Add a comment about the initial default value of max_stack_depth.

diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 463b563b4b878d4cba51f9a1dc1c277955e6dfdb..97ed5b72474411466ed283389f1364f0602bf676 100644 (file)
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -10,7 +10,7 @@
  * Written by Peter Eisentraut <peter_e@gmx.net>.
  *
  * IDENTIFICATION
- *       $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.565 2010/07/22 01:22:33 rhaas Exp $
+ *       $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.566 2010/08/06 14:51:33 tgl Exp $
  *
  *--------------------------------------------------------------------
  */
@@ -1520,6 +1520,11 @@ static struct config_int ConfigureNamesInt[] =
                16384, 1024, MAX_KILOBYTES, NULL, NULL
        },
 
+       /*
+        * We use the hopefully-safely-small value of 100kB as the compiled-in
+        * default for max_stack_depth.  InitializeGUCOptions will increase it if
+        * possible, depending on the actual platform-specific stack limit.
+        */
        {
                {"max_stack_depth", PGC_SUSET, RESOURCES_MEM,
                        gettext_noop("Sets the maximum stack depth, in kilobytes."),