message: Enlarge the default block cache size
diff: @@ -45,7 +45,7 @@ DEFINE_string(part_man_type,
  */
  // BlockBasedTable block_cache
  -DEFINE_int64(rocksdb_block_cache, 4,
  +DEFINE_int64(rocksdb_block_cache, 1024,
  "The default block cache size used in BlockBasedTable. The unit is MB");
  