public void Cache()
{
Native.leveldb_close(Database);
// open the DB with a cache that is not owned by LevelDB, then
// close DB and then free the cache
var options = Native.leveldb_options_create();
var cache = Native.leveldb_cache_create_lru((UIntPtr)64);
Native.leveldb_options_set_cache(options, cache);
Database = Native.leveldb_open(options, DatabasePath);
Native.leveldb_close(Database);
Database = IntPtr.Zero;
Native.leveldb_cache_destroy(cache);
}