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Database Tuning (MOSC)

db file sequential read

May 27, 2014 9:20AM edited Jun 3, 2014 9:44AM in Database Tuning (MOSC) 4 commentsAnswered ✓

Hi all,

on 11.2.0.3 , I ran AWRRPT and I have this :

	Snap Id	Snap Time	Sessions Curs/Sess
	--------- ------------------- -------- ---------
Begin Snap:	22153 27-May-14 13:30:13	60	2.3
End Snap:	22154 27-May-14 14:00:20	60	2.3
Elapsed:	30.12 (mins)
DB Time:	1.25 (mins)

Top 5 Timed Foreground Events

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	Avg
	wait % DB
Event	Waits	Time(s) (ms) time Wait Class

------------------------------ ------------ ----------- ------ ------ ----------

DB CPU	41	54.8
direct path read	2,941	11	4 15.0 User I/O
db file sequential read	4,969	11	2 14.8 User I/O
db file scattered read	550	9	16 11.7 User I/O
Disk file operations I/O	1,292	2	1	2.4 User I/O

I want to find the file that has db file sequential read problem. Then I run the following but nothing :

0

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