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@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxx > 650-858-1557 > www.singingsql.com > > Quoting Kean Jacinta <jacintakean@xxxxxxxxx>: > > > 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 > > > > > > > > __________________________________ > > Do you Yahoo!? > > Yahoo! Finance: Get your refund fast by filing > online. > > http://taxes.yahoo.com/filing.html > > > ---------------------------------------------------------------- > > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > > > ---------------------------------------------------------------- > > To unsubscribe send email to: > oracle-l-request@xxxxxxxxxxxxx > > put 'unsubscribe' in the subject line. > > -- > > Archives are at > //www.freelists.org/archives/oracle-l/ > > FAQ is at > //www.freelists.org/help/fom-serve/cache/1.html > > > ----------------------------------------------------------------- > > > > ---------------------------------------------------------------- > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > ---------------------------------------------------------------- > To unsubscribe send email to: > oracle-l-request@xxxxxxxxxxxxx > put 'unsubscribe' in the subject line. > -- > Archives are at > //www.freelists.org/archives/oracle-l/ > FAQ is at > //www.freelists.org/help/fom-serve/cache/1.html > ----------------------------------------------------------------- __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------