diff --git a/components/playground/instance/tiflash_config.go b/components/playground/instance/tiflash_config.go
index b643931e69..0051a650a2 100644
--- a/components/playground/instance/tiflash_config.go
+++ b/components/playground/instance/tiflash_config.go
@@ -54,7 +54,7 @@ size = "1000M"
 [profiles]
 [profiles.default]
 load_balancing = "random"
-max_memory_usage = 10000000000
+max_memory_usage = 0
 use_uncompressed_cache = 0
 [profiles.readonly]
 readonly = 1
diff --git a/pkg/cluster/spec/tiflash.go b/pkg/cluster/spec/tiflash.go
index 0decb8c4a0..da271826cf 100644
--- a/pkg/cluster/spec/tiflash.go
+++ b/pkg/cluster/spec/tiflash.go
@@ -229,7 +229,7 @@ server_configs:
     users.readonly.quota: "default"
     users.readonly.networks.ip: "::/0"
     profiles.default.load_balancing: "random"
-    profiles.default.max_memory_usage: 10000000000
+    profiles.default.max_memory_usage: 0
     profiles.default.use_uncompressed_cache: 0
     profiles.readonly.readonly: 1
 `, cfg.DataDir, cfg.LogDir, cfg.TCPPort, cfg.HTTPPort, cfg.TiDBStatusAddrs, cfg.IP, cfg.FlashServicePort,