RE: File open waitLuis, Did you verify that your v$session.state says WAITING, not just WAITED? Because WAITED doesn't mean that your session is waiting. Otherwise compare the SQL execution plans and number of logical IOs+CPU usage (as John said) for the executed SQL statements for both "fast" and "slow" environments. Tanel. ----- Original Message ----- From: Luis Fernando Cerri To: john.kanagaraj@xxxxxxx ; tanel.poder.003@xxxxxxx ; ORACLE-L Sent: Friday, January 20, 2006 6:15 PM Subject: RE: File open wait Hi Tanel, John, Raj, Millsap and others following this thread. I gonna give you some news regarding the issue.