From 76dbb4615389e1f44e48074b87be77262143021e Mon Sep 17 00:00:00 2001 From: Robert Haas Date: Thu, 17 Mar 2011 15:10:55 -0400 Subject: [PATCH] Protocol documentation for Hot Standby feedback messages. --- doc/src/sgml/protocol.sgml | 63 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 60 insertions(+), 3 deletions(-) diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml index c923d3b154c..6be5a149aec 100644 --- a/doc/src/sgml/protocol.sgml +++ b/doc/src/sgml/protocol.sgml @@ -1471,9 +1471,9 @@ The commands accepted in walsender mode are: - The receiving process can send a status update back to the sender at - any time, using the following message format (also in the payload of - a CopyData message): + The receiving process can send replies back to the sender at any time, + using one of the following message formats (also in the payload of a + CopyData message): @@ -1545,6 +1545,63 @@ The commands accepted in walsender mode are: + + + + + + Hot Standby feedback message (F) + + + + + + + Byte1('h') + + + + Identifies the message as a Hot Standby feedback message. + + + + + + Byte8 + + + + The server's system clock at the time of transmission, + given in TimestampTz format. + + + + + + Byte4 + + + + The standby's current xmin. + + + + + + Byte4 + + + + The standby's current epoch. + + + + + + + + +