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authorRobert Haas <rhaas@postgresql.org>2010-06-17 01:32:09 +0000
committerRobert Haas <rhaas@postgresql.org>2010-06-17 01:32:09 +0000
commit5c5184c04397b65e551ddf0250484eb381f50f9f (patch)
tree742e004c4523d515da28c5804d9dbfe1fb0ad667 /doc/src
parent147c665d01002193a161a34f0e646d7c85d00c15 (diff)
downloadpostgresql-5c5184c04397b65e551ddf0250484eb381f50f9f.tar.gz
postgresql-5c5184c04397b65e551ddf0250484eb381f50f9f.zip
Document that receive location can rewind if replication restarts.
Fujii Masao, with some further wordsmithing by me.
Diffstat (limited to 'doc/src')
-rw-r--r--doc/src/sgml/func.sgml13
1 files changed, 8 insertions, 5 deletions
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index f4831359215..3037aaf1a6f 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.518 2010/06/10 07:00:25 heikki Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.519 2010/06/17 01:32:09 rhaas Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@@ -13282,10 +13282,13 @@ postgres=# SELECT * FROM pg_xlogfile_name_offset(pg_stop_backup());
<entry><type>text</type></entry>
<entry>Get last transaction log location received and synced to disk by
streaming replication. While streaming replication is in progress
- this will increase monotonically. If recovevery has completed
- this will remain static at the value of the last WAL record
- received and synced to disk during recovery. If streaming replication
- is disabled, or it has not yet started, the function returns NULL.
+ this will increase monotonically. But when streaming replication is
+ restarted this will back off to the replication starting position,
+ typically the beginning of the WAL file containing the current
+ replay location. If recovery has completed this will remain static at
+ the value of the last WAL record received and synced to disk during
+ recovery. If streaming replication is disabled, or if it has not yet
+ started, the function returns NULL.
</entry>
</row>
<row>