From 76dd728c97a8db67ad5582ef2d8cf180c6893da6 Mon Sep 17 00:00:00 2001
From: Thomas Menard <tmenard@pelardon.itcrowd.pasteur.fr>
Date: Wed, 10 Feb 2016 10:40:48 +0100
Subject: [PATCH] postgres plugin bgwriter stats

Add pg_stat_bg_writer stats
---
 plugins/inputs/postgresql/postgresql.go | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/plugins/inputs/postgresql/postgresql.go b/plugins/inputs/postgresql/postgresql.go
index 3a9815af6..e65cbf3a2 100644
--- a/plugins/inputs/postgresql/postgresql.go
+++ b/plugins/inputs/postgresql/postgresql.go
@@ -95,6 +95,28 @@ func (p *Postgresql) Gather(acc telegraf.Accumulator) error {
 		}
 	}
 
+	query = `SELECT * FROM pg_stat_bgwriter`
+	
+	rows, err := db.Query(query)
+	if err != nil {
+		return err
+	}
+
+	defer rows.Close()
+
+	// grab the column information from the result
+	p.OrderedColumns, err = rows.Columns()
+	if err != nil {
+		return err
+	}
+
+	for rows.Next() {
+		err = p.accRow(rows, acc)
+		if err != nil {
+			return err
+		}
+	}
+
 	return rows.Err()
 }