From 3bc4c694271bfe28b909f43d45fe5168c18ad5b8 Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Fri, 6 Feb 2015 11:18:14 +0200 Subject: Report WAL flush, not insert, position in replication IDENTIFY_SYSTEM When beginning streaming replication, the client usually issues the IDENTIFY_SYSTEM command, which used to return the current WAL insert position. That's not suitable for the intended purpose of that field, however. pg_receivexlog uses it to start replication from the reported point, but if it hasn't been flushed to disk yet, it will fail. Change IDENTIFY_SYSTEM to report the flush position instead. Backpatch to 9.1 and above. 9.0 doesn't report any WAL position. --- doc/src/sgml/protocol.sgml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'doc/src') diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml index 31bbc0d4c2e..cec56978b74 100644 --- a/doc/src/sgml/protocol.sgml +++ b/doc/src/sgml/protocol.sgml @@ -1369,7 +1369,7 @@ The commands accepted in walsender mode are: - Current xlog write location. Useful to get a known location in the + Current xlog flush location. Useful to get a known location in the transaction log where streaming can start. -- cgit v1.2.3