Hi Nandini,
Did you do a root cause analysis as to why the Oracle DB crash. Now if you have decided to install a new Oracle Instance than simply shutdown the IS . Go to the directory /IntegrationServer/config/jdbc/pool and then delete the .xml that was created to configure the JDBC pool connecting to Oracle.
Create a DB schema for use with webMethods components like IS , TN etc.Once done start the DB configurator and execute the scripts for IS, TN etc as per your needs.
Now start your IS , it will give some exceptions for not being able to connect to a DB. You can now configure the IS with the Oracle DB.
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