Re: bgwriter_lru_multiplier maximum value

Michael Paquier <[email protected]> Mon, 1 Apr 2019 22:18:09 +0900

Newsgroups	gmane.comp.db.postgresql.devel.documentation
Message-ID	<[email protected]>

On Mon, Apr 01, 2019 at 10:27:13AM +0000, PG Doc comments form wrote:
> The server has an undocumented maximum value of 10 for
> bgwriter_lru_multiplier, and will fail to start if it's set higher than
> this:
> 
> LOG:  20 is outside the valid range for parameter "bgwriter_lru_multiplier"
> (0 .. 10)
> FATAL:  configuration file "/.../pgdata/postgresql.conf" contains errors

I would suggest something like that:
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -2050,7 +2050,8 @@ include_dir 'conf.d'
          Larger values provide some cushion against spikes in demand,
          while smaller values intentionally leave writes to be done by
          server processes.
-         The default is 2.0.
+         The default is 2.0.  The value can range from <literal>2.0</literal>
+         to <literal>10.0</literal>
          This parameter can only be set in the <filename>postgresql.conf</filename>
          file or on the server command line.
         </para>

Any opinions from others?
--
Michael

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