doc: update audit docs

Author: Muni10

docs/persistence/postgres/how-to/enable-auditing.md

@@ -8,17 +8,24 @@ tags: [postgres, audit, troubleshooting, how-to]
 
     The cli used for this configuration can only detect sql instances in GCP.
 
+
 This guide describes how to enable audit logging in your postgreSQL database.
 
 The following steps need to be taken to enable the logging.
 
 1. [Configure database flags](#configure-database-flags-for-your-sql-instance), and configure replication etc.
 2. [Configure database internals](#use-the-nais-cli-to-configure-database-internals) to be the primary.
 
+The pgaudit logs will require disk space, monitor disk usage and [enable automatic storage increase](https://doc.nais.io/workloads/application/reference/application-spec/#gcpsqlinstancesdiskautoresize) if necessary.
+
 For more information on audit logging, see the [official documentation](https://cloud.google.com/sql/docs/postgres/pg-audit).
 
 ## Configure database flags for your sql instance
 
+!!! info "Changing cloudsql.enable_pgaudit flag"
+
+    Changing this flag after first-time setup will restart the postgreSQL instance.
+
 The following database flags must be set before we can enable audit logging. 
 ```text
 cloudsql.enable_pgaudit
@@ -49,6 +56,8 @@ Possible values for `pgaudit.log` are as follows (and all combinations of these)
 - `function` - Log function calls and do-blocks operations.
 - `all` - Log all commands.
 
+Other flags that are available for pgaudit are documented [here](https://github.com/pgaudit/pgaudit/blob/main/README.md#settings).
+
 ## Use the nais cli to configure database internals
 
 The nais cli can be used to configure the database internals. This will fail if the necessary database flags have not been configured.