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Easy Oracle Automation
Chapter 4 -
Automatic Workload Repository and Automatic Database
Diagnostic Monitor

How Does AWR Compare Against STATSPACK?

natural join
   dba_hist_snapshot ;

The output of the script is shown below. It shows a list total of physical reads by datafile.  Note that the snapshots
are collected every half-hour.  Starting with this script, where clause criteria could easily be added to create a unique
time-series exception report.

SQL> @reads

BEGIN_INTERVAL_TIME       FILENAME                                    PHYRDS
------------------------- --------------------------------------     ----------
24-FEB-04 PM E:\ORACLE\ORA92\FSDEV10G\SYSTEM01.DBF         164,700
                          E:\ORACLE\ORA92\FSDEV10G\UNDOTBS01.DBF         26,082
                          E:\ORACLE\ORA92\FSDEV10G\SYSAUX01.DBF         472,008
                          E:\ORACLE\ORA92\FSDEV10G\USERS01.DBF            1,794 
                          E:\ORACLE\ORA92\FSDEV10G\T_FS_LSQ.OR            2,123

24-FEB-04 PM E:\ORACLE\ORA92\FSDEV10G\SYSTEM01.DBF         167,809
                          E:\ORACLE\ORA92\FSDEV10G\UNDOTBS01.DBF         26,248  
                          E:\ORACLE\ORA92\FSDEV10G\SYSAUX01.DBF         476,616 
                          E:\ORACLE\ORA92\FSDEV10G\USERS01.DBF            1,795 
                          E:\ORACLE\ORA92\FSDEV10G\T_FS_LSQ.ORA           2,244

The above text is an excerpt from:

Easy Oracle Automation
Oracle10g Automatic Storage, Memory and Diagnostic Features

ISBN 0-9745993-6-0

by Dr. Arun Kumar R.

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