DBA AWR System Time Percentages
Description:
Historic system time model values from the automated workload repository showing a breakdown of how much percent of 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, Time Split, 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 Summary
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 Percentages 22-Dec-2025 083614.xlsx
Report SQL
www.enginatics.com/reports/dba-awr-system-time-percentages/
Blitz Report™ import options
DBA_AWR_System_Time_Percentages.xml
Executive Summary
The DBA AWR System Time Percentages report provides a proportional breakdown of how the database spends its time. Instead of raw seconds, it shows percentages (e.g., “80% SQL Execution, 10% Parsing, 5% PL/SQL”). This is crucial for understanding the nature of the workload. For example, a system spending 40% of its time on “Hard Parse” indicates a code quality issue (lack of bind variables), whereas 90% “SQL Execution” suggests a need for SQL tuning or more hardware.
Business Challenge
- Workload Characterization: “Is our system mostly doing calculation (CPU) or waiting for data (I/O)?”
- Code Quality Audit: “Are we wasting resources on overhead tasks like parsing and connection management?”
- Tuning Focus: “Should we focus on optimizing PL/SQL loops or SQL queries?”
Solution
This report calculates the percentage contribution of each time model statistic to the total DB Time.
Key Features:
- SQL Execution Time %: Time spent actually running queries.
- Parse Time %: Time spent compiling SQL (Hard vs. Soft).
- PL/SQL Execution Time %: Time spent in procedural logic.
- Connection Management %: Time spent logging on/off.
Architecture
The report queries DBA_HIST_SYS_TIME_MODEL.
Key Tables:
DBA_HIST_SYS_TIME_MODEL: Historical time model statistics.
Impact
- Strategic Tuning: Directs tuning efforts to the area with the biggest potential ROI (e.g., fixing parsing issues can double throughput).
- Application Profiling: Helps developers understand the behavior of their application code.
- Anomaly Detection: A sudden spike in “Sequence Load” or “Failed Parse” indicates a specific application bug.
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.
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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.

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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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