Java performance problem

[Jos? Cardoso]

Hi,

I have developed a java application that interacts with a database.
Now i've the folowing problem:

- I have a list retrieved from the database(about 200 records);
- for each, i do a Jlabel constructed from an html String;
- for each JLabel i construct a JPanel e add it to the main panel.

this works fine, but when there's an inactivity in the application
(about 30 minutes), the main panel disapear and the application
freeze. i don't know the reason for that (perhaps a lack of memomy
???).The application runs in a PIII 600mhz with 256 mb of ram.

Somebody can help me???

Thanks.

[Andrew Thompson]

On 1 Sep 2004 03:20:55 -0700, Jos? Cardoso wrote:

My program is something like that..

(that doesn't compile.. SSc*C*e)

Did you read that link to the SSCCE?

And, ..now that you seem to have dropped
one of the cross-posted groups, can I
also ask you to drop the invalid group
'comp.lang.java ' and follow this up on *only*
comp.lang.java. help Jos?(?)

And please trim your problem down to a
self contained compileable example, there
are good reasons for preparing one, see..
<http://www.physci.org/codes/sscce.jsp>

HTH

--
Andrew Thompson
http://www.PhySci.org/ Open-source software suite
http://www.PhySci.org/codes/ Web & IT Help
http://www.1point1C.org/ Science & Technology

[Raymond DeCampo]

Jos? Cardoso wrote:

I think my problem is in java allocated memory. It uses memory for the
objects created and don't release it. I was working in my application
until he reaches the 80mb of memory, and if i minimize my GUI, the
memory for my process cames to 11mb. Otherwise the memory keeps
climbing and hangs the application.

It sounds like you are using Windows Task manager to determine how much
memory you are using. If that is the case, you cannot simply look at
the default memory column that task manager presents. That only
displays the amount of physical memory used by the process (that is why
you see a great reduction when you minimize an application; Windows
swaps out its memory). Use the options of task manager to display the
virtual memory as well.

As an alternative, you can use System.freeMemo ry(), etc. to get the
information direct from the JVM.

HTH,
Ray

--
XML is the programmer's duct tape.