diff --git a/python/ray/utils.py b/python/ray/utils.py
index 12942d92c..2704e07cc 100644
--- a/python/ray/utils.py
+++ b/python/ray/utils.py
@@ -409,21 +409,6 @@ def get_system_memory():
     return psutil_memory_in_bytes
 
 
-def get_cached_memory():
-    """Return the currently cached memory in bytes
-
-    Returns:
-        The total amount of cached memory
-    """
-    # Try to accurately figure out the cached memory.
-    psutil_virtual_memory = psutil.virtual_memory()
-    psutil_cached_memory_in_bytes = 0
-    if hasattr(psutil_virtual_memory, "cached"):
-        psutil_cached_memory_in_bytes = psutil_virtual_memory.cached
-
-    return psutil_cached_memory_in_bytes
-
-
 def _get_docker_cpus(
         cpu_quota_file_name="/sys/fs/cgroup/cpu/cpu.cfs_quota_us",
         cpu_share_file_name="/sys/fs/cgroup/cpu/cpu.cfs_period_us",
@@ -551,11 +536,7 @@ def estimate_available_memory():
         and total memory.
 
     """
-    # Linux, BSD has cached memory, which should
-    # also be considered as unused memory
-    # consider half of cached memory can be recycled.
-    # https://gitlab.com/procps-ng/procps/-/blob/master/proc/sysinfo.c#L805
-    return get_system_memory() - get_used_memory() + get_cached_memory() / 2
+    return get_system_memory() - get_used_memory()
 
 
 def get_shared_memory_bytes():