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Using HTTP Server Logs and a Spreadsheet to Analyse Performance Issues in Fusion Middleware (Doc ID 1560439.1)

Last updated on AUGUST 19, 2020

Applies to:

Oracle HTTP Server - Version 11.1.1.2.0 to 11.1.2.0.0 [Release Oracle11g]
Oracle Fusion Middleware - Version 11.1.1.2.0 to 11.1.2.0.0 [Release Oracle11g]
Information in this document applies to any platform.

Purpose

This note will show you how to use basic spreadsheet functions to analyse the access logs of Oracle HTTP Server (OHS) in order to understand the nature of a performance problem.  The examples below uses Microsoft Excel, but any spreadsheet software program could be used which has similar functionality.

The examples demonstrate a performance issue that appeared within an Oracle Portal/Java Application system but the techniques can be applied to any system that uses OHS in the Web Tier.

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps
 Introduction
 Step 1.   Change the OHS log Format
 Step 2.   Collect data for a period around the time performance issues are experienced
 Step 3.   Import the file into your spreadsheet (For Excel it is important you do it this way)
 Step 4.   Delete or at least hide columns of no interest.
 Step 5.   Trim the Date field
 Step 6.   Expand Column Display
 Analysis Examples
 A)  Find out which URL's are slow
 B)  Find out how frequently the slow URLs are slow
 C)  Find out if only some URL's slow down
 Summary
 References

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