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Document default and changeability of log_startup_progress_interval

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Review for 9ce346eabf.

Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Discussion: https://postgr.es/m/202110292123.bnf6axcp27vx@alvherre.pgsql
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Alvaro Herrera 2021-11-05 11:31:57 -03:00
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doc/src/sgml/config.sgml
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@ -6562,15 +6562,21 @@ local0.* /var/log/postgresql
Sets the amount of time after which the startup process will log
a message about a long-running operation that is still in progress,
as well as the interval between further progress messages for that
operation. This setting is applied separately to each operation.
operation. The default is 10 seconds. A setting of <literal>0</literal>
disables the feature. If this value is specified without units,
it is taken as milliseconds. This setting is applied separately to
each operation.
This parameter can only be set in the <filename>postgresql.conf</filename>
file or on the server command line.
</para>
<para>
For example, if syncing the data directory takes 25 seconds and
thereafter resetting unlogged relations takes 8 seconds, and if this
setting has the default value of 10 seconds, then a messages will be
logged for syncing the data directory after it has been in progress
for 10 seconds and again after it has been in progress for 20 seconds,
but nothing will be logged for resetting unlogged operations.
A setting of <literal>0</literal> disables the feature. If this value
is specified without units, it is taken as milliseconds.
</para>
</listitem>
</varlistentry>