Add Enable Logging Of Database Activity as a Postgres til

postgres/enable-logging-of-database-activity.md

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+# Enable Logging Of Database Activity
+
+For logging to be enabled for a PostgreSQL server, it needs to be properly
+configured. This means ensuring the `logging_collector` option is on. By
+default I believe it is `off`.
+
+This is configured in the `postgresql.conf` file and requires a server restart.
+
+First, to find where the conf file is. I can answer that question in a `psql`
+session.
+
+```sql
+> show config_file;
+                             config_file
+---------------------------------------------------------------------
+ /Users/jbranchaud/.asdf/installs/postgres/12.3/data/postgresql.conf
+(1 row)
+```
+
+Now, I can open up that file and search for the line that has
+`logging_collector`. I uncomment that line and change `off` to `on`.
+
+```
+# This is used when logging to stderr:
+logging_collector = on 		# Enable capturing of stderr and csvlog
+					# into log files. Required to be on for
+					# csvlogs.
+					# (change requires restart)
+```
+
+This requires a restart of the Postgres server.
+
+```bash
+$ ~/.asdf/installs/postgres/12.3/bin/pg_ctl -D ~/.asdf/installs/postgres/12.3/data restart
+waiting for server to shut down.... done
+server stopped
+waiting for server to start...
+ done
+server started
+```
+
+I can now adjust any further logging-related configurations on a server or
+session basis. And then view those logs.