I would agree with David on this one. A client request should return in
a timely manner. Hence, you would want that kind of processing done on
a separate thread.
One other suggestion I have is to set you minimum heap (ms) equal to
your maximum heap. That way the server doesn't have to burn CPU cycles
trying to allocate memory.
You should also consider refactoring the way you're building the file.
I would bet that your memory problems are not caused by the size of the
file, but how you're creating it. For example, if you build the entire
file as a string in memory, that would eat a significantly larger amount
of memory than writing the file to the stream in chunks. Remember that
if you're running in a multi-user environment, there will be other
clients trying to use the system. You don't want to "nail the server to
the wall" for just one process.
As for your timeout problem, you can adjust the timeout length in the
JTA settings on the weblogic console.
Kevin E. Gaasch
Panhandle Plains Student Loan Center
Software Craftsman
Senior Programmer/Analyst
Sun Certified Java Programmer
Work: 806.324.4108
Cell: 806.674.1523
>>> david.karr@(protected) >>>
Are those the exact arguments you're sending on the command line? I'm
not sure what that would do, as you're specifying "-mx" twice. You
probably meant the first one to be "-ms". In any case, I imagine that
would still set "-mx" to 1024, but that's just a guess.
Are you monitoring how long it really takes to write the data to the
file? Is it really taking on the order of >240 seconds? If so, then
you should probably do that on a separate thread, asynchronously from
the original client request.
-----Original Message-----
From: A mailing list for Java(tm) 2 Platform, Enterprise
Edition
[mailto:J2EE-INTEREST@(protected)
Sent: Thursday, January 06, 2005 1:41 AM
To: J2EE-INTEREST@(protected)
Subject: OutOfMemory on weblogic server
Hi,
We are running weblogic 7.0 on linux redhat 7.3.
I am getting outOfmemory on the server side whenever we are
trying to export large amout of data to a csv file.
I tried increasing the heap size by specifying java options
"-server -mx512m -mx1024m"
but now i am not getting the OutOfmemory but a error on the
client side saying
"No response for "240" seconds"
where 240 is the transaction-timeout .
after this i cannot do anything with the server,
i have to restart the server :(
Can any one please help me solve this problem.
Regards
Sanjeev
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