Add options to pg_autovacuum to support setting the cost-based-vacuum

parameters differently from their default values.  Matthew T. O'Connor

contrib/pg_autovacuum/README.pg_autovacuum

@@ -133,6 +133,17 @@ pg_autovacuum has the following optional arguments:
 -p port: port used for connection.
 -h help: list of command line options.
 
+The following 5 autovacuum command line options correspond to the various
+cost-based vacuum settings.  If not given, then the cluster default values
+will be used.
+
+-c	vacuum_cost_delay
+-C	vacuum_cost_page_hit
+-m	vacuum_cost_page_miss
+-n	vacuum_cost_page_dirty
+-N	vacuum_cost_limit
+
+
 Numerous arguments have default values defined in pg_autovacuum.h.  At
 the time of writing they are:
 

contrib/pg_autovacuum/pg_autovacuum.h

@@ -2,7 +2,7 @@
  * Header file for pg_autovacuum.c
  * (c) 2003 Matthew T. O'Connor
  *
- * $PostgreSQL: pgsql/contrib/pg_autovacuum/pg_autovacuum.h,v 1.12 2004/10/16 21:50:02 tgl Exp $
+ * $PostgreSQL: pgsql/contrib/pg_autovacuum/pg_autovacuum.h,v 1.13 2004/11/17 16:54:15 tgl Exp $
  */
 
 #ifndef _PG_AUTOVACUUM_H
@@ -46,6 +46,16 @@ typedef struct cmdargs
 				analyze_base_threshold,
 				sleep_base_value,
 				debug,
+				
+				/*
+				 * Cost-Based Vacuum Delay Settings for pg_autovacuum
+				 */
+				av_vacuum_cost_delay,
+				av_vacuum_cost_page_hit,
+				av_vacuum_cost_page_miss,
+				av_vacuum_cost_page_dirty,
+				av_vacuum_cost_limit,
+				
 #ifndef WIN32
 				daemonize;
 #else