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From "matt.accola" <matt.acc...@empowermx.com>
Subject Log4j 1.2.9, 64-bit, Websphere Performance Problems
Date Fri, 11 Aug 2006 01:40:50 GMT

We are having performance problems which we traced to overhead from our
logging.  Each log  statemement is taking around 200 ms.  The details of the
logging configuration are:

Log4j 1.2.8 with RollingLogFileAppender
http://www.nabble.com/user-files/267/test_jsps.zip test_jsps.zip 


File
Description
64-bit Linux
32-bit Windows



logging.jsp
Log 1000 iterations using only Log4j
93 ms
0.41 ms



file-IO.jsp
1000 iterations small file read using pure java file utility package
0.01 ms
0.13 ms



file-IO.jsp
1000 iterations writing to servlet logfile utilizing J2EE servlet API
1.67 ms
2.82 ms



Log4jPerformanceTest.java
Log 1000 iterations using only Log4j
0.81 ms
0.26


I have attached the source code of each test.  As you can see the
performance for a simple JSP which logs 1000 log statements using log4j is
over 200 times slower on the 64-bit Linux vs. the 32-bit Windows machine. 
Does anyone have any advice?
-- 
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