugo NAGATA <nagata(at)sraoss(dot)co(dot)jp>, Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
Cc: Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, kuroda(dot)hayato(at)fujitsu(dot)com, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: pgbench bug candidate: negative "initial connection time"
Date: 2021-09-06 17:34:17
Message-ID: 602fccbd-a8cf-fc0a-da63-faaeb2cfbabe@oss.nttdata.com
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On 2021/07/29 13:23, Yugo NAGATA wrote:
> Hello,
>
> On Fri, 18 Jun 2021 15:58:48 +0200 (CEST)
> Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> wrote:
>
>> Attached Yugo-san patch with some updates discussed in the previous mails,
>> so as to move things along.
>
> I attached the patch rebased to a change due to 856de3b39cf.

+ pg_log_fatal("connection for initialization failed");
+ pg_log_fatal("setup connection failed");
+ pg_log_fatal("cannot create connection for client %d",

These fatal messages output when doConnect() fails should be a bit more consistent each other? For example,

could not create connection for initialization
could not create connection for setup
could not create connection for client %d

I'm not sure, but *if* "xxx failed" is more proper for pgbench, what about

connection for initialization failed
connection for setup failed
connection for client %d failed

> Exit status 1 indicates static problems such as invalid command-line options.
> Errors during the run such as database errors or problems in the script will
> result in exit status 2.

While reading the code and docs related to the patch, I found
these descriptions in pgbench docs. The first description needs to be
updated? Because even database error (e.g., failure of connection for setup)
can result in exit status 1 if it happens before the benchmark actually runs.

Regards,

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

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