pg_receivewal: add page

pages/common/pg_receivewal.md

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+# pg_receivewal
+
+> Stream the write-ahead log from a running PostgreSQL cluster.
+> More information: <https://www.postgresql.org/docs/current/app-pgreceivewal.html>.
+
+- Stream WAL to a local directory (minimum required):
+
+`pg_receivewal {{[-D|--directory]}} {{directory}}`
+
+- Same as above, specify host, port, username including verbose output:
+
+`pg_receivewal {{[-v|--verbose]}} {{[-h|--host]}} {{host}} {{[-p|--port]}} {{port}} {{[-U|--username]}} {{username}} {{[-D|--directory]}} {{directory}}`
+
+- Use replication slot (create-if-needed):
+
+`pg_receivewal {{[-S|--slot]}} {{slot_name}} --create-slot {{[-h|--host]}} {{host}} {{[-p|--port]}} {{port}} {{[-U|--username]}} {{username}} {{[-D|--directory]}} {{directory}}`
+
+- Stop at a given WAL position (LSN):
+
+`pg_receivewal {{[-E|--endpos]}} {{lsn}} {{[-D|--directory]}} {{directory}} {{[-h|--host]}} {{host}} {{[-p|--port]}} {{port}} {{[-U|--username]}} {{username}}`
+
+- Control looping on failure:
+
+`pg_receivewal {{[-n|--no-loop]}} {{[-D|--directory]}} {{directory}} {{[-h|--host]}} {{host}} {{[-p|--port]}} {{port}} {{[-U|--username]}} {{username}}`
+
+- Flush data synchronously (force WAL writes immediately):
+
+`pg_receivewal --synchronous {{[-D|--directory]}} {{directory}} {{[-h|--host]}} {{host}} {{[-p|--port]}} {{port}} {{[-U|--username]}} {{username}}`
+
+- Compress WAL output (gzip, level 0–9):
+
+`pg_receivewal {{[-Z|--compress]}} {{level|method}} {{[-D|--directory]}} {{directory}} {{[-h|--host]}} {{host}} {{[-p|--port]}} {{port}} {{[-U|--username]}} {{username}}`
+
+- Set status reporting interval:
+
+`pg_receivewal {{[-s|--status-interval]}} {{seconds}} {{[-D|--directory]}} {{directory}} {{[-h|--host]}} {{host}} {{[-p|--port]}} {{port}} {{[-U|--username]}} {{username}}`