--- a/src/os/LevelDBStore.cc
+++ b/src/os/LevelDBStore.cc
@@ -156,9 +156,8 @@ void LevelDBStore::LevelDBTransactionImpl::set(
   buffers.push_back(to_set_bl);
   bufferlist &bl = *(buffers.rbegin());
   string key = combine_strings(prefix, k);
-  keys.push_back(key);
-  bat.Delete(leveldb::Slice(*(keys.rbegin())));
-  bat.Put(leveldb::Slice(*(keys.rbegin())),
+  bat.Delete(leveldb::Slice(key));
+  bat.Put(leveldb::Slice(key),
          leveldb::Slice(bl.c_str(), bl.length()));
 }

@@ -166,8 +165,7 @@ void LevelDBStore::LevelDBTransactionImpl::rmkey(const string &prefix,
                                                 const string &k)
 {
   string key = combine_strings(prefix, k);
-  keys.push_back(key);
-  bat.Delete(leveldb::Slice(*(keys.rbegin())));
+  bat.Delete(leveldb::Slice(key));
 }

 void LevelDBStore::LevelDBTransactionImpl::rmkeys_by_prefix(const string &prefix)
@@ -177,8 +175,7 @@ void LevelDBStore::LevelDBTransactionImpl::rmkeys_by_prefix(const string &prefix
        it->valid();
        it->next()) {
     string key = combine_strings(prefix, it->key());
-    keys.push_back(key);
-    bat.Delete(*(keys.rbegin()));
+    bat.Delete(key);
   }
 }

diff --git a/src/os/LevelDBStore.h b/src/os/LevelDBStore.h
index 4617c5c..dd248dd 100644
--- a/src/os/LevelDBStore.h
+++ b/src/os/LevelDBStore.h
@@ -175,7 +175,6 @@ public:
   public:
     leveldb::WriteBatch bat;
     list<bufferlist> buffers;
-    list<string> keys;
     LevelDBStore *db;

     LevelDBTransactionImpl(LevelDBStore *db) : db(db) {}