How to find the execution time

Hi
I don't know whether it is possible in Oracle or not?
Say i have got around 20 odd Views in my DB and couple of them based on Materialized View which is again created by joining more than 5 based tables.
Even most of the Views are also created by joining base tables and MV's.
When i execute Select count(*) from <viewname>;
I do get the count of rows and on avg each view returns more that 30lacs row.
And when i excute select * from <View_name> by setting the Time on.
It takes more than 2 hours to return the rows.I know the elapsed time of a query do depend of external factors as well such as number of users using the DB Object used in thoe views,Number of process involved and all.
And therefore in order to gather the elapsed time of each and every view will take more than a week .
I would appreciate if anyone can provide me a better approach or even a shell script or something like that which will give me the elapsed time of all the views if i query (Select * from <view_name>);
Thanks in advance.
Vineet

But to SomeoneElse's point, if you are running
SELECT * FROM view_namefrom SQL*Plus, what you are primarily measuring is how fast your network is (because you're spending a great deal of time sending data from the database to the client) and the speed of the SQL*Plus client on your machine (which has to fetch that data, which may have to format and display that data, etc.) It is not a particularly meaningful metric. If you tuned the client machine so that SQL*Plus wasn't displaying the data, if you increased the fetch size, etc. you could drastically decrease the time it would take to send all the data to your client machine, but that is probably not going to constitute tuning for anyone other than you (i.e. you might see a halving of run time while everyone else saw no change).
Beyond that, doing a SELECT * with no criteria is likely to involve execution plans that no one else will see, data access patterns no one else will see, etc. which just makes the benchmark you are proposing irrelevent.
If you really, really want to measure how quickly your client can pull the data from all the views, you could of course let that run for a week. But the number wouldn't mean anything.
Justin

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