RE: Tuning I/O-related wait - Metalink Note: 223117.1
- From: "Roger Xu" <roger_xu@xxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 9 Nov 2004 15:51:26 -0600
Thank y'all.
-----Original Message-----
From: Andy Rivenes [ mailto:arivenes@xxxxxxxx]
Sent: Tuesday, November 09, 2004 3:53 PM
To: Roger Xu; oracle-l@xxxxxxxxxxxxx
Subject: RE: Tuning I/O-related wait - Metalink Note: 223117.1
You can't tell from this. You need to look at the session or transaction
level and create a resource profile from that information. At the system
level you're just guessing and with flawed information.
At 01:19 PM 11/9/2004, Roger Xu wrote:
>Why there is no "Top 5 Wait Events" in our statspack report?
>But we have:
>Top 5 Timed Events
>~~~~~~~~~~~~~~~~~~ % Total
>Event Waits Time (s) Ela Time
>-------------------------------------------- ------------ ----------- --------
>CPU time 20,014 41.90
>db file sequential read 12,629,049 17,830 37.33
>log file sync 223,490 4,221 8.84
>enqueue 4,977 2,711 5.68
>db file parallel write 27,227 1,082 2.27
> -------------------------------------------------------------
>
>
>I guess "db file sequential read" is our problem. Any comments?
>
>Thanks,
>
>Roger
Andy Rivenes
Email: arivenes@xxxxxxxx
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