How to view the process in oracle is running?

Question

Hi!
i'm writing a procedure. That takes 15 mins to complete. Now, i want to check whether the process is running or the process is hanged or some other problem occurs. Is there any command from sql prompt that shows the status?
Waiting for your reply.
Thanks.
Satyaki De.

Answer 1

If the process completes (in 15 minutes), how can it be hanging? :-)
Hanging is along the lines of waiting forever on a fast object reuse enqueue... sigh
The view I usually use are:
- v$session_event to give me an idea what the session is doing
- v$session_wait to tell me what the session is waiting for on right now (and how long has it been waiting)
- v$session and v$sqltext to tell me what the current active SQL is (if applicable)
- and if there is a SQL, looking at v$sql_plan for the execution plan
But then there can also be nothing really wrong with the SQL for example, but how it is used. E.g. PL/SQL code does multiple passes through the same data set. In which case also have a look at v$sess_io to see what the I/O is like. A 100% cache hit ratio should set off a fe alarm bells. Or having a look at v$sesstat at the session statistics.
There is no single view or single query that can tell you "here, this is the problem!".
You need to look at at WHAT the process is doing and then determine which of these could be the problem. And it may turn out that the problem is in the actual logic of the process and not the way the process is executed.