DBA AWR System Time Summary
Description:
Historic system time model values from the automated workload repository showing how the database time was spent e.g. on excuting SQL, PL/SQL or Java code, parsing statements etc..
To see data in this report based on dba_hist_sys_time_model, set the following: alter session set container=PDB1; alter system set awr_pdb_autoflush_enabled=true;
https://www.enginatics.com/blog/updated-dba-awr-blitz-reports-now-work-with-plugglable-databases/
Parameters
Date From, Date To, Display Mode, Diagnostic Pack enabled, Container Data
Used tables
dba_hist_snapshot, dba_hist_sys_time_model
Categories
Related reports
DBA AWR CPU vs Wait Time Summary, DBA AWR System Time Percentages
Dependencies
If you would like to try one of these Oracle EBS SQLs without having Blitz Report installed, note that some of the reports require functions from utility package xxen_util.
Example Report
DBA AWR System Time Summary 13-Jul-2018 173230.xlsx
Report SQL
www.enginatics.com/reports/dba-awr-system-time-summary/
Blitz Report™ import options
DBA_AWR_System_Time_Summary.xml
Executive Summary
The DBA AWR System Time Summary report quantifies the absolute time spent on various database activities. While percentages are useful for composition, absolute values (seconds or microseconds) are necessary for capacity planning and quantifying the impact of changes. For example, knowing that “SQL Execution” dropped from 50,000 seconds to 20,000 seconds proves the success of a tuning exercise.
Business Challenge
- Quantifying Improvement: “We added an index. How many CPU seconds did we save per hour?”
- Capacity Planning: “Our workload is growing by 500 CPU-seconds per week. When will we max out the server?”
- Billing/Chargeback: “How much database time is the ‘Payroll’ module consuming?”
Solution
This report displays the raw values from the Oracle Time Model.
Key Features:
- DB CPU: Total CPU time used by the database.
- DB Time: Total time spent in database calls (CPU + Wait).
- Background CPU: CPU used by background processes (LGWR, DBWR).
Architecture
The report queries DBA_HIST_SYS_TIME_MODEL.
Key Tables:
DBA_HIST_SYS_TIME_MODEL: Stores cumulative time values.DBA_HIST_SNAPSHOT: Used to calculate deltas between snapshots.
Impact
- ROI Justification: Provides hard numbers to justify hardware purchases or consulting fees.
- Trend Analysis: Tracks the growth of specific workload components over months or years.
- Performance Baselines: Establishes a “normal” baseline for comparison during incidents.
Oracle E-Business Suite Reporting Library
We provide an open source Oracle EBS SQLs as a part of operational and project implementation support toolkits for rapid Excel reports generation.
Blitz Report™ is based on Oracle EBS forms technology, and hence requires minimal training. There are no data or performance limitations since the output files are created directly from the database without going through intermediate file formats such as XML.
Blitz Report can be used as BI Publisher and Oracle Discoverer replacement tool. Standard Oracle BI Publisher and Discoverer reports can also be imported into Blitz Report for immediate output to Excel. Typically, reports can be created and version tracked within hours instead of days. The concurrent request output automatically opens upon completion without the need for re-formatting.
The Filters, Columns, Rows and Values fields are used to create and deliver the data in pivot table format with full drill down to details.

The Excel template upload functionality in Blitz Report allows users to create their own layouts by uploading an Excel template with additional sheets and charts, automatically refreshed when the report runs again. This allows to create custom dashboards and more advanced visualizations of report data.

You can download and use Blitz Report free of charge for your first 30 reports.
The installation and implementation process usually takes less than 1 hour; you can refer to our installation and user guides for specific details.
If you would like to optimize your Oracle EBS implementation and or operational reporting you can visit www.enginatics.com to review great ideas and example usage in blog. Or why not try for yourself in our demo environment.
Useful Links
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