diff --git a/libs/checkpoint-sqlite/langgraph/cache/sqlite/__init__.py b/libs/checkpoint-sqlite/langgraph/cache/sqlite/__init__.py
index 9942a1228..258006c54 100644
--- a/libs/checkpoint-sqlite/langgraph/cache/sqlite/__init__.py
+++ b/libs/checkpoint-sqlite/langgraph/cache/sqlite/__init__.py
@@ -95,20 +95,23 @@ class SqliteCache(BaseCache[ValueT]):
         """Asynchronously set the cached values for the given keys and TTLs."""
         await asyncio.to_thread(self.set, mapping)
 
-    def delete(self, keys: Sequence[Namespace]) -> None:
-        """Delete the cached values for the given namespaces."""
-        if not keys:
-            return
+    def clear(self, namespaces: Sequence[Namespace] | None = None) -> None:
+        """Delete the cached values for the given namespaces.
+        If no namespaces are provided, clear all cached values."""
         with self._lock, self._conn:
-            placeholders = ",".join("?" for _ in keys)
-            self._conn.execute(
-                f"DELETE FROM cache WHERE (ns) IN ({placeholders})",
-                tuple(",".join(key) for key in keys),
-            )
+            if namespaces is None:
+                self._conn.execute("DELETE FROM cache")
+            else:
+                placeholders = ",".join("?" for _ in namespaces)
+                self._conn.execute(
+                    f"DELETE FROM cache WHERE (ns) IN ({placeholders})",
+                    tuple(",".join(key) for key in namespaces),
+                )
 
-    async def adelete(self, keys: Sequence[Namespace]) -> None:
-        """Asynchronously delete the cached values for the given namespaces."""
-        await asyncio.to_thread(self.delete, keys)
+    async def aclear(self, namespaces: Sequence[Namespace] | None = None) -> None:
+        """Asynchronously delete the cached values for the given namespaces.
+        If no namespaces are provided, clear all cached values."""
+        await asyncio.to_thread(self.delete, namespaces)
 
     def __del__(self) -> None:
         try:
diff --git a/libs/checkpoint/langgraph/cache/base/__init__.py b/libs/checkpoint/langgraph/cache/base/__init__.py
index 8f8660cca..c23e859fd 100644
--- a/libs/checkpoint/langgraph/cache/base/__init__.py
+++ b/libs/checkpoint/langgraph/cache/base/__init__.py
@@ -38,9 +38,11 @@ class BaseCache(ABC, Generic[ValueT]):
         """Asynchronously set the cached values for the given keys and TTLs."""
 
     @abstractmethod
-    def delete(self, keys: Sequence[Namespace]) -> None:
-        """Delete the cached values for the given keys."""
+    def clear(self, namespaces: Sequence[Namespace] | None = None) -> None:
+        """Delete the cached values for the given namespaces.
+        If no namespaces are provided, clear all cached values."""
 
     @abstractmethod
-    async def adelete(self, keys: Sequence[Namespace]) -> None:
-        """Asynchronously delete the cached values for the given keys."""
+    async def aclear(self, namespaces: Sequence[Namespace] | None = None) -> None:
+        """Asynchronously delete the cached values for the given namespaces.
+        If no namespaces are provided, clear all cached values."""
diff --git a/libs/checkpoint/langgraph/cache/memory/__init__.py b/libs/checkpoint/langgraph/cache/memory/__init__.py
index a6d858e80..7b10db051 100644
--- a/libs/checkpoint/langgraph/cache/memory/__init__.py
+++ b/libs/checkpoint/langgraph/cache/memory/__init__.py
@@ -56,13 +56,18 @@ class InMemoryCache(BaseCache[ValueT]):
         """Asynchronously set the cached values for the given keys."""
         self.set(keys)
 
-    def delete(self, keys: Sequence[Namespace]) -> None:
-        """Delete the cached values for the given namespaces."""
+    def clear(self, namespaces: Sequence[Namespace] | None = None) -> None:
+        """Delete the cached values for the given namespaces.
+        If no namespaces are provided, clear all cached values."""
         with self._lock:
-            for ns in keys:
-                if ns in self._cache:
-                    del self._cache[ns]
+            if namespaces is None:
+                self._cache.clear()
+            else:
+                for ns in namespaces:
+                    if ns in self._cache:
+                        del self._cache[ns]
 
-    async def adelete(self, keys: Sequence[Namespace]) -> None:
-        """Asynchronously delete the cached values for the given namespaces."""
-        self.delete(keys)
+    async def aclear(self, namespaces: Sequence[Namespace] | None = None) -> None:
+        """Asynchronously delete the cached values for the given namespaces.
+        If no namespaces are provided, clear all cached values."""
+        self.clear(namespaces)
diff --git a/libs/langgraph/langgraph/func/__init__.py b/libs/langgraph/langgraph/func/__init__.py
index 76599c671..143b1a2de 100644
--- a/libs/langgraph/langgraph/func/__init__.py
+++ b/libs/langgraph/langgraph/func/__init__.py
@@ -69,12 +69,12 @@ class TaskFunction(Generic[P, T]):
     def clear_cache(self, cache: BaseCache) -> None:
         """Clear the cache for this task."""
         if self.cache_policy is not None:
-            cache.delete(((CACHE_NS_WRITES, identifier(self.func) or "__dynamic__"),))
+            cache.clear(((CACHE_NS_WRITES, identifier(self.func) or "__dynamic__"),))
 
     async def aclear_cache(self, cache: BaseCache) -> None:
         """Clear the cache for this task."""
         if self.cache_policy is not None:
-            await cache.adelete(
+            await cache.aclear(
                 ((CACHE_NS_WRITES, identifier(self.func) or "__dynamic__"),)
             )
 
diff --git a/libs/langgraph/langgraph/pregel/__init__.py b/libs/langgraph/langgraph/pregel/__init__.py
index 286a98ddc..fe4f2c833 100644
--- a/libs/langgraph/langgraph/pregel/__init__.py
+++ b/libs/langgraph/langgraph/pregel/__init__.py
@@ -3008,7 +3008,7 @@ class Pregel(PregelProtocol):
                     ),
                 )
         # clear cache
-        self.cache.delete(namespaces)
+        self.cache.clear(namespaces)
 
     async def aclear_cache(self, nodes: Sequence[str] | None = None) -> None:
         """Asynchronously clear the cache for the given nodes."""
@@ -3027,7 +3027,7 @@ class Pregel(PregelProtocol):
                     ),
                 )
         # clear cache
-        await self.cache.adelete(namespaces)
+        await self.cache.aclear(namespaces)
 
 
 def _trigger_to_nodes(nodes: dict[str, PregelNode]) -> Mapping[str, Sequence[str]]: