@mischievoustomato You can find the exact time in the log. If each message takes 30 seconds to deliver, 265 messages would take more than two hours (this is the size of your outgoing queue in the screenshot).

@mischievoustomato CORS issues are usually debugged from a browser. The server adds a header like access-control-allow-origin to its response and that should be visible in dev tools

@mischievoustomato @tadanoI don't use pgtune. My config has max_connections = 100 which is probably the default, and it works fine.If performance is poor this is likely mitra's fault, not postrges. For example, it could be caused by slow database queries, you can see them in your postgresql log if you add log_min_duration_statement = 500 to postgresql.conf (that will log every query that runs for more than 500 milliseconds)