diff --git a/ethdb/leveldb/leveldb.go b/ethdb/leveldb/leveldb.go
index 378d4c3cd2..71ad8cd227 100644
--- a/ethdb/leveldb/leveldb.go
+++ b/ethdb/leveldb/leveldb.go
@@ -97,8 +97,11 @@ func New(file string, cache int, handles int, namespace string) (*Database, erro
 	// Open the db and recover any potential corruptions
 	db, err := leveldb.OpenFile(file, &opt.Options{
 		OpenFilesCacheCapacity: handles,
-		BlockCacheCapacity:     cache / 2 * opt.MiB,
-		WriteBuffer:            cache / 4 * opt.MiB, // Two of these are used internally
+
+		// BlockCache can be used for caching: data block, index block as well as
+		// filter block. The more capacity block cache has, the less disk hit we
+		// have.
+		BlockCacheCapacity:     cache * opt.MiB,
 		Filter:                 filter.NewBloomFilter(10),
 		DisableSeeksCompaction: true,
 	})