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Home -> Community -> Mailing Lists -> Oracle-L -> waits vs. logons
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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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<DIV><FONT face=Arial size=2><SPAN class=658191819-04092002>I run the following
query to compare the total waits for a session verses the seconds logged
on:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=658191819-04092002></SPAN></FONT><FONT
face=Arial size=2><SPAN class=658191819-04092002></SPAN></FONT> </DIV>
<DIV><FONT face="Courier New" size=1><SPAN class=658191819-04092002>select
a.sid, a.ontime longon_secs, round(b.waittime) wait_secs<BR>from <BR>
(select sid, (sysdate - logon_time)*24*60*60 ontime<BR>
from v$session ) a,<BR> (select sid, sum(time_waited)/100
waittime<BR> from v$session_event <BR> group by sid)
b<BR>where a.sid = b.sid;<BR></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=658191819-04092002>I get the following
results:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=658191819-04092002></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=658191819-04092002> <FONT
face="Courier New" size=1> SID LONGON_SECS
WAIT_SECS<BR>---------- -----------
----------<BR>
1 595995
595989<BR>
2 595994
471204<BR>
3 595994
595585<BR>
4 595994
594580<BR>
5 595994
595492<BR>
6 595994
593639<BR>
9 595993
577157<BR>
14
4943
1303<BR>
24 595844
588441<BR>
26
1733
1728<BR>
27
5308
2478<BR>
29
517269
0<BR>
32 53 0<BR> 35 415158 13<BR> 50 140478 140371<BR> 51 719 507<BR>
56 14507 8706<BR> 59 2269 221</FONT></SPAN></FONT></DIV>
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Terrian, Tom INET: tterrian_at_daas.dla.mil Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Wed Sep 04 2002 - 15:59:40 CDT
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