Tony, thank you very much for all the detailed recommendations. Howerver, I'm happy/embarrassed to report that I found the cause of the postgres sessions. I have Webmin configured to do system monitoring. For whatever reason, Webmin is using the postgres account. When I disable the monitor, the session logs goes away (I swear I didn't see it in cron, but after looking again, it was there). Unfortunately, I still don't have an explanation why the System logger is restarting every hour? I will review your recommendations further and see what else I can learn. Thank you again for the detailed response.
