Hi all, I noticed a note on the 'Priorities' wiki page[1], which talked about the need for having "a C-language function 'nice_backend(prio)' that renices the calling backend to "prio".', and suggests posting a link to this list. Well, here you go: http://pgxn.org/dist/prioritize/ The API is a tiny bit different than what was suggested on the wiki; the wiki suggested "nice_backend()" and "nice_backend_super()", whereas I just consolidated those into set_backend_priority(), with permissions checks similar to pg_cancel_backend(). There is also get_backend_priority(), which should play nicely with the former function, and perhaps enable scripted queries to automatically bump priorities based on pg_stat_activity. See the doc[3] for more details. The wiki says nice_backend_super() might be able to "renice any backend pid and set any priority, but is usable only by the [database] superuser", hinting that it would be feasible to lower a backend's priority value (i.e. increase the scheduling priority). Unfortunately this is not possible on at least OS X and Linux, where one must be root to lower priority values. I haven't checked whether this module works on Windows, would appreciate if someone could give it a shot there. I can update the 'Priorities' wiki page in a bit. Josh [1] http://wiki.postgresql.org/wiki/Priorities [3] https://github.com/schmiddy/pg_prioritize/blob/master/doc/prioritize.md -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
