Unfortunately, users do not have infinite capacity for waiting, at least not
my users.
--
Mladen Gogala
Oracle DBA
> -----Original Message-----
> From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] On
> Behalf Of Cary Millsap
> Sent: Wednesday, September 17, 2003 11:10 AM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: wait event question
>
>
> ...58 minutes if I've calculated correctly. And yes, you're
> right: if you have 50 sessions and 49 are waiting for 1
> minute each, then you have 49 minutes of waiting. Any system
> has an infinite capacity for waiting.
>
> In case you pick up the book "Optimizing Oracle Performance,"
> this phenomenon (what can you do with information like this?)
> is the subject of pages 210-217.
>
>
> Cary Millsap
> Hotsos Enterprises, Ltd.
> http://www.hotsos.com
>
> Upcoming events:
> - Hotsos Clinic 101 in Sydney
> - Hotsos Symposium 2004, March 7-10 Dallas
> - Visit www.hotsos.com for schedule details...
>
>
> -----Original Message-----
> rgaffuri_at_cox.net
> Sent: Tuesday, September 16, 2003 3:40 PM
> To: Multiple recipients of list ORACLE-L
>
> below means i have about 50 minutes of waits right? this is
> over 3 hours. This is total waits right? So if I have 50
> sessions running and 49 are waiting for 1 minute each, I have
> 49 minutes of waits right?
>
> Top 5 Wait Events
> ~~~~~~~~~~~~~~~~~
> Wait %
> Total
> Event Waits Time (cs)
> Wt Time
> -------------------------------------------- ------------ ------------
> -------
> log file parallel write 19,088 145,072
> 38.38
> db file scattered read 118,363 91,804
> 24.29
> db file sequential read 269,416 55,038
> 14.56
> log file sync 3,929 34,053
> 9.01
> enqueue 96 23,852
> 6.31
>
> -------------------------------------------------------------
>
> Wait Events for DB: BOBAIRD Instance: bobaird Snaps: 1 -13
> -> cs - centisecond - 100th of a second
> -> ms - millisecond - 1000th of a second
> -> ordered by wait time desc, waits desc (idle events last)
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: <rgaffuri_at_cox.net
> INET: rgaffuri_at_cox.net
>
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Cary Millsap
> INET: cary.millsap_at_hotsos.com
>
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--
Author: Mladen Gogala
INET: mladen_at_wangtrading.com
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Received on Wed Sep 17 2003 - 10:54:42 CDT
