diff --git a/spanner/session.go b/spanner/session.go
index 301135c..9964af6 100644
--- a/spanner/session.go
+++ b/spanner/session.go
@@ -435,7 +435,7 @@
 	MaxBurst:            10,
 	WriteSessions:       0.2,
 	HealthCheckWorkers:  10,
-	HealthCheckInterval: 5 * time.Minute,
+	HealthCheckInterval: 30 * time.Minute,
 }
 
 // errMinOpenedGTMapOpened returns error for SessionPoolConfig.MaxOpened < SessionPoolConfig.MinOpened when SessionPoolConfig.MaxOpened is set.