diff --git a/core/state/database.go b/core/state/database.go
index 5e3d9a9d388a..3bb6ffdcd33a 100644
--- a/core/state/database.go
+++ b/core/state/database.go
@@ -19,6 +19,7 @@ package state
 import (
 	"errors"
 	"fmt"
+	"runtime"
 
 	"github.com/VictoriaMetrics/fastcache"
 	"github.com/ethereum/go-ethereum/common"
@@ -131,12 +132,14 @@ func NewDatabase(db ethdb.Database) Database {
 // large memory cache.
 func NewDatabaseWithConfig(db ethdb.Database, config *trie.Config) Database {
 	csc, _ := lru.New(codeSizeCacheSize)
-	return &cachingDB{
+	cdb := &cachingDB{
 		db:            trie.NewDatabaseWithConfig(db, config),
 		disk:          db,
 		codeSizeCache: csc,
 		codeCache:     fastcache.New(codeCacheSize),
 	}
+	runtime.SetFinalizer(cdb, (*cachingDB).finalizer)
+	return cdb
 }
 
 type cachingDB struct {
@@ -155,6 +158,11 @@ func (db *cachingDB) OpenTrie(root common.Hash) (Trie, error) {
 	return tr, nil
 }
 
+// must call Reset() to reclaim memory used by fastcache
+func (db *cachingDB) finalizer() {
+	db.codeCache.Reset()
+}
+
 // OpenStorageTrie opens the storage trie of an account.
 func (db *cachingDB) OpenStorageTrie(stateRoot common.Hash, addrHash, root common.Hash) (Trie, error) {
 	tr, err := trie.NewStateTrie(trie.StorageTrieID(stateRoot, addrHash, root), db.db)
diff --git a/trie/database.go b/trie/database.go
index 76ca188add9c..e0016b5198d6 100644
--- a/trie/database.go
+++ b/trie/database.go
@@ -301,9 +301,17 @@ func NewDatabaseWithConfig(diskdb ethdb.KeyValueStore, config *Config) *Database
 		}},
 		preimages: preimage,
 	}
+	runtime.SetFinalizer(db, (*Database).finalizer)
 	return db
 }
 
+// must call Reset() to reclaim memory used by fastcache
+func (db *Database) finalizer() {
+	if db.cleans != nil {
+		db.cleans.Reset()
+	}
+}
+
 // insert inserts a simplified trie node into the memory database.
 // All nodes inserted by this function will be reference tracked
 // and in theory should only used for **trie nodes** insertion.