diff --git a/ydb/core/tx/columnshard/engines/portions/constructor.cpp b/ydb/core/tx/columnshard/engines/portions/constructor.cpp
index 5125d60f292c..636a09b6332a 100644
--- a/ydb/core/tx/columnshard/engines/portions/constructor.cpp
+++ b/ydb/core/tx/columnshard/engines/portions/constructor.cpp
@@ -83,8 +83,11 @@ TPortionInfo TPortionInfoConstructor::Build(const bool needChunksNormalization)
     }
 
     result.Indexes = std::move(Indexes);
+    result.Indexes.shrink_to_fit();
     result.Records = std::move(Records);
+    result.Records.shrink_to_fit();
     result.BlobIds = std::move(BlobIds);
+    result.BlobIds.shrink_to_fit();
     result.Precalculate();
     return result;
 }