diff --git a/cmd/postgres_exporter/postgres_exporter.go b/cmd/postgres_exporter/postgres_exporter.go
index 36c524c8e..b4f5e6c4b 100644
--- a/cmd/postgres_exporter/postgres_exporter.go
+++ b/cmd/postgres_exporter/postgres_exporter.go
@@ -971,7 +971,7 @@ func NewServer(dsn string, opts ...ServerOpt) (*Server, error) {
 		return nil, err
 	}
 	db.SetMaxOpenConns(1)
-	db.SetMaxIdleConns(1)
+	db.SetMaxIdleConns(-1)
 
 	level.Info(logger).Log("msg", "Established new database connection", "fingerprint", fingerprint)