slow peroformance

my application is running is very slow, i have anyalysed the main tables and checking the statistics in user_tables, i have got chain_cnt as nil , what else do i need to check on this veiw and what do i need to work around.
i am also trying to use explain plan command, here can't i do i for the complete user or do i need to go for each sql statement.

thanks,
ram

To start with run a STATSPACK report to get an overview of what extacly is proble. Read the docs below..

https://metalink.oracle.com/metalink...,1,1,helvetica

Explain Plan is for sql statement.

Do you have a base line statistics?

Tamil

How have you defined "Slow" ?

How many licks does it take to get to the center of a tootsy roll tootsy pop?