Date: Tue, 30 Jan 2018 10:26:29 -0500
From: Bruce Momjian <bruce@momjian.us>
To: Svensson Peter <peter.svensson@smhi.se>
Cc: Joe Conway <mail@joeconway.com>,
	"pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>
Subject: Re: SV: pgaudit and create postgis extension logs a lot inserts
Message-ID: <20180130152629.GE31052@momjian.us>
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On Fri, Jan 19, 2018 at 11:03:42AM +0000, Svensson Peter wrote:
> 
> A test to create postgis extension made 4 rsyslog processes run for several minutes with high cpu util,
> and when you have only 8 cpu:s this take lot of resources. 
> The create command also have to wait until all the log are written so there are great impact.
> Log file got 16 GB big only for this.

Uh, that seems odd.  Is rsyslog fsync'ing each write?  You should check
the docs on that.  Here is an example report:

	http://kb.monitorware.com/simple-question-what-does-the-dash-t10237.html

I don't see the dash behavior mentioned in my Debian Jessie rsyslogd
manual page though.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I.  As I am, so you will be. +
+                      Ancient Roman grave inscription +