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Update README with replication slot information

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Ian Barwick
2015-03-11 17:40:27 +09:00
parent fb28ee6f1c
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README.md
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@@ -293,7 +293,22 @@ connect to, e.g.:
Replication slots
-----------------
...
Replication slots were introduced with PostgreSQL 9.4 and enable standbys to
notify the master of their WAL consumption, ensuring that the master will
not remove any WAL files until they have been received by all standbys.
This mitigates the requirement to manage WAL file retention using
`wal_keep_segments` etc., with the caveat that if a standby fails, no WAL
files will be removed until the standby's replication slot is deleted.
To enable replication slots, set the boolean parameter `use_replication_slots`
in `repmgr.conf`:
use_replication_slots=1
`repmgr` will automatically generate an appropriate slot name, which is
stored in the `repl_nodes` table.
http://www.postgresql.org/docs/current/interactive/warm-standby.html#STREAMING-REPLICATION-SLOTS
Reference
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