Add debug code to aid in memory-leak tracking: if SHOW_MEMORY_STATS is

defined then statistics about memory usage of all the global memory
contexts are printed after each commit.

Author: tglsfdc

src/backend/tcop/postgres.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.154 2000/04/30 21:29:23 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.155 2000/05/21 02:23:30 tgl Exp $
  *
  * NOTES
  *	  this is the "main" module of the postgres backend and
@@ -1452,7 +1452,7 @@ PostgresMain(int argc, char *argv[], int real_argc, char *real_argv[])
 	if (!IsUnderPostmaster)
 	{
 		puts("\nPOSTGRES backend interactive interface ");
-		puts("$Revision: 1.154 $ $Date: 2000/04/30 21:29:23 $\n");
+		puts("$Revision: 1.155 $ $Date: 2000/05/21 02:23:30 $\n");
 	}
 
 	/*
@@ -1631,6 +1631,11 @@ PostgresMain(int argc, char *argv[], int real_argc, char *real_argv[])
 				TPRINTF(TRACE_VERBOSE, "CommitTransactionCommand");
 			PS_SET_STATUS("commit");
 			CommitTransactionCommand();
+#ifdef SHOW_MEMORY_STATS
+			/* print global-context stats at each commit for leak tracking */
+			if (ShowStats)
+				GlobalMemoryStats();
+#endif
 		}
 		else
 		{

src/backend/utils/mmgr/aset.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mmgr/aset.c,v 1.26 2000/04/12 17:16:09 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mmgr/aset.c,v 1.27 2000/05/21 02:23:29 tgl Exp $
  *
  * NOTE:
  *	This is a new (Feb. 05, 1999) implementation of the allocation set
@@ -541,3 +541,41 @@ AllocSetDump(AllocSet set)
 {
 	elog(DEBUG, "Currently unable to dump AllocSet");
 }
+
+/*
+ * AllocSetStats
+ *		Displays stats about memory consumption of an allocset.
+ */
+void
+AllocSetStats(AllocSet set, const char *ident)
+{
+	long		nblocks = 0;
+	long		nchunks = 0;
+	long		totalspace = 0;
+	long		freespace = 0;
+	AllocBlock	block;
+	AllocChunk	chunk;
+	int			fidx;
+
+	AssertArg(AllocSetIsValid(set));
+
+	for (block = set->blocks; block != NULL; block = block->next)
+	{
+		nblocks++;
+		totalspace += block->endptr - ((char *) block);
+		freespace += block->endptr - block->freeptr;
+	}
+	for (fidx = 0; fidx < ALLOCSET_NUM_FREELISTS; fidx++)
+	{
+		for (chunk = set->freelist[fidx]; chunk != NULL;
+			 chunk = (AllocChunk) chunk->aset)
+		{
+			nchunks++;
+			freespace += chunk->size + ALLOC_CHUNKHDRSZ;
+		}
+	}
+	fprintf(stderr,
+			"%s: %ld total in %ld blocks; %ld free (%ld chunks); %ld used\n",
+			ident, totalspace, nblocks, freespace, nchunks,
+			totalspace - freespace);
+}

src/backend/utils/mmgr/mcxt.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/mmgr/mcxt.c,v 1.20 2000/01/26 05:57:30 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/mmgr/mcxt.c,v 1.21 2000/05/21 02:23:29 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -489,7 +489,7 @@ GlobalMemoryDump(GlobalMemory this)
 	if (PointerIsValid(context))
 		printf("\tsucessor=%s\n", GlobalMemoryGetName(context));
 
-	AllocSetDump(&this->setData);		/* XXX is this right interface */
+	AllocSetDump(&this->setData);
 }
 
 /*
@@ -511,9 +511,26 @@ DumpGlobalMemories()
 	{
 		GlobalMemoryDump(context);
 
-		context = (GlobalMemory) OrderedElemGetSuccessor(
-													 &context->elemData);
+		context = (GlobalMemory) OrderedElemGetSuccessor(&context->elemData);
 	}
 }
 
 #endif
+
+/*
+ * GlobalMemoryStats
+ *		Displays stats about memory consumption of all global contexts.
+ */
+void
+GlobalMemoryStats(void)
+{
+	GlobalMemory context;
+
+	context = (GlobalMemory) OrderedSetGetHead(&ActiveGlobalMemorySetData);
+
+	while (PointerIsValid(context))
+	{
+		AllocSetStats(&context->setData, GlobalMemoryGetName(context));
+		context = (GlobalMemory) OrderedElemGetSuccessor(&context->elemData);
+	}
+}

src/include/utils/mcxt.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: mcxt.h,v 1.16 2000/01/26 05:58:38 momjian Exp $
+ * $Id: mcxt.h,v 1.17 2000/05/21 02:23:28 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -54,6 +54,7 @@ extern void MemoryContextFree(MemoryContext context, Pointer pointer);
 extern MemoryContext MemoryContextSwitchTo(MemoryContext context);
 extern GlobalMemory CreateGlobalMemory(char *name);
 extern void GlobalMemoryDestroy(GlobalMemory context);
+extern void GlobalMemoryStats(void);
 
 
 #endif	 /* MCXT_H */

src/include/utils/memutils.h

@@ -13,7 +13,7 @@
  * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: memutils.h,v 1.34 2000/04/12 17:16:55 momjian Exp $
+ * $Id: memutils.h,v 1.35 2000/05/21 02:23:28 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -224,6 +224,7 @@ extern AllocPointer AllocSetRealloc(AllocSet set, AllocPointer pointer,
 				Size size);
 
 extern void AllocSetDump(AllocSet set);
+extern void AllocSetStats(AllocSet set, const char *ident);
 
 
 #endif	 /* MEMUTILS_H */