From 40b9b957694cf7749c420c6c51a7e1d3c9b1fec1 Mon Sep 17 00:00:00 2001
From: Robert Haas
Date: Tue, 27 Mar 2012 14:52:37 -0400
Subject: New GUC, track_iotiming, to track I/O timings.

Currently, the only way to see the numbers this gathers is via
EXPLAIN (ANALYZE, BUFFERS), but the plan is to add visibility through
the stats collector and pg_stat_statements in subsequent patches.

Ants Aasma, reviewed by Greg Smith, with some further changes by me.
---
 src/backend/utils/misc/guc.c                  | 9 +++++++++
 src/backend/utils/misc/postgresql.conf.sample | 1 +
 2 files changed, 10 insertions(+)

(limited to 'src/backend/utils')

diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 3d2fe3ebc87..8ea391a8e6c 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -1018,6 +1018,15 @@ static struct config_bool ConfigureNamesBool[] =
 		true,
 		NULL, NULL, NULL
 	},
+	{
+		{"track_iotiming", PGC_SUSET, STATS_COLLECTOR,
+			gettext_noop("Collects timing information for database IO activity."),
+			NULL
+		},
+		&track_iotiming,
+		false,
+		NULL, NULL, NULL
+	},
 
 	{
 		{"update_process_title", PGC_SUSET, STATS_COLLECTOR,
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index 96da086b0f4..cbae3bfb228 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -424,6 +424,7 @@
 
 #track_activities = on
 #track_counts = on
+#track_iotiming = off
 #track_functions = none			# none, pl, all
 #track_activity_query_size = 1024 	# (change requires restart)
 #update_process_title = on
-- 
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