From: Cédric Villemain <cedric@2ndquadrant.fr>
Date: Tue, 8 Mar 2011 22:21:45 +0000 (+0100)
Subject: Add total memory output to pgsysconf*()
X-Git-Tag: 1.0~27
X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=b96dbe21dc16fc67185b31f87e4171bb55ac8449;p=pgfincore.git

Add total memory output to pgsysconf*()
---

diff --git a/ChangeLog b/ChangeLog
index 8057234..d66a309 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,7 +2,8 @@
   * 0.5.0 - Output varbit containing vector information with pgmincore*()
 		  - Add Debian packaging (Dimitri Fontaine)
 		  - Update to work with PostgreSQL >= 9.1 (Jeff Janes)
-		  - Add function pgsysconf_pretty()
+          - Add total number of pages of memory with pgsysconf()
+          - Add function pgsysconf_pretty()
 
 04/30/2010 Cédric Villemain <cedric@villemain.org>
 
diff --git a/pgfincore.c b/pgfincore.c
index 53c670a..21603f9 100644
--- a/pgfincore.c
+++ b/pgfincore.c
@@ -41,7 +41,7 @@ PG_MODULE_MAGIC;
 #endif
 /* } */
 
-#define PGSYSCONF_COLS  2
+#define PGSYSCONF_COLS  3
 #define PGFINCORE_COLS  6
 
 /*
@@ -53,7 +53,7 @@ PG_MODULE_MAGIC;
 typedef struct
 {
 	int action;				/* the action  mincore, fadvise...*/
-	Relation rel;				/* the relation */
+	Relation rel;			/* the relation */
 	unsigned int segcount;	/* the segment current number */
 	char *relationpath;		/* the relation path */
 } pgfincore_fctx;
@@ -103,16 +103,18 @@ pgsysconf(PG_FUNCTION_ARGS)
 
 	tupdesc = CreateTemplateTupleDesc(PGSYSCONF_COLS, false);
 	TupleDescInitEntry(tupdesc, (AttrNumber) 1, "block_size",  INT8OID, -1, 0);
-	TupleDescInitEntry(tupdesc, (AttrNumber) 2, "block_free",  INT8OID, -1, 0);
+    TupleDescInitEntry(tupdesc, (AttrNumber) 2, "block_free",  INT8OID, -1, 0);
+    TupleDescInitEntry(tupdesc, (AttrNumber) 3, "total_blocks",  INT8OID, -1, 0);
 	tupdesc = BlessTupleDesc(tupdesc);
 
 	values[0] = Int64GetDatum(sysconf(_SC_PAGESIZE));  /* Page size */
-	values[1] = Int64GetDatum(sysconf(_SC_AVPHYS_PAGES));  /* free page in memory */
+    values[1] = Int64GetDatum(sysconf(_SC_AVPHYS_PAGES));  /* free page in memory */
+    values[2] = Int64GetDatum(sysconf(_SC_PHYS_PAGES));  /* total memory */
 	memset(nulls, 0, sizeof(nulls));
 
 	tuple = heap_form_tuple(tupdesc, values, nulls);
-	elog(DEBUG1, "pgsysconf: page_size %lld bytes, free page in memory %lld",
-	     (int64) values[0], (int64) values[1]);
+	elog(DEBUG1, "pgsysconf: page_size %lld bytes, free page in memory %lld, total memory pages %lld",
+	     (int64) values[0], (int64) values[1], (int64) values[2]);
 	PG_RETURN_DATUM( HeapTupleGetDatum(tuple) );
 }
 
diff --git a/pgfincore.sql.in b/pgfincore.sql.in
index e87dba5..6b4c9fa 100644
--- a/pgfincore.sql.in
+++ b/pgfincore.sql.in
@@ -1,19 +1,22 @@
 SET search_path = public;
 
 CREATE OR REPLACE FUNCTION
-pgsysconf(OUT block_size bigint,
-		  OUT block_free bigint)
+pgsysconf(OUT block_size   bigint,
+          OUT block_free   bigint,
+          OUT total_blocks bigint)
 RETURNS record
 AS 'MODULE_PATHNAME'
 LANGUAGE C;
 
 CREATE OR REPLACE FUNCTION
-pgsysconf_pretty(OUT block_size  text,
-                 OUT free_memory text)
+pgsysconf_pretty(OUT block_size   text,
+                 OUT free_memory  text,
+                 OUT total_memory text)
 RETURNS record
 AS '
 select pg_size_pretty(block_size) as block_size,
-       pg_size_pretty(block_free * block_size) as free_memory
+       pg_size_pretty(block_free * block_size) as free_memory,
+       pg_size_pretty(total_blocks * block_size) as total_memory
 from pgsysconf()'
 LANGUAGE SQL;