Is there a way to limit I/O bandwidth/CPU usage of a certain backend? It seems that ionice/renice makes no sense because of bgwriter/WAL writer processes are not a part of a backend. I have a periodic query (every hour) that make huge I/O load and should run in background. When this query runs all other fast queries slow down dramatically. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance