[TriLUG] Need perfomance tuning tips for tomcat 4.06

[Krishna Dagli]

Smith, Brett wrote:
>>>Smith, Brett wrote:
>>>Can you control resources used by tomcat 4.06?
>>>I have a tomcat 4.06 server running that is soaking up some resources I
> 
> want
> 
>>>back.
>>>Do you guys have performance tuning suggestions other than upgrade?
>>>I can't upgrade because of the amount of development required to move to
>>>4.1x or 5.1
>>>
> 
> 
>>Basics, you might have already tried all following:
>>1) Switch off logging or reduce it to minumum.
> 
> The logging is a good idea.
> where is the logging controlled from? 
> 
>>2) Hostname lookups.
> 
> Can you give me a quick rundown on where 3and4 are located?
> 
>>3) Max and min processes.
>>4) Control java's heap/stack sizes (-X options)
>>5) Check if any development related options are enabled,  like 
>>reloadable or unnecessary jars being loaded.
>>6) See if you can use any other jvm.
> 
> 
>>What is machine configuration/RAM?
> 
> Dual 733 w/1024 | rh 7.1 | j2sdk1.4.2_03
> nothing I can do about machine. 
> 
> I am pretty new to Tomcat but not linux so you can be real brief with where
> to find 1,2,3.
> Are they controlled in the server.xml or a config/ file?

All of them are in server.xml.  I had problem one very specific 
problem with a Dual CPU and JDK 1.2 (or older donot remember 
properly) but at the end after days of googling found that memory 
(RAM) was bad and dual cpu is no good for older jvm's on linux. 
You can check this by switching off swap. Write a small C code 
which will eat and free memory using malloc()/free(), but this is 
last thing to check, I guess.  Run memtest if you can.

 From my old bookmarks following link should save you some time
http://homepage.mac.com/sander/iblog/C1059910030/E1027935578/

HTH. Let us know what works for you.
-Krishna.