Re: How to log 'user time' in postgres logs

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
Cc: francis picabia <fpicabia(at)gmail(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: How to log 'user time' in postgres logs
Date: 2019-08-28 14:28:51
Message-ID: 9124.1567002531@sss.pgh.pa.us
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Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> writes:
> On 8/28/19 5:36 AM, francis picabia wrote:
>> I had no clue the database was the issue because I
>> had the minimal
>> log_duration = on
>> log_line_prefix = '<%t>'
>> With those settings all queries seen were roughly 1ms
>>
>> I need this log to show the true time it takes to get a result back.

> I'm having a hard time believing autovacuum was involved in this, given
> you say the queries took only 1ms on average.

Also: the time logged by log_duration IS the time it took, so far as the
server can tell.

Perhaps there's monstrous network delays involved, but what I'm suspicious
of is inefficient client-side processing.

regards, tom lane

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