diff --git a/be/src/runtime/memory/lru_cache_policy.h b/be/src/runtime/memory/lru_cache_policy.h
index c06a6a03982011..a33fa0cb262416 100644
--- a/be/src/runtime/memory/lru_cache_policy.h
+++ b/be/src/runtime/memory/lru_cache_policy.h
@@ -254,7 +254,11 @@ class LRUCachePolicy : public CachePolicy {
         if (_cache == ExecEnv::GetInstance()->get_dummy_lru_cache()) {
             return 0;
         }
-
+        if (!_enable_prune) {
+            LOG(INFO) << "[MemoryGC] " << type_string(_type)
+                      << " cache prune disabled, so could not adjust capacity to free memory";
+            return 0;
+        }
         size_t old_capacity = get_capacity();
         int64_t old_mem_consumption = mem_consumption();
         int64_t old_usage = get_usage();