RecycleBin is already a static parameter in Oracle 11g and cannot be modified online

[[email protected] ~]$ sqlplus/as sysdbasql*plus:release 11.2.0.4.0 Production on Mon Apr 17:19:32 2015Copyrigh  T (c) 1982, Oracle. All rights reserved. Connected to an idle instance. Sql> Startup ORACLE instance started. Total System Global area 1068937216 bytesfixed size 2260088 bytesvariable size 612369288 byte Sdatabase buffers 448790528 Bytesredo buffers 5517312 bytesdatabase mounted. Database opened.        sql> sql> sql> sql> sql> sql> sql> show parameter Recycname TYPE                  VALUE-----------------------------------------------------------------------------buffer_pool_recycle  Stringdb_recycle_cache_size Big integer 0recyclebin string onsql> alter System set Recyclebin=off;alter system set Recyclebin=off *error at line 1:ora-02096:specif IED initialization parameter is not Modifiable with thisoptionsql> alter system set Recyclebin=off Scope=both;alter system set Recyclebin=off Scope=both *error at line 1:ora-02096:specified initialization parameter isn't modifiable with Thisop Tionsql> alter system set Recyclebin=off Scope=spfile; System altered.  Sql>

RecycleBin is already a static parameter in Oracle 11g and cannot be modified online