From 066254cea117a5a40d21401f754c83cc163378ae Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Mon, 31 Mar 2014 13:06:26 -0400
Subject: [PATCH] Count buffers dirtied due to hints in
pgBufferUsage.shared_blks_dirtied.
Previously, such buffers weren't counted, with the possible result that
EXPLAIN (BUFFERS) and pg_stat_statements would understate the true
number of blocks dirtied by an SQL statement.
Back-patch to 9.2, where this counter was introduced.
Amit Kapila
---
src/backend/storage/buffer/bufmgr.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c
index 19eecab4c28..4e46ddbba29 100644
--- a/src/backend/storage/buffer/bufmgr.c
+++ b/src/backend/storage/buffer/bufmgr.c
@@ -2707,6 +2707,7 @@ MarkBufferDirtyHint(Buffer buffer, bool buffer_std)
if (dirtied)
{
VacuumPageDirty++;
+ pgBufferUsage.shared_blks_dirtied++;
if (VacuumCostActive)
VacuumCostBalance += VacuumCostPageDirty;
}
--
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