Dear: Dan Tow
Now i really get it.I should visit OTN network often,
since i am not familiar with lot's of fundamental
concept abt oracle.
THANK AGAIN :)
JKean
- Dan Tow <dantow_at_singingsql.com> wrote:
> Here's how it looks based on the V$ tables that
> track these (The OracleXX
> Reference is a good source for this stuff, and the
> Concepts manual contains the
> authoritative definitions - these are all available
> online for free if you sign
> up with Oracle's OTN network.):
>
> A connection is how you establish a session - they
> map one-to-one for user
> sessions (not counting those background sessions
> like SMON), with the
> connection being what Net8 pays attention to, and
> the session being what the
> RDBMS pays attention too, roughly. A user session
> can be waiting to be asked to
> do work for the application (status=INACTIVE), or it
> can be executing SQL.
>
> Every session should have a process, but with MTS a
> process can handle multiple
> sessions. The process is what you see from the point
> of view of your OS, for
> example with the ps command from UNIX.
>
> Applications can have multiple sessions (and
> connections) where they choose,
> sometimes for security reasons, sometimes to
> maintain independent commit
> cycles. the V$SESSION table gives the OS process ID
> of the *client* process
> (the application process) in the PROCESS column. If
> you can identify the client
> process ID, you can see the number of sessions it
> has with a query on
> PROCESS=<PIDYouFound>. This works especially well in
> UNIX - I think the PIDs
> are kind of funky for Windows apps.
>
> Yours,
>
> Dan Tow
> dantow_at_singingsql.com
> 650-858-1557
> www.singingsql.com
>
> Quoting Kean Jacinta <jacintakean_at_yahoo.com>:
>
> > Dear : All
> >
> > Sorry if my question sound stupid. I really need
> to
> > understand the diff between a session, a
> connection
> > and a process.
> >
> > 1) An application connected to oracle ...is that
> > called a connection or a session or a process ?
> >
> >
> > Thank
> >
> > JKean
> >
> >
> >
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Received on Wed Feb 11 2004 - 01:11:29 CST
