This patch implements the first wiki/Todo Configuration Files item "Consider normalizing fractions in postgresql.conf, perhaps using '%'".
The "Fractions in GUC variables" discussion is here. http://www.postgresql.org/message-id/467132cf.9020...@enterprisedb.com This patch implements expressing GUC variables as percents in postgresql.conf. autovacuum_vacuum_scale_factor = 20% # percent of table size before vacuum autovacuum_analyze_scale_factor = 10% # percent of table size before analyze As you can see the postgresql.conf file and the documentation read more naturally. I added a regression test to guc.sql. The sql interface also accepts both numeric and percent forms although the percent form must be quoted because '%' is an operator. show cursor_tuple_fraction; --> 10% set cursor_tuple_fraction = .15; --> 15% set cursor_tuple_fraction = '33%'; --> 33% I tagged four configuration variables to display as percents. The attached patch applies cleanly against master and passes all regression tests including two new tests in guc.sql.
guc_percent-v1.patch
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