Wal

http://www.mysqlperformanceblog.com/2011/02/03/how-innodb-handles-redo-logging/

http://www.mysqlperformanceblog.com/2011/02/03/how-innodb-handles-redo-logging/ How MySQL InnoDB implements transaction log, aka REDO (Oracle), aka WAL (PostgreSQL)

http://www.westnet.com/~gsmith/content/postgresql/chkp-bgw-83.htm improvements to PostgreSQL that could be made by tuning wal/background writer processes

http://www.westnet.com/~gsmith/content/postgresql/TuningPGWAL.htm Notes about PostgreSQL WAL synchronizations methods

http://developer.postgresql.org/pgdocs/postgres/wal-configuration.html Notes about Write-Ahead Log, Check points and other IO configuration related to postgresql transaction log settings