From 3b07182e613a0e63ff662e3dc7f820f010923ec7 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Thu, 2 Apr 2009 19:57:19 +0000
Subject: [PATCH] Give a better error message when trying to change
"effective_io_concurrency" on systems without posix_fadvise().
---
src/backend/utils/misc/guc.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index ecb9505aea7..47cb894e8ed 100644
--- 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 1.498 2009/04/02 03:51:43 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.499 2009/04/02 19:57:19 momjian Exp $
*
*--------------------------------------------------------------------
*/
@@ -1713,7 +1713,13 @@ static struct config_int ConfigureNamesInt[] =
},
{
- {"effective_io_concurrency", PGC_USERSET, RESOURCES,
+ {"effective_io_concurrency",
+#ifdef USE_PREFETCH
+ PGC_USERSET,
+#else
+ PGC_INTERNAL,
+#endif
+ RESOURCES,
gettext_noop("Number of simultaneous requests that can be handled efficiently by the disk subsystem."),
gettext_noop("For RAID arrays, this should be approximately the number of drive spindles in the array.")
},
--
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