Disk Usage: https://wiki.postgresql.org/wiki/Disk_Usage
Index Maintenancehttps://wiki.postgresql.org/wiki/Index_Maintenance
ETHZ wiki PSQL howtos: https://wiki-bsse.ethz.ch/display/ITDOC/PostgreSQL+HOWTOs/
Size commands: https://wiki-bsse.ethz.ch/ -> Size Commands
Runtime config logging:http://www.postgresql.org/docs/9.3/static/runtime-config-logging.html