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README.md

Description:

Aggregates active sessions by snapshot time to identify times with high CPU load over a specific 'CPU Sessions From' threshold value.

Parameters

From Time, To Time, CPU Sessions From, Session Type, Instance Id, Diagnostic Pack enabled

Used tables

gv$active_session_history

Categories

Enginatics

Related reports

DBA SGA Active Session History, DBA SGA Blocking Session 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 SGA CPU Load (active session history) 22-Dec-2025 084512.xlsx

Report SQL

www.enginatics.com/reports/dba-sga-cpu-load-active-session-history/

Blitz Report™ import options

DBA_SGA_CPU_Load_active_session_history.xml

Case Study & Technical Analysis

Abstract

The DBA SGA CPU Load (active session history) report is a specialized view of ASH data designed to visualize CPU consumption over time. By aggregating the count of active sessions that are ON CPU per sample time, it reconstructs a load profile that can be compared against the server's physical CPU core count. This helps identify specific intervals where the database was CPU-bound.

Technical Analysis

Core Logic

  • Filter: Selects records from GV$ACTIVE_SESSION_HISTORY where SESSION_STATE = 'ON CPU'.
  • Aggregation: Counts distinct session IDs per SAMPLE_TIME.
  • Threshold: The CPU Sessions From parameter allows filtering for spikes where the load exceeded a certain number of concurrent active sessions (e.g., greater than the number of CPU cores).

Interpretation

  • Load < Cores: The system is generally healthy; CPU is not the bottleneck.
  • Load > Cores: The system is CPU-bound. Sessions are runnable but waiting for CPU time (run queue). Latency increases.

Key View

  • GV$ACTIVE_SESSION_HISTORY: The source of the CPU usage samples.

Operational Use Cases

  • Capacity Planning: Determining if the server needs more CPUs to handle peak loads.
  • Spike Analysis: Correlating a CPU spike at 10:00 AM with a specific SQL_ID or Module.
  • Resource Manager: Validating if Resource Manager plans are effectively throttling CPU-hungry consumer groups.

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.

Blitz Report Pivots

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.

Blitz Report Dashboard

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.

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