Question: I need to understand how
the awrddrpt.sql script is used. Can you describe the
awrddrpt.sql script output?
Answer: Also see my notes on the
awrinfo.sql script.
The awrddrpt.sql script is the AWR "diff" report for
comparing two AWR reports.
The awrddrpt.sql script is located in the
$ORACLE_HOME/rdbms/admin directory. This awrddrpt.sql
script compares two time periods. To do this, the
awrddrpt.sql script accepts four snapshot values for the
first AWR report. Next, the awrddrpt.sql script
accepts another start snapshot and end snapshot.
Once the four snapshot numbers are collected, the
awrddrpt.sql script creates two AWR reports and then
compares the two reports. The awrddrpt.sql script is
very useful for comparing performance during two elapsed
time periods.
For example, is we wanted to compare the period between
3:00 PM-4:00 PM for Wednesday to the same time period on
Thursday, we could use the awrddrpt.sql script.
Specify the First Pair of Begin and End
Snapshot Ids
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter value for begin_snap: 13747
First Begin Snapshot Id
specified: 13747
Enter value for end_snap: 13749
First End Snapshot Id specified: 13748
Specify the
Second Pair of Begin and End Snapshot Ids
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter value for begin_snap2: 13915
Second Begin Snapshot
Id specified: 13915
Enter value for end_snap2: 13917
Second End Snapshot Id specified: 13916
Here is an
example of an awrddrpt.sql report showing how two
AWR reports are compared.
