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bgw_replstatus95 - PostgreSQL background worker to report wether a node is a replication master or standby
- Description:
bgw_replstatus is a tiny background worker to cheaply report the
replication status of a node. It's intended to be polled by a load
balancer such as haproxy.
When installed, a background worker will be started that listens on a
defined TCP port (configured bgw_replstatus.port). Any connection to
this port will get a TCP response back (no request necessary, response
will be sent immediately on connect) saying either MASTER or STANDBY
depending on the current state of the node. The connection is then
automatically closed.
Using a background worker like this will make polling a lot more light
weight than making a full PostgreSQL connection, logging in, and
checking the status.
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