Fine tuning GC

Hi folks,
Hi folks,
I posted this question to Java Programming before, but I think it should be a JVM question.
I have a web server that has 16GB of ram. Currently, I only allocate 8GB to the Java heap. The server is doing fine now, but I am worried I need to allocate more memory to the Java when we get more users.
When a normal user sign in, it will require a 30MB data structure. The data will be saved in the session. The data will be removed from session when the user logs out or session times out. For some users, the data structure may require 1GB to build, but those users are not too many. The problem is, there may be a chance few of these large users log in and many of the normal users are still in session. It can totally bring the server down. My plan is to put 32GB of ram to the server, and allocate 3/4 which is 24GB to the Java heap.
Okay, here is my question, when the JVM needs to the major or full GC for 24GB, the pauses will be long. I wonder if there is a way to tune the GC to do the major or full GC around 8GB like before even I allocate 24GB.
Thanks in advance!

Only reason I could see to keep session info like that in memory would be a milsec app. If that is your app then get a box with a lot of memory. If isn't then redesign it.

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Answer Finded

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I am facing some problems while changing the values in Code-list while using fine tuning process in Configuration. I have created three code-lists and then being added to configuration using BAC.
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Asad

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Manusnake wrote:
pilotguy74 wrote:
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Fine tuning GC

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