What Is Wal Sender
A Wal Sender Process Runs on a Master, Whereas the Wal Receiver and Startup Processes Runs on Its Slave. When You Start the Replication, a Wal Receiver Process...
A wal sender process runs on a master, whereas the wal receiver and startup processes runs on its slave. When you start the replication, a wal receiver process sends the LSN (Log Sequence Number) up until when the WAL data has been replayed on a slave, to the master.
What is WAL segment?
A WAL segment is a 16 MB file, by default, and it is internally divided into pages of 8192 bytes (8 KB).
What is Max_standby_archive_delay?
max_standby_archive_delay applies when WAL data is being read from WAL archive (and is therefore not current). The default is 30 seconds. Units are milliseconds if not specified. … max_standby_streaming_delay applies when WAL data is being received via streaming replication. The default is 30 seconds.
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