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;
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
---------- ----------- ----------
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
