diff --git a/.github/config/tikv_rawkv.toml b/.github/config/tikv_rawkv.toml
index 3ba57d5eea..c339b48639 100644
--- a/.github/config/tikv_rawkv.toml
+++ b/.github/config/tikv_rawkv.toml
@@ -2,7 +2,7 @@
 
 [raftstore]
 # set store capacity, if no set, use disk capacity.
-capacity = "8G"
+capacity = "6G"
 pd-heartbeat-tick-interval = "2s"
 pd-store-heartbeat-tick-interval = "5s"
 split-region-check-tick-interval = "1s"
diff --git a/.github/config/tikv_txnkv.toml b/.github/config/tikv_txnkv.toml
index b3e45f9f99..e327632e58 100644
--- a/.github/config/tikv_txnkv.toml
+++ b/.github/config/tikv_txnkv.toml
@@ -2,7 +2,7 @@
 
 [raftstore]
 # set store capacity, if no set, use disk capacity.
-capacity = "8G"
+capacity = "6G"
 pd-heartbeat-tick-interval = "2s"
 pd-store-heartbeat-tick-interval = "5s"
 split-region-check-tick-interval = "1s"