memory-target

This is the error I see in standby server..
SQL> startup nomount
ORA-00845: MEMORY_TARGET not supported on this system
SQL> exit
Disconnected
[oracle@newmac dbs]$
 
Here is the initstand.ora
 
stand.__db_cache_size=213909504
stand.__java_pool_size=4194304
stand.__large_pool_size=4194304
stand.__oracle_base='/oracle/app/oracle'#ORACLE_BASE set from environment
stand.__pga_aggregate_target=251658240
stand.__sga_target=369098752
stand.__shared_io_pool_size=0
stand.__shared_pool_size=138412032
stand.__streams_pool_size=0
*.audit_file_dest='/oracle/app/oracle/admin/stand/adump'
*.audit_trail='db'
*.compatible='11.2.0.0.0'
*.control_files='/oracle/app/oracle/oradata/stand/control01.ctl','/oracle/app/oracle/flash_recovery_area/stand/control02.ctl'
*.db_block_size=8192
*.db_domain=''
*.db_file_name_convert='/oracle/app/oracle/oradata/dest','/oracle/app/oracle/oradata/stand'
*.db_name='dest'
*.db_recovery_file_dest='/oracle/app/oracle/flash_recovery_area'
*.db_recovery_file_dest_size=4039114752
*.diagnostic_dest='/oracle/app/oracle'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=standXDB)'
*.fal_client='stand'
*.fal_server='dest'
*.log_archive_config='dg_config=(dest,stand)'
*.log_archive_dest_1='location=/backup valid_for=(all_logfiles,all_roles) db_unique_name=stand'
*.log_archive_dest_2='service=dest valid_for=(online_logfile,primary_role) db_unique_name=dest'
*.log_archive_dest_state_2='defer'
*.log_file_name_convert='/oracle/app/oracle/oradata/dest','/oracle/app/oracle/oradata/stand'
*.memory_target=620756992
*.open_cursors=300
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.standby_file_management='AUTO'
*.undo_tablespace='UNDOTBS1'



This is the memory target parameter..

How can I adjust this..