Memory leakage with swing

We have developed a applet using swing componenets . We have used dispose, callled gc() and made references null and removed the listeners to enable the components for garbage collection. We have used windows NT. When we see the task manager the memory usage only increases as we work on the applet. When we minimize the browser and maximise it again then the extra memory is releaased but as long as we work on the browser though we have done lot of things the memory usage in task manager only increases. Can you help us out. What are the reason for memory leakage . Why the memory is not released by the jvm to OS. Is it designed that way. What are the precautions to take. We use JDK1.2 for developing and run the applet with the jre1.2 and jre1.3 plug in installed on the windows nt system
Thanks in advance

Hi there
This topic has been discussed several times before
Basicly this is it
The GC knows it is sluggish (well those who built it any whay)
therefor it will not clean up until it is necessary
therefor your memory for the JAVA app will grow in
memory size (as long as there is more room why clean?)
When you start/close another program the OS will
demand more memory and the GC will run cleanup. How effective this cleanup realy is
depends on the situation.
To make things easier for the GC you should as you state
clean all referenses etc
If you whant to start another memory consuming program
you should start it before the Java App. then the memory that is available for the Java VM is limmited.
There are also whays to set the maximum / minimum memory for the Java VM
Markus

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I have noticed
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I tried
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package Vidz;
import java.io.*;
import java.util.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class DBConnection {
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     public PreparedStatement preparedStmt;
     public ResultSet rset;
     public SQLWarning thisWarning;
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public DBConnection() {
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* Return java.sql.ResultSet
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try {
status=command;
stmt = conn.createStatement ();
status+="*";
rset = stmt.executeQuery(command);
status+="executeQuery OK: "+command;
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try {
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if( ! conn.isClosed() )
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conn.close();
catch (java.sql.SQLException e) {}
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Hi there, I've been experiencing ongoing memory leakage using my Conky + Lua scripts. It tends to keep accumulating memory until I kill the process and restart it. Highest I've seen it go is 10% of my 4gb of RAM, so it does get to be substantial if unchecked.
I did google it, and it mentioned something about cairo_destroy(cr), so I inserted it at the end of functions randomly where it made sense (to my limited scripting skills) and where it didn't (just in case), but it didn't seem to make any difference.
Here is the lua script - it creates rings as % bars, I believe it was taken from somewhere on the arch forums months ago where it was also modified.
Ring Meters by londonali1010 (2009)
This script draws percentage meters as rings. It is fully customisable; all options are described in the script.
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lua_load ~/scripts/rings-v1.2.1.lua
lua_draw_hook_pre ring_stats
-- Background settings
corner_r=20
main_bg_colour=0x060606
main_bg_alpha=0.4
-- Ring color settings
ring_background_color = 0x000000
ring_background_alpha = 0.6
ring_foreground_color = 0x909090
ring_foreground_alpha = 1
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settings_table = {
name='cpu',
arg='cpu2',
max=100,
bg_colour=ring_background_color,
bg_alpha=ring_background_alpha,
fg_colour=ring_foreground_color,
fg_alpha=ring_foreground_alpha,
x=50, y=55,
radius=31,
thickness=3,
start_angle=-180,
end_angle=0
name='cpu',
arg='cpu1',
max=100,
bg_colour=ring_background_color,
bg_alpha=ring_background_alpha,
fg_colour=ring_foreground_color,
fg_alpha=ring_foreground_alpha,
x=50, y=55,
radius=35,
thickness=3,
start_angle=-180,
end_angle=0
name='memperc',
arg='',
max=100,
bg_colour=ring_background_color,
bg_alpha=ring_background_alpha,
fg_colour=ring_foreground_color,
fg_alpha=ring_foreground_alpha,
x=205, y=55,
radius=32,
thickness=10,
start_angle=-180,
end_angle=-0
require 'cairo'
local function rgb_to_r_g_b(colour,alpha)
return ((colour / 0x10000) % 0x100) / 255., ((colour / 0x100) % 0x100) / 255., (colour % 0x100) / 255., alpha
end
local function draw_ring(cr,t,pt)
local w,h=conky_window.width,conky_window.height
local xc,yc,ring_r,ring_w,sa,ea=pt['x'],pt['y'],pt['radius'],pt['thickness'],pt['start_angle'],pt['end_angle']
local bgc, bga, fgc, fga=pt['bg_colour'], pt['bg_alpha'], pt['fg_colour'], pt['fg_alpha']
local angle_0=sa*(2*math.pi/360)-math.pi/2
local angle_f=ea*(2*math.pi/360)-math.pi/2
local t_arc=t*(angle_f-angle_0)
-- Draw background ring
cairo_arc(cr,xc,yc,ring_r,angle_0,angle_f)
cairo_set_source_rgba(cr,rgb_to_r_g_b(bgc,bga))
cairo_set_line_width(cr,ring_w)
cairo_stroke(cr)
-- Draw indicator ring
cairo_arc(cr,xc,yc,ring_r,angle_0,angle_0+t_arc)
cairo_set_source_rgba(cr,rgb_to_r_g_b(fgc,fga))
cairo_stroke(cr)
end
local function conky_ring_stats()
local function setup_rings(cr,pt)
local str=''
local value=0
str=string.format('${%s %s}',pt['name'],pt['arg'])
str=conky_parse(str)
value=tonumber(str)
if value == nil then value = 0 end
pct=value/pt['max']
draw_ring(cr,pct,pt)
end
if conky_window==nil then return end
local cs=cairo_xlib_surface_create(conky_window.display,conky_window.drawable,conky_window.visual, conky_window.width,conky_window.height)
local cr=cairo_create(cs)
local updates=conky_parse('${updates}')
update_num=tonumber(updates)
if update_num>1 then
for i in pairs(settings_table) do
setup_rings(cr,settings_table[i])
end
end
cairo_destroy(cr)
end
--[[ This is a script made for draw a transaprent background for conky ]]
local function conky_draw_bg()
if conky_window==nil then return end
local w=conky_window.width
local h=conky_window.height
local cs=cairo_xlib_surface_create(conky_window.display, conky_window.drawable, conky_window.visual, w, h)
local cr=cairo_create(cs)
-- local thick=2
cairo_move_to(cr,corner_r,0)
cairo_line_to(cr,w-corner_r,0)
cairo_curve_to(cr,w,0,w,0,w,corner_r)
cairo_line_to(cr,w,h-corner_r)
cairo_curve_to(cr,w,h,w,h,w-corner_r,h)
cairo_line_to(cr,corner_r,h)
cairo_curve_to(cr,0,h,0,h,0,h-corner_r)
cairo_line_to(cr,0,corner_r)
cairo_curve_to(cr,0,0,0,0,corner_r,0)
cairo_close_path(cr)
cairo_set_source_rgba(cr,rgb_to_r_g_b(main_bg_colour,main_bg_alpha))
--cairo_set_line_width(cr,thick)
--cairo_stroke(cr)
cairo_fill(cr)
cairo_destroy(cr)
end
function conky_main()
conky_draw_bg()
conky_ring_stats()
cairo_destroy(cr)
end
And this is called into conky via:
background no
override_utf8_locale no
use_xft yes
xftfont Monospace:size=8
## orig font cure
text_buffer_size 2048
update_interval 1.0
total_run_times 0
own_window yes
own_window_transparent yes
own_window_type desktop
own_window_colour 191919
own_window_hints undecorated,below,sticky,skip_taskbar,skip_pager
double_buffer yes
minimum_size 600 90
maximum_width 320
draw_shades no
draw_outline no
draw_borders no
draw_graph_borders no
default_color 909090
default_shade_color fed053
default_outline_color 7f8f9f
alignment br
gap_x 30
gap_y 50
no_buffers yes
uppercase no
cpu_avg_samples 2
override_utf8_locale no
color1 fff
border_inner_margin 5
border_outer_margin 5
own_window_argb_visual no
own_window_argb_value 200
lua_load ~/.conky/rings.lua
lua_draw_hook_pre main
Left out the conky TEXT section unless anybody desperately needs to see that too.
If anybody can point me in the right direction with this silly thing, that would be appreciated. Thanks!
Last edited by ugugii (2011-11-16 17:42:00)

No I meant that the destroy functions should not be in conky_main at all. Why? Because you are using cr as an argument when you have no local cr defined. You are passing the undefined value (nil) to these destroy functions and they do nothing.
Like I said, I don't use conky or cairo but it is generally a good idea to destroy a resource you create. If you don't you will get memory leaks because "creating" is usually vague language that comes down to allocating memory and "destroy" deallocates memory.
This line from your own post creates a surface and stores it in the cs variable:
local cs=cairo_xlib_surface_create(conky_window.display,conky_window.drawable,conky_window.visual, conky_window.width,conky_window.height)
Yet you forget to deallocate the surface stored in cs. So add a line like this after each cairo_destroy(cr):
cairo_surface_destroy(cs)
I hope that helps.

Can I build a GUI application with SWING only without [import java.awt.*;]

I have seen several threads (in forums), books and tutorials about SWING and I see that they all mix SWING with AWT (I mean they import both Swing and AWT in their code).
The conclusion that comes out is:
It is good to learn about SWING and forget AWT as it won't be supported later. I have decided to do so, and I never include <<import java.awt.*;>> in my code.
But I see that you cannot do much without <<import java.awt.*;>>. For example this line which changes the background color:
<<frame.getContentPane().setBackground(Color.red)>>
works only with <<import java.awt.*;>>. I have seen that codes in this and other forums import awt to change the background. Why is that?
After all, I wonder, what can I do;
My question is, can I change the background (and of course do all other things listener, buttons etc) without using <<import java.awt.*;>>.
I would like to avoid using <<import java.awt.*;>> and using awt since my program will not work later.
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I know, I must have misunderstood something. I would appreceate it very much, if anyone could give me even a short answer.
Thank you in advance,
JMelsi

Since swing is a layer on top of awt, AWT will exist for as long as swing does.
If sun does ever remove AWT they will have to replace it something else swing can layer on to and you will probably only have to replace your import statements.
The main difference is the way there drawn to the screen.
You can do custom drawing on swing components but you can't on AWT.
If your using a desktop PC system it's probably best to use swing just in case you wish to do some custom drawing.
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Memory problem with jdk/jre 1.1.8

My name is BERGMANN Yannick.
I'm working for IRM in Li?ge and we developped an application (user interface for an industrial measurement system) in Java (JDK/JRE version : 1.1.8).
We have a big memory problem with this application :
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- here is a memory map of our Windows NT PC :
     "jre.exe"     "commit total"     "commit limit"     "commit peak"     "physical total"     "physical available"     "physical file cache"
Monday     92264     109256     194944     109424     130484     19492     6216
Thuesday     106196     123072     194944     123348     130484     6072     5840
Wednesday     110836     132288     194944     132416     130484     4408     5140
Thursday     108200     144980     194944     145140     130484     4888     5148
Friday     109440     158319     194944     161334     130484     4911     4992
Monday     111600     209060     228548     209148     130484     5184     3484
Have you any idea of what is happening with "jrew" in memory ?
We have had this problem for six month and we are totaly out of idea.
If you can give us any idea, we'll appreciate a lot.
Thanks in advance,
BERGMANN Yannick
IRM SA - Software Engineer
Tel. (32)4/239.90.10
Tel. (32)4/239.90.74 (direct)
Fax (32)4/263.40.97
E-mail [email protected]

We had a memory problem with a swing applet in our company. The major reason for this was that we added new components in a JTree and removed them later again, and the components we removed were never garbage collected. This was because with these components we added different listeners, and we didn't remove the listeners after we didn't need the components anymore. After we corrected this, the components where garbage collected.
Perhaps it's a similar problem you have, or I have no idea. Check that you remove actionlisteners, mouselisteners etc from components you want to be garbage collected.
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Are there any good tool for checking security risks, Code review, memory leakages for SharePoint projects?

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I found one such tool "Fortify" in the below link. Are there any such kind of tools available which supports SharePoint?
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Amalaraja Fernando,
SharePoint Architect
Please Mark As Answer if my post solves your problem or Vote As Helpful if a post has been helpful for you. This post is provided "AS IS" with no warrenties and confers no rights.

Hi Amalaraja Fernando,
I'm not sure that there is one more tool that combines all these features. But you may take a look at these solutions:
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SharePoint enterprise manager
What is SPCop SharePoint Code Analysis?
Dmitry
Lightning Tools Check
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Lightning Tools Blog | Мой Блог

Does making objects equal null help the gc handle memory leakage problems

hi all,
does making objects equal null help the gc handle memory leakage problems ?
does that help out the gc to collect unwanted objects ??
and how can I free memory avoid memory leakage problems on devices ??
best regards,
Message was edited by:
happy_life

Comments inlined:
does making objects equal null help the gc handle
memory leakage problems ?To an extent yes. During the mark phase it will be easier for the GC to identify the nullified objects on the heap while doing reference analysis.
does that help out the gc to collect unwanted objects
??Same answer as earlier, Eventhough you nullify the object you cannot eliminate the reference analysis phase of GC which definitelely would take some time.
and how can I free memory avoid memory leakage
problems on devices ??There is nothing like soft/weak reference stuffs that you get in J2SE as far as J2ME is concerned with. Also, user is not allowed to control GC behavior. Even if you use System.gc() call you are never sure when it would trigger the GC thread. Kindly as far as possible do not create new object instances or try to reuse the instantiated objects.
~Mohan

Memory Leak with JPopupMenu

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Peter
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import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
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import java.awt.event.WindowListener;
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import java.util.Timer;
import java.util.TimerTask;
import java.util.Vector;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.AbstractTableModel;
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     private static final DecimalFormat     df               = new DecimalFormat("#,##0.#");
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          long f = Runtime.getRuntime().freeMemory();
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                    createAndShowGUI();
     protected class PopupMenu extends JPopupMenu {
          public PopupMenu() {
               JRadioButtonMenuItem item1 = new JRadioButtonMenuItem(new AbstractAction("Insert Item") {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                         System.out.println(e.getActionCommand());
               item1.setActionCommand("Insert");
               add(item1);
               JRadioButtonMenuItem item2 = new JRadioButtonMenuItem(new AbstractAction("Delete Item") {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                         System.out.println(e.getActionCommand());
               item2.setActionCommand("Delete");
               add(item2);
     public class FrmReferrals extends JFrame {
          public FrmReferrals() {
               super();
               init();
          protected void init() {
               jbInit();
          protected void closeIt() {
               uninit();
          // variables here
          protected Dimension          dimPreferred     = new Dimension(1270, 995);
          protected JTabbedPane     tabbedPane          = new JTabbedPane();
          protected JTable          tblReferrals     = null;
          protected PopupMenu          popMenu           = new PopupMenu();
          protected void jbInit() {
               setPreferredSize(dimPreferred);
               setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
               setTitle("Referrals");
               JPanel pnl = new JPanel();
               pnl.setOpaque(false);
               pnl.setLayout(new BorderLayout());
               pnl.add(tabbedPane, BorderLayout.CENTER);
               // put it all in the frame
               add(pnl);
               pack();
               setLocationRelativeTo(null);
               // init the table and model
               ReferralsTableModel ctm = new ReferralsTableModel(buildDummyVector());
               tblReferrals = new JTable(ctm);
               tblReferrals.setComponentPopupMenu(popMenu);
               tblReferrals.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
               tabbedPane.add(new JScrollPane(tblReferrals, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED));
               addWindowListener(new WindowListener() {
                    @Override
                    public void windowActivated(WindowEvent e) {}
                    @Override
                    public void windowClosed(WindowEvent e) {}
                    @Override
                    public void windowClosing(WindowEvent e) {
                         closeIt();
                    @Override
                    public void windowDeactivated(WindowEvent e) {}
                    @Override
                    public void windowDeiconified(WindowEvent e) {}
                    @Override
                    public void windowIconified(WindowEvent e) {}
                    @Override
                    public void windowOpened(WindowEvent e) {}
          protected Vector<DBO_Referrals> buildDummyVector() {
               Vector<DBO_Referrals> vr = new Vector<DBO_Referrals>();
               for (int x = 0; x < 5000; x++) {
                    DBO_Referrals r = new DBO_Referrals(x+(5000*ctr));
                    vr.add(r);
               return vr;
          protected void uninit() {
               tblReferrals.setComponentPopupMenu(null);
               for (Component c : popMenu.getComponents()) {
                    PropertyChangeListener[] pl = c.getPropertyChangeListeners();
                    for (PropertyChangeListener l : pl)
                         c.removePropertyChangeListener(l);
                    if (c instanceof JMenuItem) {
                         ActionListener [] al = ((JMenuItem)c).getActionListeners();
                         for (ActionListener l : al) {
                              ((JMenuItem)c).removeActionListener(l);
               popMenu = null;
          protected class DBO_Referrals {
               protected long          id;
               protected String     Employee;
               protected String     Rep;
               protected String     Asst;
               protected String     Client;
               protected String     Dates;
               protected String     Status;
               protected String     Home;
               public DBO_Referrals(long id) {
                    this.id = id;
                    Employee = "Employee" + id;
                    Rep = "Rep" + id;
                    Asst = "Asst" + id;
                    Client = "Client" + id;
                    Dates = "Dates" + id;
                    Status = "Status" + id;
                    Home = "Home" + id;
               public long getId() {
                    return id;
               public String getEmployee() {
                    return Employee;
               public String getRep() {
                    return Rep;
               public String getAsst() {
                    return Asst;
               public String getClient() {
                    return Client;
               public String getDates() {
                    return Dates;
               public String getStatus() {
                    return Status;
               public String getHome() {
                    return Home;
          public class ReferralsTableModel extends AbstractTableModel {
               protected Vector<DBO_Referrals>          data          = new Vector<DBO_Referrals>();
               protected String[]                         sColumns     = {"id", "Employee", "Rep", "Assistant", "Client", "Date", "Status", "Home", "R"};
               public ReferralsTableModel() {
                    super();
               public ReferralsTableModel(Vector<DBO_Referrals> data) {
                    this();
                    this.data = data;
               @SuppressWarnings("unchecked")
               @Override
               public Class getColumnClass(int col) {
                    switch (col) {
                         case 0 :
                              return Long.class;
                         default :
                              return String.class;
               @Override
               public int getColumnCount() {
                    return sColumns.length;
               @Override
               public int getRowCount() {
                    return data.size();
               @Override
               public Object getValueAt(int row, int col) {
                    if (row > data.size())
                         return null;
                    DBO_Referrals a = data.get(row);
                    switch (col) {
                         case 0 :
                              return a.getId();
                         case 1 :
                              return a.getEmployee();
                         case 2 :
                              return a.getRep();
                         case 3 :
                              return a.getAsst();
                         case 4 :
                              return a.getClient();
                         case 5 :
                              return a.getDates();
                         case 6 :
                              return a.getStatus();
                         case 7 :
                              return a.getHome();
                         case 8 :
                              return "+";
                         default :
                              return null;

BTW instead of continually printing out the memory use a profiler (jvisualvm in the jdk/bin directory -> heapdump -> search on your class -> view in instances -> find nearest GC root).
Looks like BasicPopupMenuUI doesn't remove a reference to the JRootPane immediately. As far as I can see it will be removed when another menu shows.
As a hackish workaround you can try this in you FrmReferrals#uninit():
            for(ChangeListener listener : MenuSelectionManager.defaultManager().getChangeListeners()) {
                if (listener.getClass().getName().contains("MenuKeyboardHelper")) {
                    try {
                        Field field = listener.getClass().getDeclaredField("menuInputMap");
                        field.setAccessible(true);
                        field.set(listener, null);
                    } catch (Exception e) {
                        // ignored
                    break;
            }Funnily enough though it isn't there when I reduce your code to a SSCCE:
import java.awt.*;
import javax.swing.*;
public class TestBasicPopupMenuUILeak extends JFrame {
    public TestBasicPopupMenuUILeak() {
        super("Not collected right away");
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                JFrame frame = new JFrame("Test");
                frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                frame.getContentPane().add(
                        new JButton(new AbstractAction("Show frame") {
                            @Override
                            public void actionPerformed(ActionEvent e) {
                                EventQueue.invokeLater(new Runnable() {
                                    public void run() {
                                        JLabel label = new JLabel(
"Right click to show popup, then close this frame."
+ "The frame with not be GCed until another (popup) menu is shown.");
                                        JPopupMenu popup = new JPopupMenu(
                                                "Popup");
                                        popup.add("Item");
                                        label.setComponentPopupMenu(popup);
                                        // named differently so you can find it
                                        // easily in your favorite profiler
                                        JFrame frame = new TestBasicPopupMenuUILeak();
                                        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                                        frame.getContentPane().add(label);
                                        frame.pack();
                                        frame.setLocationRelativeTo(null);
                                        frame.setVisible(true);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
}

Vision OCR memory leakage

Hi guys!
I have a "problem" with simple OCR vi's made with Vision Assistant in NI Vision 2011.
When I create a simple script, that only uses the OCR, and then create a .vi from it, the vi leaves the OCR session open. This results to huge leakage of RAM memory.
You cannot even get the OCR session out from the .vi automatically when creationg the vi, so that it could be disposed outside of the .vi! So only solution I could figure out was to actually modify the .vi and build it inside there. Also the .abc file for the OCR have to be built, because it's not necessary in the same drive or base path, and Vision Assistant uses the whole path e.g. "D:\Labview Projects\OCR\... ...fonts.abc".
It wouldn't be a problem unless I and especially others wouldn't be creating those OCR -vi's all the time. Now every vi have to be manually changed to dispose the session AND to take the .abc -file path in reference to the executable path.
If somebody knows any solutions for this, please don't hesitate to tell me Thanks!

Hi,
System.gc() only suggests the objects are removed but there is no obligation for the JVM to do so.
The implementation of different JVM's will approach this event in different ways. For example an embedded JVM might be designed to nearly alwaya remove objects that have no reference left.
Anyway this is not strictly speaking memory leakage because if the JVM decides to it CAN remove the object.
Real memory leakage is where a series of object references are created and not destroyed and so they persist in time because they cannot be GC'ed.
A typical example is to create an object, stick it in an array of objects for some processing and then set the original object reference to null, thinking the object can now be GC'ed. But it can't unless the object reference in the array(which is a copy of the original object reference) is also set to null.
Hope that helps,

Find memory leakage when passing Object Reference from Teststand to vi

I am using Teststand to call labview vi, and pass ThisContext of sequence to vi as object reference, but if I just loop this step and I can find the memory using keep increasing, how can I avoid the memory leakage inside the vi.
see my vi, it is to post message to UI.
Solved!
Go to Solution.

You should be using a close reference node to close the references you get as a result of an invoke. In the code below you should be closing the references you get from the following:
AsPropertyObject
Thread
Close those two references once you are done with them.
Also make sure you turned off result collection in your sequence or you will be using up memory continually for the step results.
Hope this helps,
-Doug

Memory leakage issue in Solaris

Hi Team,
Hope you doing good!!
I am facing a memory leakage issue in the Solaris server configured.
details:
1. Frequent Increase in Memory Utilization
2. Major Faults in System Events 189084 & Increasing.
Server cofg.:
Solaris 9 version 5.9,Sun Java Web Server 6.1,JDK 1.5,Oracle 10g.
I really appreciate if you give conclusion for the above behavior of server ASAP.
Thanks,
Vivek
+919990550305

Please test it with release version as there may be a lot of things which are fixed after beta.
Also please note down the statement cache size your application was using earlier. Starting from 2.111.7.10/2.111.7.20, the statement cache size is automatically tuned by default. This feature is called self tuning. You may disable self tuning and specify your own statement cache size as usual. To know more about self tuning, please consult ODP.NET Developer's Guide.
I would suggest that you first upgrade to the release version 2.111.7.20. If that does not solve the problem, you may either
- specify MaxStatementCacheSize
or
- disable self tuning and provide your own statement cache size

Memory leakage with swing

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