-bash-3.2$ sqlplus / as sysdba
SQL*Plus: Release 126.96.36.199.0 Production on Wed Aug 29 12:18:54 2012
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Oracle Database 11g Enterprise Edition Release 188.8.131.52.0 – 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> recover managed standby database cancel;
Media recovery complete.
SQL> alter database open read only;
SQL> alter database recover managed standby database disconnect
Now your Database is ready with read time apply with read only mode.!!!!!!!