Update db_bdb.cpp

src/blockchain_db/berkeleydb/db_bdb.cpp

@@ -65,11 +65,23 @@ struct bdb_cur
         done = false;
     }
 
-  ~bdb_cur() { close(); }
+    ~bdb_cur()
+    {
+        close();
+    }
 
-  operator Dbc*() { return m_cur; }
-  operator Dbc**() { return &m_cur; }
-  Dbc* operator->() { return m_cur; }
+    operator Dbc*()
+    {
+        return m_cur;
+    }
+    operator Dbc**()
+    {
+        return &m_cur;
+    }
+    Dbc* operator->()
+    {
+        return m_cur;
+    }
 
     void close()
     {
@@ -105,7 +117,7 @@ const char* const BDB_OUTPUT_KEYS = "output_keys";
 
 const char* const BDB_SPENT_KEYS = "spent_keys";
 
-const int BUFFER_LENGTH	= 32 * 1024 * 1024;
+const int BUFFER_LENGTH = 4 * 1024 * 1024;
 
 template<typename T>
 struct Dbt_copy: public Dbt