diff -Naur pgsql.orig/src/backend/catalog/system_views.sql pgsql/src/backend/catalog/system_views.sql
--- pgsql.orig/src/backend/catalog/system_views.sql	Thu Mar  3 11:29:55 2005
+++ pgsql/src/backend/catalog/system_views.sql	Thu Mar  3 11:41:24 2005
@@ -277,3 +277,8 @@
     DO INSTEAD NOTHING;
 
 GRANT SELECT, UPDATE ON pg_settings TO PUBLIC;
+
+CREATE VIEW pg_dump_cache AS
+	SELECT D.* FROM pg_dump_cache() AS D
+	(bufferid integer, relfilenode oid, reltablespace oid, reldatabase oid);
+
diff -Naur pgsql.orig/src/backend/utils/adt/Makefile pgsql/src/backend/utils/adt/Makefile
--- pgsql.orig/src/backend/utils/adt/Makefile	Thu Mar  3 11:29:53 2005
+++ pgsql/src/backend/utils/adt/Makefile	Thu Mar  3 11:32:10 2005
@@ -24,7 +24,7 @@
 	tid.o timestamp.o varbit.o varchar.o varlena.o version.o xid.o \
 	network.o mac.o inet_net_ntop.o inet_net_pton.o \
 	ri_triggers.o pg_lzcompress.o pg_locale.o formatting.o \
-	ascii.o quote.o pgstatfuncs.o encode.o
+	ascii.o quote.o pgstatfuncs.o encode.o dumpcache.o
 
 like.o: like.c like_match.c
 
diff -Naur pgsql.orig/src/backend/utils/adt/dumpcache.c pgsql/src/backend/utils/adt/dumpcache.c
--- pgsql.orig/src/backend/utils/adt/dumpcache.c	Thu Jan  1 12:00:00 1970
+++ pgsql/src/backend/utils/adt/dumpcache.c	Thu Mar  3 11:51:53 2005
@@ -0,0 +1,119 @@
+/*-------------------------------------------------------------------------
+ *
+ * dumpcache.c
+ *    display some contents for the buffer cache
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+#include "funcapi.h"
+#include "catalog/pg_type.h"
+#include "storage/buf_internals.h"
+#include "storage/bufmgr.h"
+#include "utils/relcache.h"
+
+
+extern Datum dump_cache(PG_FUNCTION_ARGS);
+
+
+/*
+ * Function context for data persisting over repeated calls.
+ */
+typedef struct {
+	int				buffer;
+	AttInMetadata	*attinmeta;
+	BufferDesc		*bufhdr;
+	RelFileNode		rnode;
+	char			*values[3];
+} dumpcache_fctx;
+
+
+/*
+ * Return a tuple that has bufferid, relfilenoide, reltablespace and 
+ * reldatabase OIDs.
+ */
+Datum
+dump_cache(PG_FUNCTION_ARGS)
+{
+	FuncCallContext		*funcctx;
+	Datum				result;
+	MemoryContext		oldcontext;
+	dumpcache_fctx		*fctx;		/* User function context. */
+	TupleDesc			tupledesc;
+	HeapTuple			tuple;
+
+	if (SRF_IS_FIRSTCALL())
+	{
+		funcctx = SRF_FIRSTCALL_INIT();
+
+		/* Switch context when allocating stuff to be used in later calls */
+		oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+		
+		/* construct a tuple to return */
+		tupledesc = CreateTemplateTupleDesc(4, false);
+		TupleDescInitEntry(tupledesc, (AttrNumber) 1, "bufferid",
+									INT4OID, -1, 0);
+		TupleDescInitEntry(tupledesc, (AttrNumber) 2, "relfilenode",
+									OIDOID, -1, 0);
+		TupleDescInitEntry(tupledesc, (AttrNumber) 3, "reltablespace",
+									OIDOID, -1, 0);
+		TupleDescInitEntry(tupledesc, (AttrNumber) 4, "reldatabase",
+									OIDOID, -1, 0);
+
+		/* Generate attribute metadata needed later to produce tuples */
+		funcctx->attinmeta = TupleDescGetAttInMetadata(tupledesc);
+
+		/* 
+		 * Create a function context for cross-call persistence 
+		 * and initialize the buffer counters.
+		 */
+		fctx = (dumpcache_fctx *) palloc(sizeof(dumpcache_fctx));
+
+		fctx->buffer = 0;
+		fctx->bufhdr = BufferDescriptors;
+
+		funcctx->user_fctx = fctx;
+		funcctx->max_calls = NBuffers;
+
+		/* allocate the strings for tuple formation */
+		fctx->values[0] = (char *) palloc(NAMEDATALEN + 1);
+		fctx->values[1] = (char *) palloc(NAMEDATALEN + 1);
+		fctx->values[2] = (char *) palloc(NAMEDATALEN + 1);
+		fctx->values[3] = (char *) palloc(NAMEDATALEN + 1);
+
+		
+		/* Return to original context when allocating transient memory */
+		MemoryContextSwitchTo(oldcontext);
+	}
+	/* <user defined code> */
+	funcctx = SRF_PERCALL_SETUP();
+	
+	/* Get the saved state, and set up the result */
+	fctx = funcctx->user_fctx;
+
+
+	if (funcctx->call_cntr < funcctx->max_calls)
+	{
+		/* Get the relation node */
+		fctx->rnode = (fctx->bufhdr)->tag.rnode;
+
+		/* setup cstrings and create a tuple from them */
+		sprintf(fctx->values[0], "%u", fctx->buffer);
+		sprintf(fctx->values[1], "%u", fctx->rnode.relNode);
+		sprintf(fctx->values[2], "%u", fctx->rnode.spcNode);
+		sprintf(fctx->values[3], "%u", fctx->rnode.dbNode);
+
+		tuple = BuildTupleFromCStrings(funcctx->attinmeta, fctx->values);
+		result = HeapTupleGetDatum(tuple);
+
+
+		/* increment the buffer count and the buffer it points to */
+		fctx->buffer++;
+		fctx->bufhdr++;
+
+		SRF_RETURN_NEXT(funcctx, result);
+	}
+	else
+		SRF_RETURN_DONE(funcctx);
+}
+
diff -Naur pgsql.orig/src/include/catalog/pg_proc.h pgsql/src/include/catalog/pg_proc.h
--- pgsql.orig/src/include/catalog/pg_proc.h	Thu Mar  3 11:30:02 2005
+++ pgsql/src/include/catalog/pg_proc.h	Thu Mar  3 11:39:27 2005
@@ -3615,6 +3615,8 @@
 DATA(insert OID = 2558 ( int4				   PGNSP PGUID 12 f f t f i 1  23 "16" _null_	bool_int4 - _null_ ));
 DESCR("convert boolean to int4");
 
+/* dump cache */
+DATA(insert OID = 2510 (  pg_dump_cache PGNSP PGUID 12 f f t t v 0 2249 "" _null_ dump_cache - _null_ ));
 
 /*
  * Symbolic values for provolatile column: these indicate whether the result