Just to sanity check....
if you log a message that performs string concatenation, you do it like this, right?
(assumes an org.apache.log4j.Logger instance log)
if (log.isDebugEnabled())
{
log.debug("Test Log Message: " + foo + " = " + bar + ".");
}
Sean
Sean Reilly
Programmer, Point2 Technologies, Inc.
(306) 955-1855
[EMAIL PROTECTED]
-----Original Message-----
From: James Gallogly [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, December 18, 2002 2:55 PM
To: Log4J Developers List
Subject: RE: Large Memory usage while using log4j
Thanks!! That is a good thread, what concerns me the most however is that
nothing is being logged.
Our logging was set to error (we do no error level logging). This means
that nothing is logged in either case.... does this mean that the Conversion
Pattern is applied before the decision to log or not occurs? In other words
why is log4j using up so much memory to do what should be nothing?
Thanks,
Jim
-----Original Message-----
From: Ceki Gulcu [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, December 18, 2002 3:42 PM
To: Log4J Developers List
Subject: Re: Large Memory usage while using log4j
The following thread might be relevant:
http://marc.theaimsgroup.com/?l=log4j-dev&m=103366188809758&w=2
At 15:35 18.12.2002 -0500, you wrote:
> On my project we have been heavily utilizing log4j as our logging
> solution.
>Recently we ran our code under very heavy load so as part of our
>optimization we wrote code to extract the log4j logging calls from our
>source. We did this in hopes of reducing some of the overhead of
>concatenation strings together thus squeezing out some performance gain.
>
> Much to our surprise the greatest impact was in memory usage, our
> memory
>usage went from 1 gig to 100 meg. This order of magnitude decrease in
>resource usage caught our attention to say the least. How might we be miss
>using the log4j tool to cause such large memory consumption?
>
> We are performing small scale experiments trying to duplicate the
> essence
>of the problem but have had little success so far. Any help or direction
>will be much appreciated.
>
>Thanks,
>Jim
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Ceki
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