DBA AWR CPU Load (active session history) – Oracle EBS SQL Report
Oracle E-Business Suite SQL report from the Enginatics Library powered by Blitz Report™.
Overview
Aggregates active sessions by snapshot time to identify times with high CPU load over a specific ‘CPU Sessions From’ threshold value.
Report Parameters
From Time, To Time, CPU Sessions From, Session Type, Instance Id, Diagnostic Pack enabled, Container Data
Oracle EBS Tables Used
Report Categories
Related Reports
DBA AWR Wait Event Summary (active session history), DBA AWR Settings, DBA AWR Blocking Session Summary, DBA AWR Active Session History, DBA AWR System Metrics Summary, DBA SGA Active Session History, DBA AWR CPU vs Wait Time Summary, DBA SGA+PGA Memory Configuration, DBA AWR Wait Event Summary
Running This SQL Without Blitz Report
Some Oracle EBS SQL reports in this library require functions from the utility package xxen_util. Install it before running the SQL directly against your Oracle EBS database.
Download & Import Options
| Resource | Link |
|---|---|
| Excel Example Output | DBA AWR CPU Load (active session history) 22-Dec-2025 083150.xlsx |
| Blitz Report™ XML Import | DBA_AWR_CPU_Load_active_session_history.xml |
| Full SQL on Enginatics | www.enginatics.com/reports/dba-awr-cpu-load-active-session-history/ |
Executive Summary
The DBA AWR CPU Load (active session history) report is a targeted analysis tool for identifying CPU bottlenecks. By aggregating Active Session History (ASH) data, it highlights specific time intervals where the number of sessions actively using CPU exceeded a defined threshold. This helps DBAs pinpoint “CPU spikes” and drill down into the sessions responsible.
Business Challenge
- Server Sizing: “Do we need more CPU cores, or is the current usage just inefficient SQL?”
- Performance Degradation: “The system slows down every day at 10 AM. Is it CPU saturation?”
- Resource Hog Identification: Finding the specific user or background process consuming the most CPU cycles.
Solution
This report aggregates ASH samples where the session state is ‘ON CPU’.
Key Features:
- Threshold Filtering: The “CPU Sessions From” parameter allows filtering for intervals where CPU demand was high (e.g., > 8 active sessions on an 8-core machine).
- Time-Based Aggregation: Groups data by AWR snapshot time to show the load profile over time.
- Drill-Down Capable: Can be used in conjunction with other ASH reports to find the specific SQL IDs.
Architecture
The report queries DBA_HIST_ACTIVE_SESS_HISTORY.
Key Tables:
DBA_HIST_ACTIVE_SESS_HISTORY: The source of session state data.
Impact
- Cost Savings: Optimizing high-CPU queries can delay or eliminate the need for expensive hardware upgrades.
- Stability: Prevents CPU starvation for critical processes by identifying and tuning aggressive workloads.
- Capacity Planning: Provides empirical data on peak CPU utilization trends.
Useful Links
- Blitz Report™ – World’s Fastest Oracle EBS Reporting Tool
- Oracle Discoverer Replacement – Import Worksheets into Blitz Report™
- Oracle EBS Reporting Toolkits by Blitz Report™
- Blitz Report™ FAQ & Community Q&A
- Supply Chain Hub by Blitz Report™
- Blitz Report™ Customer Case Studies
- Oracle EBS Reporting Blog
- Oracle EBS Reporting Resource Centre
© 2026 Enginatics