From 2ef7a985fb9077aabeb480a23732c4d6ddb89ce5 Mon Sep 17 00:00:00 2001 From: Peter Eisentraut Date: Mon, 23 Nov 2015 09:13:44 -0500 Subject: [PATCH] doc: Add more documentation about wal_retrieve_retry_interval from Michael Paquier --- doc/src/sgml/config.sgml | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index 6e14851f69..392eb700b0 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -3054,6 +3054,17 @@ include_dir 'conf.d' postgresql.conf file or on the server command line. The default value is 5 seconds. Units are milliseconds if not specified. + + This parameter is useful in configurations where a node in recovery + needs to control the amount of time to wait for new WAL data to be + available. For example, in archive recovery, it is possible to + make the recovery more responsive in the detection of a new WAL + log file by reducing the value of this parameter. On a system with + low WAL activity, increasing it reduces the amount of requests necessary + to access WAL archives, something useful for example in cloud + environments where the amount of times an infrastructure is accessed + is taken into account. +