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standby follow: don't restart server (PostgreSQL 13 and later)

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As of PostgreSQL 13, changes to the fundamental replication
configuration can be applied with a simple SIGHUP, no restart
required.

In case the old behaviour is desired, i.e. a full restart to apply
the configuration changes, the new configuration parameter
"standby_follow_restart" can be set. This parameter has no effect
in PostgreSQL 12 and earlier.
This commit is contained in:
Ian Barwick
2020-09-29 16:37:09 +09:00
parent 48f95f9a39
commit 73d2088a85
7 changed files with 58 additions and 5 deletions
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10
doc/repmgr-standby-follow.xml
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@@ -47,7 +47,15 @@
</para>
<para>
This command will force a restart of PostgreSQL on the standby node.
In PostgreSQL 12 and earlier, this command will force a restart of PostgreSQL on the standby node.
</para>
<para>
In PostgreSQL 13 and later, by default this command will signal PostgreSQL to reload its
configuration, which will cause PostgreSQL to follow the new upstream without
a restart. If this behaviour is not desired for whatever reason, the configuration
file parameter <varname>standby_follow_restart</varname> can be set <literal>true</literal>
to always force a restart.
</para>
<para>