BUG #7534: walreceiver takes long time to detect n/w breakdown

The following bug has been logged on the website:

Bug reference:      7534
Logged by:          Amit Kapila
Email address:      amit.kapila@huawei.com
PostgreSQL version: 9.2.0
Operating system:   Suse 10
Description:        =


1. Both master and standby machine are connected normally, =

2. then you use the command: ifconfig ip down; make the network card of
master and standby down, =


Observation =

master can detect connect abnormal, but the standby can't detect connect
abnormal and show a connected channel long time. =