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From David Delbecq <delbd+jaka...@oma.be>
Subject Re: Need some pointers on how to troubleshoot performance problemsof an application running on tomcat and java
Date Thu, 01 Mar 2007 11:38:58 GMT
En l'instant précis du 01/03/07 09:03, Nurul Zaman bin Mohamed Akbar
s'exprimait en ces termes:
> Thanks for the swift response. You did mention of a lambda tool. Can you
> direct me to a place where I can get more information on it? 
>
> I too have the same fears that increasing the memory will just delay the
> inevitable memory problems. Is there any other suggestions that you might
> have on this (For e.g. is there any tool that can pinpoint where the memory
> problem is in the application without having the sourcec code).
>   
finding and solving memory related problem is all described in FAQ i
pointed you. Lambda probe is more a replacement to tomcat manager that
can show you some informations about tomcat and webapps activity
(sessions management, datasources, a bit of memory control, etc) . Just
google for it.
> Thanks
>
> -----Original Message-----
> From: David Delbecq [mailto:delbd+jakarta@oma.be] 
> Sent: 01 March 2007 15:36
> To: Tomcat Users List
> Subject: Re: Need some pointers on how to troubleshoot performance
> problemsof an application running on tomcat and java
>
> En l'instant précis du 01/03/07 08:15, Nurul Zaman Mohamed Akhbar
> s'exprimait en ces termes:
>   
>> Hi,
>>
>> I am new to Tomcat. I have an enterprise application (which was 
>> developed by an external vendor and for which we have no source code) 
>> that is running on the followng:
>>
>> 1. Apache Tomcat 4.1.31
>> 2. J2SDK1.4.2_11
>> 3. Windows 2003 OS SP1.
>>
>> The hardware is as follows:
>> HP 2-CPU machine
>> 2 GB Memory
>>
>> The database used is SQL-Server 2000 SP4. 
>>
>> The setup is configured so that Tomcat uses maximum 750 MB of RAM. The 
>> problem is that the memory used by Tomcat continues to increase until 
>> it has no memory to find and then it crashes. The only way to recover 
>> is to re-start the tomcat server.
>>   
>>     
> Memory leak
>   
>> I need help in finding out why this happens ? Are there any known 
>> issues in tomcat 4.1.31 ? Is the Garbage collector in J2SDK1.4.2_11 buggy?
>>   
>>     
> It's most probably inside the vendor's application. One simple but ugly way
> to delay this problem is to increase memory available to java. One other
> ugly solution is to restart tomcat every night.
> read this for details on memory problems and solutions
> http://tomcat.apache.org/faq/memory.html
>
> to monitor tomcat in general, lambda probe can be useful
>   
>> If I were to monitor the performance of the applications, what kind of 
>> tools are available? Are there any tools to search for memory leaks in 
>> the application ? I hope someone can guide me to the correct answers 
>> (or atleast to the correct websites or tools).
>>
>> Thanks in advance
>>
>>
>>
>> Nurul Zaman Bin Mohamed Akbar
>> Application Analyst
>> EXT: 8291
>>
>>
>> Disclaimer Note. 
>>
>>  
>>
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>   
>>  
>>
>> Thank you for your co-operation.
>>
>>  
>>
>>
>>
>>   
>>     
>
>
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