yep, look at CPU used by this session in V$sesstat.

CPU + WAIT should get close to the logon_secs. There are a number of reasons 
why it can't and shouldn't but for simplicity go with it.

Anjo.


On Wednesday 04 September 2002 22:59, you wrote:
> I run the following query to compare the total waits for a session verses
> the seconds logged on:
>
> select a.sid, a.ontime longon_secs, round(b.waittime) wait_secs
> from
>   (select sid, (sysdate - logon_time)*24*60*60  ontime
>    from   v$session ) a,
>   (select sid, sum(time_waited)/100 waittime
>    from v$session_event
>    group by sid) b
> where a.sid = b.sid;
>
> I get the following results:
>
>        SID LONGON_SECS  WAIT_SECS
> ---------- ----------- ----------
>          1      595995     595989
>          2      595994     471204
>          3      595994     595585
>          4      595994     594580
>          5      595994     595492
>          6      595994     593639
>          9      595993     577157
>         14        4943       1303
>         24      595844     588441
>         26        1733       1728
>         27        5308       2478
>         29      517269          0
>         32          53          0
>         35      415158         13
>         50      140478     140371
>         51         719        507
>         56       14507       8706
>         59        2269        221
>
> I am very much a novice when it comes to wait statistics.  When a session,
> for example #51, has been logged on for 719 seconds but has experienced
> only 507 wait seconds, what did it do the rest of the time?  I am assuming
> some kind of work?  Any way to determine what?
>
> Tom


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Author: Anjo Kolk
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