From: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
---|---|
To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
Cc: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Explicit relation name in VACUUM VERBOSE log |
Date: | 2017-08-15 07:38:25 |
Message-ID: | CAD21AoCdB0wDsyPOeYdu-i1k3Ugrurrnwo12yTUQvF49MH=apg@mail.gmail.com |
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On Tue, Aug 15, 2017 at 11:14 AM, Alvaro Herrera
<alvherre(at)2ndquadrant(dot)com> wrote:
> Michael Paquier wrote:
>> On Tue, Aug 15, 2017 at 10:27 AM, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
>> > Currently vacuum verbose outputs vacuum logs as follows. The first log
>> > message INFO: vacuuming "public.hoge" writes the relation name with
>> > schema name but subsequent vacuum logs output only relation name
>> > without schema name. I've encountered a situation where there are some
>> > same name tables in different schemas and the concurrent vacuum logs
>> > made me hard to distinguish tables. Is there any reasons why we don't
>> > write an explicit name in vacuum verbose logs? If not, can we add
>> > schema names to be more clearly?
>>
>> That's definitely a good idea. lazy_vacuum_rel() uses in one place
>> dbname.schname.relname for autovacuum. This is an inconsistent bit,
>> but that's not really worth changing and there is always
>> log_line_prefix = '%d'.
>
> Worth keeping in mind that INFO messages do not normally go to the
> server log, but rather only to the client. If it were a problem at the
> server side, you could also suggest adding %p to the log line prefix to
> disambiguate. Maybe the scenario where this is a real problem is
> vacuumdb -j ...
Yeah, the situation I encountered is that. Invoke vaucuumdb -j and
save its logs to check later.
Regards,
--
Masahiko Sawada
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center
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