Freeing objects, memory leak ???
Hey...
I was wondering if there is something that is oposite to the new operator that free's object. I don't know if it does it automatically but let's say i want to free a buffer in the middle of a routine, what is the call that does that ?? I guess in C++ it's like something called delete
Thanxs
Arbitrarily setting references to null and calling System.gc will do nothing but clutter your program with useless junk and make it slower, possibly far slower. Just let the garbage collector work do its work without your help.
What is far more useful to prevent memory leaks is to call the close or dispose or remove method on objects that you no longer want to use. This will cause the object to release resources so they can be re-used.
Similar Messages
-
Memory leak problem while passing Object to stored procedure from C++ code
Hi,
I am facing memory leak problem while passing object to oracle stored procedure from C++ code.Here I am writing brief description of the code :
1) created objects in oracle with the help of "create or replace type as objects"
2) generated C++ classes corresponding to oracle objects with the help of OTT utility.
3) Instantiating classes in C++ code and assigning values.
4) calling oracle stored procedure and setting object in statement with the help of setObject function.
5) deleted objects.
this is all I am doing ,and getting memory leak , if you need the sample code then please write your e-mail id , so that I can attach files in reply.
TIA
Jagendrajust to correct my previous reply , adding delete statement
Hi,
I am using oracle 10.2.0.1 and compiling the code with Sun Studio 11, following is the brief dicription of my code :
1) create oracle object :
create or replace type TEST_OBJECT as object
( field1 number(10),
field2 number(10),
field3 number(10) )
2) create table :
create table TEST_TABLE (
f1 number(10),f2 number (10),f3 number (10))
3) create procedure :
CREATE OR REPLACE PROCEDURE testProc
data IN test_object)
IS
BEGIN
insert into TEST_TABLE( f1,f2,f3) values ( data.field1,data.field2,data.field3);
commit;
end;
4) generate C++ classes along with map file for database object TEST_OBJECT by using Oracle OTT Utility
5) C++ code :
// include OTT generate files here and other required header files
int main()
int x = 0;
int y = 0;
int z =0;
Environment *env = Environment::createEnvironment(Environment::DEFAULT);
Connection* const pConn =
env->createConnection"stmprf","stmprf","spwtrgt3nms");
const string sqlStmt("BEGIN testProc(:1) END;");
Statement * pStmt = pConn->createStatement(sqlStmt);
while(1)
TEST_OBJECT* pObj = new TEST_OBJECT();
pObj->field1 = x++;
pObj->field2 = y++;
pObj->field3 = z++;
pStmt->setObject(1,pObj);
pStmt->executeUpdate();
pConn->commit();
delete pObj;
} -
I have a memory leak, objective-c 2.0, and garbage collector...
the code i am using is a modification of the code/problem found in "Cocoa with Objective-C", chapter 3.
i have tried to use the objective-c 2.0 garbage collector methodology, using @property, @synthesize, etc. when i run the code as listed below i get a leaking message.
[Session started at 2008-02-01 23:33:37 -0500.]
2008-02-01 23:33:38.070 SongsFoundationTool[28876:10b] * _NSAutoreleaseNoPool(): Object 0x2040 of class NSCFString autoreleased with no pool in place - just leaking
Stack: (0x96b10178 0x96a3e0f8)
2008-02-01 23:33:38.075 SongsFoundationTool[28876:10b] Song 1: We Have Exposive
2008-02-01 23:33:38.076 SongsFoundationTool[28876:10b] * _NSAutoreleaseNoPool(): Object 0x2060 of class NSCFString autoreleased with no pool in place - just leaking
Stack: (0x96b10178 0x96a3e0f8)
2008-02-01 23:33:38.078 SongsFoundationTool[28876:10b] Song 2: Loops of Fury
The Debugger has exited with status 0.
when i include the commented out section, in the implementation file section, the description method, and use song1 and song2, in main, instead of song1.name and song2.name the program seems to run fine.
The Debugger has exited with status 0.
[Session started at 2008-02-01 23:38:24 -0500.]
2008-02-01 23:38:24.375 SongsFoundationTool[28936:10b] Song 1: We Have Exposive
2008-02-01 23:38:24.379 SongsFoundationTool[28936:10b] Song 2: Loops of Fury
The Debugger has exited with status 0.
please help me understand what's happening here.
also, why was it necessary to use
@property(copy, readwrite) NSString *name;
@property(copy, readwrite) NSString *artist;
instead of
@property(readwrite) NSString *name;
@property(readwrite) NSString *artist;
thanks everyone, the code is below.
// ....................... header file ...............
#import <Cocoa/Cocoa.h>
@interface Song : NSObject {
NSString *name;
NSString *artist;
@property(copy, readwrite) NSString *name;
@property(copy, readwrite) NSString *artist;
@end
//.................... the implementation file ..................
#import "Song.h"
@implementation Song
@synthesize name;
@synthesize artist;
-(NSString *) description
return [ self name ];
@end
//................................ main............................
#import <Foundation/Foundation.h>
#import "Song.h"
int main (int argc, const char * argv[]) {
Song *song1 = [ [ Song alloc ] init ];
song1.name= @"We Have Exposive" ;
[ song1 setArtist: @"The Future Sound Of Londown" ];
Song *song2 = [ [ Song alloc ] init ];
[ song2 setName: @"Loops of Fury" ];
[ song2 setArtist: @"The Chemical Brothers" ];
// Display Object
NSLog( @"Song 1: %@", song1.name );
NSLog( @"Song 2: %@", song2.name );
// include statements below if -description method is uncommented
// then comment out the two statements above. no memory leak if the code
// is used from the statements below and - description is not commented out and
// the two NSLog statements above are commented out.
NSLog( @"Song 1: %@", song1 );
NSLog( @"Song 2: %@", song2 );
return 0;
}Normally, your main only has a call to NSApplicationMain(). If you aren't doing a traditional MacOS X application, you will still want at least NSApplicationLoad() to get enough of the runtime to avoid those messages.
I don't know for sure about the syntax of Objective-C 2.0. That stuff is all new. What error message are you getting that indicated that (copy, readwrite) is required? Could you provide a link to the actual example source? I did a quick check and assign and readwrite are the defaults. It is possible that readwrite by itself makes no sense. But I'm just guessing. -
Memory Leak in my DnD Transferable object
Hi,
I need to remove obsolete Collection references to prevent a
memory leak. I can do this simply by calling ArrayList.clear().
However, I need to know "when" to clear the list.
I have a java.awt.datatransfer.Transferable which uses an
Arraylist. However, if I don't clear the array list, then I have
a loitering reference which cannot be garbage collected until
it is first removed from the list.
So when is the Transferable no longer needed? Is it after
exportDone() is called? What happens to the transferable when
there is an exception with the data flavors, is exportDone()
always called in that case?
Thanks,
JamesI am having the same problem using JDBC-ODBC bridge with the MS SQL server DB. Even after closing all of the objects as specified.
Sorry couldn't be of much help but check the following link
http://www.allaire.com/Handlers/index.cfm?ID=12409&Method=Full
But I do not have a work around for this may be I am not looking at the right response.
Can some one please help. -
MXML binding creating activation-object which seems to be memory leak
We are profiling our application trying to cut down some memory leaks and I have some loitering objects that are puzzling me. I have searched on the internet and have seen others with similar issues, but thought I'd post here to see if I am on the right track and if anything can be done about it. In our _bindingsSetup method that is generated from the MXML:
private function _ManageFavoritesDialogBulb_bindingsSetup():Array
var result:Array = [];
var binding:Binding;
binding = new mx.binding.Binding(this,
function():Class
return (ManageFavoritesDialogView);
function(_sourceFunctionReturnValue:Class):void
_ManageFavoritesDialogBulb_View1.className = _sourceFunctionReturnValue;
"_ManageFavoritesDialogBulb_View1.className");
result[0] = binding;
// ... more bindings
While profiling the app, we have a more than a handful of GC roots that say result and binding are activation objects that are causing a whole bunch of stuff to be held onto. Is this accurate? If so, is there anything we can do about it other than not using MXML?
IrvThanks for the quick replies. I went to your blog and watched the presentation you had on profiling (very nice), but my application is still having a memory leak I am having trouble locating. We have found many and have cleaned them up, but this scenario is proving pesky. I have a very simple scenario I am working with now. I use a PopupManager and put a component in it. I then tell the popupManager to removePopup. For some reason, my component is being held onto (and all the references it is holding onto). I am using Flex 3.5 but using FlashBuilder to profile. It tells me on my component there are 0 paths to the GC root, and I have clicked on most of the items found in loitering (this is a create and destroy scenario) and they all say 0 paths. Do you know of any known issues with PopupManager that I should be looking for? The only thing showing a path to GC root are some of the bindings and activation objects. (I am hoping it is not them as you pointed out) I assume when it says 0 paths to GC root it means there are only circular references keeping it around correct?
Thanks for any advice.
Irv -
Can't find the memory leak in Managed Object
Hey guys...I am trying to find the memory leak that Instruments says I have in this section of code setting up a managed object:
oCurrentSection = (Section*) [NSEntityDescription insertNewObjectForEntityForName:@"Section" inManagedObjectContext:[[CoreDataManager sharedData] oManagedObjectContext]];
oCurrentSection.nsSectionName = [attributeDict objectForKey:@"name"];
oCurrentSection.nsImgUrl = [attributeDict objectForKey:@"imgURL"];
oCurrentSection.nsDesc = [attributeDict objectForKey:@"desc"];
oCurrentSection.iOrder = [NSNumber numberWithInt: [[attributeDict objectForKey:@"order"] intValue]];
Can anyone help me out?Thanks everyone! That makes a lot more sense. Yes, kjon, I do come from windows. But please don't reference my troubled past. Actually, I typically use "ps aux | sort -n +3 | tail -1" rather than simply "ps aux" - I just wanted to make sure I wasn't missing something by looking at only the top memory-user. Glad to know there's no massive memory leak in my system
Procyon, what's wrong with a huge swap? Wouldn't you do it too if you were given a system with 200GB hdd more than necessary and told to make a webserver?
[root@norpass ~]# df -H
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 7.9G 1.1G 6.8G 14% /
none 1.1G 0 1.1G 0% /dev/shm
/dev/sda1 40M 9.9M 28M 27% /boot
/dev/sda4 238G 4.5G 234G 2% /home -
Memory leaks in C++(OCCI ) for OTT generated C++ mapping objects with Oracl
Our application is in C++ which interfaces with Oracle 10g database using OCCI. The mapping objects are created using OTT. The type of these mappisng objects in PersistentObject. Our development machine(Solaris 8) and database machine are different. So we have installed the "instantclient-basiclite-solaris6432-10.2.0.3-20070101.zip" to use OTT and OCCI on development machine. We are running purify in our application, Purify is reporting memory leaks on these OTT generated POObjects (type used is transient Objects), despite the fact that we are deleting these objects appropriately. .
Since OTT generated code uses the STL data structures vector list etc.
STL are not standard across platforms and hence you can ignore these warnings. -
Memory leaks with Njawin and COm Object
I'm using njawin 1.1 to use a DRM Microsoft object form java and all works
very well .... very good bridge !!
But I found a problem that seems like a "memory leak" in calling a method,
in this lines code :
myLicense = myLicenseObj.GetLicenseToDeliver();
System.out.println(myLicense);
myResponseObj.AddLicense("2.0.0.0", myLicense);
myResponseObj.setReplaceQuotesWith("\\\"");
myLicResponse = myResponseObj.GetLicenseResponse();
The only particularity in this code the length of myLicense string : 7 KB
If I run the program 1000 times the server use 100 Mb of ram and not release
them.
I try to use ASP to replicate the problem but nothing happens ... the
program works and not memory leak appears and than I think taht the probelm
may be in marshalling / unmarshalling string routine from/to the DRM object
Thanks a lot for all helpMe funciono colocando el progID de la interfaz que genero jawin en el constructor de la clase que se genero, despues utilice los metodos y fue transparente:
Interfaz que genero jawin:::
public interface CodeIMG {
public static final GUID clsID = new GUID("{23435XCVDF2-6D62-6749- 8E00-00AS45GH87JU}");
public static final String progID = new String("ActivexPDF.CodeIMG");
la clase que genero jawin:::::::
public class _CodeWER extends DispatchPtr {
public int getTypeInfoToken() {
return 0;
static public final GUID proxyIID = new GUID("{632PHK77-6F0B-11D4-8PLD-00A024A31CC6}");
static public final int iidToken;
static {
iidToken = IdentityManager.registerProxy(proxyIID, _CodeWER.class);
public int getGuidToken() {
return iidToken;
* Creates empty _CodeWER Object
public _CodeWER() throws COMException {
super();
* Creates _CodeWER() Object with progID
public _CodeWER()(String progid) throws COMException {
super(progid);
* Queries interface of _CodeWER Object
public _CodeWER()(IUnknown other) throws COMException {
super(other);
* Creates _CodeWER() Object with CLSID
public _CodeWER(GUID ClsID) throws COMException {
super(ClsID);
public boolean createImg(ObjectRef strChain, ObjectRef strFile) throws COMException {
return ((java.lang.Boolean) invokeN("createImg", new Object[]{strChain, strFile}, 2)).booleanValue();
Test de Prueba:::::::
public class TestDLL implements CodeIMG {
public static void main(String[] args) {
try {
CodeWER pdf = new CodeWER ( clsID );
boolean ok = pdf.createImg(new ObjectRef("9999999"), new ObjectRef("C:\\image.bmp") );
System.out.println("Lo generoi bien:: " + ok );
} catch (COMException e) {
e.printStackTrace();
Espero te sirva este ejemplito sencillo de jawin
Saludos!!!!!!!!!!!!
att juo -
Memory leak via object input stream (yes I'm resetting)
I am seeing that my system is piling up char[] (according to netbeans profiler tool). I am running JDK 1.5 on linux, the client and server code look like this. The strings are piling up on the client side only. the allocation tree looks like this:
char[]
java.lang.String.<init>
java.lang.StringBuffer.toString()
java.io.ObjectInputStream$BlockDataInputStream.readUTFBody(long)
java.io.ObjectInputStream.readString(boolean)
all the way to my client side code for receiving messages.
Does anyone have any suggestions for something I'm missing?
Client side code for receiving messages:
TaskMessage tm = null;
try
ServerProcessor.debugPrint( "waiting on message from server" );
try
tm = ( TaskMessage ) fromServer.readObject();
catch ( ClassNotFoundException cnfe )
System.out.println( "Class not found exception while reading from server" );
catch ( IOException e )
System.out.println( "failed to make connection with server, disconnecting" );
m_connector.getProcessor().disconnect();
// kill the thread
isFinished = true;
catch ( Exception e )
System.err.println( "Caught exception while reading message from server.\nAssuming disconnect, attempting to reconnect" );
fromServer = m_connector.reconnect();
m_connector.getProcessor().disconnect();
isFinished = true;
// if we have a message then dispatch it
if ( tm != null )
ServerProcessor.debugPrint( "got non-null message from server" );
m_connector.serverMessageReceived( tm );
}Client side code for senting messages:
public void sendServerMessage( TaskMessage tm )
try
ServerProcessor.debugPrint( "Sending message back to server" );
m_out.writeObject( tm );
m_out.flush();
m_out.reset();
ServerProcessor.debugPrint( "Sent back to server at: " + System.currentTimeMillis() );
catch ( IOException ioe )
System.out.println( "Unable to communicate with server." );
ioe.printStackTrace();
catch ( Exception e )
// catch this silently... hopefully to avoid the broken pipe error display ( we handle it... just elsewhere )
if ( tm.getType() != m_lastMessageType )
m_lastMessageType = tm.getType();
Runtime.getRuntime().gc();
System.out.println( "Remaining memory on client at the start of type " + tm.getType() + ": " + Runtime.getRuntime().freeMemory() );
}Server Side Code for sending messages:
try
out.writeObject( m );
out.flush();
out.reset();
catch ( Exception ioe )
droppedClient();
}Server side code for receiving messages:
// read the message
TaskMessage m = null;
try
// will block here trying to read the clients reply
m = ( TaskMessage ) in.readObject();
ServerProcessor.debugPrint( "Received message at: " + System.currentTimeMillis() );
ServerProcessor.debugPrint( "got client response" );
catch ( ClassNotFoundException cnfe )
System.out.println( "Unable to locate TaskMessage Class" );
cnfe.printStackTrace();
}I do have another memory leak in the system, what I am trying to determine from this post is if the way I am using read and write object may be contributing to that leak. I was hoping someone would be able to look at the communication code and let me know if I'm properly reseting the streams. Then at the very least I can rule this code out as the problem location and continue tracing the use of the read strings throughout the code.
-
By any chance long living filestream object cause unmanaged memory leak?
Hi,
I am running my application where in I have one file stream object which live for long duration, say its life time is equivalent to life time of application. So by any chance this kind of object causes unmanaged memory leak in the application. Because when
I see private bytes for my application, it is higher than the all bytes in heap counter. That mean there is a unmanaged memory leak. So does such filestream object cause such behaviour?
Thanks and Regards,
LucasWhat makes you think it's the file stream that leaks unmanaged memory? There could be other parts of your applications that do that.
FileStream doesn't usually allocate unmanaged memory. Its internal buffer is a GC heap allocated byte[] array. The only unmanaged memory allocation that I know of in FileStream is a OVERLAPPED structure used for async I/O. If you use BeginRead/Write make
sure you call EndRead/Write correctly, otherwise that structure may be leaked.
@Joel Engineer: "When a stream uses ASCII encoding under certain cases nulls are added to the data for block alignment."
FileStream doesn't have anything to do with text encoding and I've told you that before. Next time when I run into a post that makes such a claim I'll simply delete it. This display of ignorance has lasted more than enough. -
Hi,
I was just wondering how a memory leak can occur in Java. The garbage collector is supposed to free up all unused variables, so under what circumstances can it happen?This is not technically a "memory leak". I've seen
this called "loitering objects", which conjures upa
vivid picture: objects hanging around with nothingto
do...I think it's the classic java memory leak. A bug in
a program that prevents the freeing up of memory that
it no longer needs.Yes, but it's not what is traditionally termed a memory leak.
A real memory leak is memory that's claimed by the program but no longer accessible to the program for freeing up.
That can in Java (where what we call a program isn't a complete program but runs inside a virtual machine which handles memory allocation and deallocation) only happen if there's a flaw in the JVM itself which causes errors in memory deallocation (so most likely a flaw in the garbage collector).
In Java the objects you create are always out there somewhere where something can reach them so as to prevent them from being available to the garbage collector.
Different cause, same effect in that in both cases memory isn't getting freed for reuse. -
Hi
I have the following code to dequeue a message:
public static AqMsg2 deQueueMsg(Connection p_cn, String p_queueowner, String p_queuename) throws SQLException {
//Disable autocommit
p_cn.setAutoCommit(false);
//Get a reference to the queue
AqMsg2 v_AqMsg2 = null;
AQSession aqs = null;
AQQueue aqq = null;
AQMessage aqm = null;
AQDequeueOption dq_option = new AQDequeueOption();
dq_option.setDequeueMode(AQDequeueOption.DEQUEUE_REMOVE);
dq_option.setWaitTime(AQDequeueOption.WAIT_FOREVER);
AQDriverManager.registerDriver(new AQOracleDriver());
aqs = AQDriverManager.createAQSession(p_cn);
aqq = aqs.getQueue(p_queueowner, p_queuename );
//Retrieve the message from the queue
aqm = ((AQOracleQueue)aqq).dequeue(dq_option, AqMsg2.getFactory());
AQObjectPayload payload = aqm.getObjectPayload();
v_AqMsg2 = (AqMsg2) payload.getPayloadData();
//Return the payload-Object class
return v_AqMsg2;
The line
aqm = ((AQOracleQueue)aqq).dequeue(dq_option, AqMsg2.getFactory());
is somehow giving a memory leak. For each time the method is called the total memory used by the jvm is getting bigger, and the GC ain't freeing it.
I surpose that the dequeue method in AQOracleQueue is using a OracleCallableStatement and a resultset.
Is both of these closed when the methodcall is done ?
Is this a bug or is it something in my code ?
Ole
nullHi all,
I am planning to use JAVA AQ API to dequeue the messages. I would like to know where exactly the memory leak occurs.
For example, I run my java class (In the java class will contain dequeue process using JAVA AQ API) in server A to make a JDBC connection call to server B to kick off the dequeuing process. The server B has an oracle database with version: 9.0.1.5. Does the memory leak occurs in Server A where I kick off the process or in server B where the queue is actually resides.
Is there specific version of 9i that the memory leak happens?
Thanks in advance for any advice. -
ADO memory leak when getting Recordset from an Oracle stored procedure?
I am programming in C++ (VC 6) and using ADO 2.7 to
access Oracle 9i database. My connection string looks
like this:
Provider=MSDAORA.1;Persist Security Info=True;User ID=scott;Password=tiger;Data Source=blahblah
I have Oracle stored procedure that returns data in a
REF CURSOR output parameter. Since the stored procedure
takes input parameters, I prepare a Command object with
Parameters initialized and attached to it. I use the
Recordset Open method to execute the call. This approach
works because I get correct data back from the call in
the Recordset, but the problem is when I do this in a
infinite loop and watch the process in Windows Taks
Manager, I see 4k or 8k memory delta all the time and
the Peak Memory Usage of the process keeping going up.
I hope someone knows something in this scenario and points
me to the right direction.
Thanks, please see the following code for specifics.
HRESULT CallSP3Params(VARIANT vp1, VARIANT vp2, int spretcode, LPDISPATCH ppRSet, char *pCmdLine)
_RecordsetPtr pRs;
_CommandPtr pCmd;
_ParameterPtr paramVProfiler[3];
bstrt strMissing(L"");
*ppRSet = NULL;
variantt ErrConn;
ErrConn.vt = VT_ERROR;
ErrConn.scode = DISP_E_PARAMNOTFOUND;
try {
//Create instance of command object
pCmd.CreateInstance(__uuidof(Command));
pRs.CreateInstance(__uuidof(Recordset));
if ( vp1.vt == VT_BSTR ) {
paramVProfiler[0] = pCmd->CreateParameter("P1",adVarChar,adParamInput,SysStringLen(vp1.bstrVal) + 10,strMissing );
paramVProfiler[0]->Value = vp1;
else if ( vp1.vt == VT_I4 )
paramVProfiler[0] = pCmd->CreateParameter("P1",adNumeric,adParamInput,15,vp1);
else
TESTHR( PARAMETER_OPERATION_ERROR );
pCmd->Parameters->Append(paramVProfiler[0]);
if ( vp2.vt == VT_BSTR ) {
paramVProfiler[1] = pCmd->CreateParameter("P2",adVarChar,adParamInput,SysStringLen(vp2.bstrVal) + 10,strMissing );
paramVProfiler[1]->Value = vp2;
else if ( vp2.vt == VT_I4 )
paramVProfiler[1] = pCmd->CreateParameter("P2",adNumeric,adParamInput,15,vp2);
else
TESTHR( PARAMETER_OPERATION_ERROR );
pCmd->Parameters->Append(paramVProfiler[1]);
paramVProfiler[2] = pCmd->CreateParameter("RETCODE",adNumeric,adParamOutput,10);
pCmd->Parameters->Append(paramVProfiler[2]);
//Catch COM errors
catch( comerror &e) {
try {
// I manage my connection through this little C++ class of my own
CCUsage myconnection( &Connectionkeeper[0] );
//Set the active connection property of command object to open connection
pCmd->ActiveConnection = myconnection.m_conn;
//The command type is text
pCmd->CommandType = adCmdText;
//Set command text to call the stored procedure
pCmd->CommandText = pCmdLine;
//Open the Recordset to get result
pRs->Open( variantt((IDispatch *)pCmd,true), ErrConn, adOpenStatic, adLockReadOnly, adOptionUnspecified );
//Disconnect the command object
pCmd->PutRefActiveConnection( NULL );
if ( GetSPRetCode( pCmd, "RETCODE", spretcode ) != S_OK )
TESTHR(DB_OBJECT_OPERATION_ERROR);
// pRs->QueryInterface(IID_IDispatch, (void**) ppRSet);
// I return the Recordset by calling QueryInterface, but even without that, closing the Recordset right here still shows memory leak.
pRs->Close( );
pRs = NULL;
//Catch COM errors
catch (_com_error e) {
return S_OK;
}Whenever large numbers of BSTRs are allocated and freed quickly the process memory will continue to climb towards a stabalizing value. BSTRs are not freed until the system frees them. You can see this by making many calls allocating and freeing BSTRs, memory will climb, but when you stop for a while the gargage collection of the sys strings will take place. I've done much research to see that a server doing many queries very rapidly is not leaking memory, but out pacing the garbage collection, it will stabilize and when the process has some "rest time" the processes memory usage will decline.
In my research a suspected memory leak was not one. -
Hello,
I have noticed that calling webservice methods creates memory
leaks. It seams that after you delete pending call, it still stays
in the momory, so i thought its because webservice and pending call
objects are referencing each other creating cross reference and
preventing garbage collector from freeing the memory. I found 2
references to webservice in pending call and 1 to pending call in
webservice. Deleting them does not help.
Here's code i'm using:
import mx.services.*;
var pendingCall:PendingCall;
var service:WebService;
//loads wsdl from [DRIVE]:/WSDL.xml
service = new WebService("/WSDL.xml");
function onKeyDown() {
// call webservice method when space is pressed
if (Key.getCode() == Key.SPACE){
trace ("service.GetInfo();");
//instead of calling remote method load xml, that is located
in same folder.
service.stub.activePort.GetInfo.endpointURI = "GetInfo.xml";
pendingCall = service.GetInfo();
pendingCall.onResult = function (){
trace ("pendingCall.onResult");
// delete, when "1" is pressed.
if (Key.getCode() == 49){
trace ("delete all");
delete
service.stub.activePort.GetInfo.currentlyActive.originalPromise;
service.stub.activePort.GetInfo.currentlyActive.originalPromise =
null;
delete service.stub.callQueue[0];
service.stub.callQueue[0] = null;
delete
service.myCall.currentlyActive.originalPromise.myCall.wsdlOperation.wsdl.serviceProxy.ser vice;
service.myCall.currentlyActive.originalPromise.myCall.wsdlOperation.wsdl.serviceProxy.ser vice
= null;
delete
pendingCall.myCall.wsdlOperation.wsdl.serviceProxy.service;
pendingCall.myCall.wsdlOperation.wsdl.serviceProxy.service =
null;
delete pendingCall;
pendingCall = null;
Key.addListener(this);
Thanks for any help!Hi,
If you are using FL2 or FL3 then you might want to ensure that you delete the idMap property of each XML object. There is a known memory leak with the xml object.
delete myXml.idMap;
delete myXml;
Mark
www.flashmobileblog.com -
OracleBulkCopy have memory leak if BatchSize is less than record's count.
OracleBulkCopy::WriteToServer(IDataReader reader) have memory leak if BatchSize property is less than amount of record which were retrieved from IDataReader.
We know workaround for that, but when this problem will be fixed?
Code source at the bottom:
*****************File::Program.cs*****************
using System;
using System.Configuration;
using System.Data;
using System.Diagnostics;
using Oracle.DataAccess.Client;
namespace WindowsApplication
static class Program
private static DataTable _testTable = new DataTable("TestData");
private static int _batchSize = 10000;
private static int _totalRecordForTest = 100000;
private static int _bulkTimeOut = 600;
private static string _targetConnectionString;
private static string _targetTableName;
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
_testTable.ReadXmlSchema("tmp.data.schema");
_testTable.ReadXml("tmp.data");
_targetConnectionString = ConfigurationManager.AppSettings["targetConnectionString"];
_targetTableName = ConfigurationManager.AppSettings["targetTableName"];
_batchSize = int.Parse(ConfigurationManager.AppSettings["batchSize"]);
_totalRecordForTest = int.Parse(ConfigurationManager.AppSettings["totalRecordForTest"]);
_bulkTimeOut = int.Parse(ConfigurationManager.AppSettings["bulkTimeOut"]);
PerformCorrectTest();
Console.WriteLine("Do you want to perform memory leak test?(If no then click cancel key)");
if (Console.ReadKey().Key != ConsoleKey.Escape)
PerformMemoryLeakTest();
Console.ReadKey();
_testTable =null;
public static void PerformCorrectTest()
Console.WriteLine("Managed memory usage: {0}, unmanaged: {1}", GC.GetTotalMemory(false),
Process.GetCurrentProcess().WorkingSet64);
using (VirtualSourceReader wrapper = new VirtualSourceReader(new DataTableReader(_testTable), batchSize, totalRecordForTest))
wrapper.RowsCopied += RowsCopied;
using (OracleConnection targetConnection = new OracleConnection(_targetConnectionString))
targetConnection.Open();
Console.WriteLine("Bulk insert started at {0}", DateTime.Now);
OracleBulkCopy bc = null;
try
bc = new OracleBulkCopy(targetConnection)
DestinationTableName = _targetTableName,
BulkCopyTimeout = _bulkTimeOut,
BatchSize = _batchSize
do
bc.WriteToServer(wrapper);
} while (wrapper.ResetState());
finally
if (null != bc)
bc.Close();
bc.Dispose();
targetConnection.Clone();
Console.WriteLine("Bulk insert completed at {0}", DateTime.Now);
wrapper.Close();
Console.WriteLine("Managed memory usage: {0}, unmanaged: {1}", GC.GetTotalMemory(false),
Process.GetCurrentProcess().WorkingSet64);
public static void PerformMemoryLeakTest()
Console.WriteLine("Managed memory usage: {0}, unmanaged: {1}", GC.GetTotalMemory(false),
Process.GetCurrentProcess().WorkingSet64);
using (VirtualSourceReader wrapper = new VirtualSourceReader(new DataTableReader(_testTable), totalRecordForTest, totalRecordForTest))
using (OracleConnection targetConnection = new OracleConnection(_targetConnectionString))
targetConnection.Open();
Console.WriteLine("Bulk insert started at {0}", DateTime.Now);
OracleBulkCopy bc = null;
try
bc = new OracleBulkCopy(targetConnection)
DestinationTableName = _targetTableName,
BulkCopyTimeout = _bulkTimeOut,
BatchSize = _batchSize,
NotifyAfter = _batchSize,
bc.OracleRowsCopied += OracleRowsCopied;
bc.WriteToServer(wrapper);
finally
if (null != bc)
bc.Close();
bc.Dispose();
targetConnection.Clone();
Console.WriteLine("Bulk insert completed at {0}", DateTime.Now);
wrapper.Close();
Console.WriteLine("Managed memory usage: {0}, unmanaged: {1}", GC.GetTotalMemory(false),
Process.GetCurrentProcess().WorkingSet64);
private static void RowsCopied(object sender, long eventArgs)
Console.WriteLine("Row Processed {0}. Current time is {1}", eventArgs, DateTime.Now);
private static void OracleRowsCopied(object sender, OracleRowsCopiedEventArgs eventArgs)
RowsCopied(sender, eventArgs.RowsCopied);
*****************File::SourceDataReaderWrap.cs*****************
using System;
using System.Collections.Generic;
using System.Data;
using Oracle.DataAccess.Client;
namespace WindowsFormsApplication1
public delegate void OnRowProcessed(object sender, long rowCount);
public class SourceDataReaderWrap:IDataReader
protected IDataReader _originalReader;
protected readonly int _batchSize;
protected int _currentSessionRows;
protected long _rowCount;
public event OnRowProcessed RowsCopied;
public SourceDataReaderWrap(IDataReader originalReader, int batchSize)
_originalReader = originalReader;
_batchSize = batchSize;
_rowCount = 0;
#region Implementation of IDisposable
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
/// <filterpriority>2</filterpriority>
public void Dispose()
_originalReader.Dispose();
_originalReader = null;
if (RowsCopied != null)
foreach (OnRowProcessed @delegate in new List<Delegate>(RowsCopied.GetInvocationList()))
RowsCopied -= @delegate;
#endregion
#region Implementation of IDataRecord
/// <summary>
/// Gets the name for the field to find.
/// </summary>
/// <returns>
/// The name of the field or the empty string (""), if there is no value to return.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public string GetName(int i)
return _originalReader.GetName(i);
/// <summary>
/// Gets the data type information for the specified field.
/// </summary>
/// <returns>
/// The data type information for the specified field.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public string GetDataTypeName(int i)
return _originalReader.GetDataTypeName(i);
/// <summary>
/// Gets the <see cref="T:System.Type"/> information corresponding to the type of <see cref="T:System.Object"/> that would be returned from <see cref="M:System.Data.IDataRecord.GetValue(System.Int32)"/>.
/// </summary>
/// <returns>
/// The <see cref="T:System.Type"/> information corresponding to the type of <see cref="T:System.Object"/> that would be returned from <see cref="M:System.Data.IDataRecord.GetValue(System.Int32)"/>.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public Type GetFieldType(int i)
return _originalReader.GetFieldType(i);
/// <summary>
/// Return the value of the specified field.
/// </summary>
/// <returns>
/// The <see cref="T:System.Object"/> which will contain the field value upon return.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public object GetValue(int i)
return _originalReader.GetValue(i);
/// <summary>
/// Gets all the attribute fields in the collection for the current record.
/// </summary>
/// <returns>
/// The number of instances of <see cref="T:System.Object"/> in the array.
/// </returns>
/// <param name="values">An array of <see cref="T:System.Object"/> to copy the attribute fields into.
/// </param><filterpriority>2</filterpriority>
public int GetValues(object[] values)
return _originalReader.GetValues(values);
/// <summary>
/// Return the index of the named field.
/// </summary>
/// <returns>
/// The index of the named field.
/// </returns>
/// <param name="name">The name of the field to find.
/// </param><filterpriority>2</filterpriority>
public int GetOrdinal(string name)
return _originalReader.GetOrdinal(name);
/// <summary>
/// Gets the value of the specified column as a Boolean.
/// </summary>
/// <returns>
/// The value of the column.
/// </returns>
/// <param name="i">The zero-based column ordinal.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public bool GetBoolean(int i)
return _originalReader.GetBoolean(i);
/// <summary>
/// Gets the 8-bit unsigned integer value of the specified column.
/// </summary>
/// <returns>
/// The 8-bit unsigned integer value of the specified column.
/// </returns>
/// <param name="i">The zero-based column ordinal.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public byte GetByte(int i)
return _originalReader.GetByte(i);
/// <summary>
/// Reads a stream of bytes from the specified column offset into the buffer as an array, starting at the given buffer offset.
/// </summary>
/// <returns>
/// The actual number of bytes read.
/// </returns>
/// <param name="i">The zero-based column ordinal.
/// </param><param name="fieldOffset">The index within the field from which to start the read operation.
/// </param><param name="buffer">The buffer into which to read the stream of bytes.
/// </param><param name="bufferoffset">The index for <paramref name="buffer"/> to start the read operation.
/// </param><param name="length">The number of bytes to read.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public long GetBytes(int i, long fieldOffset, byte[] buffer, int bufferoffset, int length)
return _originalReader.GetBytes(i, fieldOffset, buffer, bufferoffset, length);
/// <summary>
/// Gets the character value of the specified column.
/// </summary>
/// <returns>
/// The character value of the specified column.
/// </returns>
/// <param name="i">The zero-based column ordinal.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public char GetChar(int i)
return _originalReader.GetChar(i);
/// <summary>
/// Reads a stream of characters from the specified column offset into the buffer as an array, starting at the given buffer offset.
/// </summary>
/// <returns>
/// The actual number of characters read.
/// </returns>
/// <param name="i">The zero-based column ordinal.
/// </param><param name="fieldoffset">The index within the row from which to start the read operation.
/// </param><param name="buffer">The buffer into which to read the stream of bytes.
/// </param><param name="bufferoffset">The index for <paramref name="buffer"/> to start the read operation.
/// </param><param name="length">The number of bytes to read.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public long GetChars(int i, long fieldoffset, char[] buffer, int bufferoffset, int length)
return _originalReader.GetChars(i, fieldoffset, buffer, bufferoffset, length);
/// <summary>
/// Returns the GUID value of the specified field.
/// </summary>
/// <returns>
/// The GUID value of the specified field.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public Guid GetGuid(int i)
return _originalReader.GetGuid(i);
/// <summary>
/// Gets the 16-bit signed integer value of the specified field.
/// </summary>
/// <returns>
/// The 16-bit signed integer value of the specified field.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public short GetInt16(int i)
return _originalReader.GetInt16(i);
/// <summary>
/// Gets the 32-bit signed integer value of the specified field.
/// </summary>
/// <returns>
/// The 32-bit signed integer value of the specified field.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public int GetInt32(int i)
return _originalReader.GetInt32(i);
/// <summary>
/// Gets the 64-bit signed integer value of the specified field.
/// </summary>
/// <returns>
/// The 64-bit signed integer value of the specified field.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public long GetInt64(int i)
return _originalReader.GetInt64(i);
/// <summary>
/// Gets the single-precision floating point number of the specified field.
/// </summary>
/// <returns>
/// The single-precision floating point number of the specified field.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public float GetFloat(int i)
return _originalReader.GetFloat(i);
/// <summary>
/// Gets the double-precision floating point number of the specified field.
/// </summary>
/// <returns>
/// The double-precision floating point number of the specified field.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public double GetDouble(int i)
return _originalReader.GetDouble(i);
/// <summary>
/// Gets the string value of the specified field.
/// </summary>
/// <returns>
/// The string value of the specified field.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public string GetString(int i)
return _originalReader.GetString(i);
/// <summary>
/// Gets the fixed-position numeric value of the specified field.
/// </summary>
/// <returns>
/// The fixed-position numeric value of the specified field.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public decimal GetDecimal(int i)
return _originalReader.GetDecimal(i);
/// <summary>
/// Gets the date and time data value of the specified field.
/// </summary>
/// <returns>
/// The date and time data value of the specified field.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public DateTime GetDateTime(int i)
return _originalReader.GetDateTime(i);
/// <summary>
/// Returns an <see cref="T:System.Data.IDataReader"/> for the specified column ordinal.
/// </summary>
/// <returns>
/// An <see cref="T:System.Data.IDataReader"/>.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public IDataReader GetData(int i)
return _originalReader.GetData(i);
/// <summary>
/// Return whether the specified field is set to null.
/// </summary>
/// <returns>
/// true if the specified field is set to null; otherwise, false.
/// </returns>
/// <param name="i">The index of the field to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
public bool IsDBNull(int i)
return _originalReader.IsDBNull(i);
/// <summary>
/// Gets the number of columns in the current row.
/// </summary>
/// <returns>
/// When not positioned in a valid recordset, 0; otherwise, the number of columns in the current record. The default is -1.
/// </returns>
/// <filterpriority>2</filterpriority>
public int FieldCount
get { return _originalReader.FieldCount; }
/// <summary>
/// Gets the column located at the specified index.
/// </summary>
/// <returns>
/// The column located at the specified index as an <see cref="T:System.Object"/>.
/// </returns>
/// <param name="i">The zero-based index of the column to get.
/// </param><exception cref="T:System.IndexOutOfRangeException">The index passed was outside the range of 0 through <see cref="P:System.Data.IDataRecord.FieldCount"/>.
/// </exception><filterpriority>2</filterpriority>
object IDataRecord.this[int i]
get { return _originalReader[i]; }
/// <summary>
/// Gets the column with the specified name.
/// </summary>
/// <returns>
/// The column with the specified name as an <see cref="T:System.Object"/>.
/// </returns>
/// <param name="name">The name of the column to find.
/// </param><exception cref="T:System.IndexOutOfRangeException">No column with the specified name was found.
/// </exception><filterpriority>2</filterpriority>
object IDataRecord.this[string name]
get { return _originalReader[name]; }
#endregion
#region Implementation of IDataReader
/// <summary>
/// Closes the <see cref="T:System.Data.IDataReader"/> Object.
/// </summary>
/// <filterpriority>2</filterpriority>
public void Close()
_originalReader.Close();
/// <summary>
/// Returns a <see cref="T:System.Data.DataTable"/> that describes the column metadata of the <see cref="T:System.Data.IDataReader"/>.
/// </summary>
/// <returns>
/// A <see cref="T:System.Data.DataTable"/> that describes the column metadata.
/// </returns>
/// <exception cref="T:System.InvalidOperationException">The <see cref="T:System.Data.IDataReader"/> is closed.
/// </exception><filterpriority>2</filterpriority>
public DataTable GetSchemaTable()
return _originalReader.GetSchemaTable();
/// <summary>
/// Gets a value indicating the depth of nesting for the current row.
/// </summary>
/// <returns>
/// The level of nesting.
/// </returns>
/// <filterpriority>2</filterpriority>
public int Depth
get { return _originalReader.Depth; }
/// <summary>
/// Gets a value indicating whether the data reader is closed.
/// </summary>
/// <returns>
/// true if the data reader is closed; otherwise, false.
/// </returns>
/// <filterpriority>2</filterpriority>
public bool IsClosed
get { return _originalReader.IsClosed; }
#endregion
/// <summary>
/// Advances the data reader to the next result, when reading the results of batch SQL statements.
/// </summary>
/// <returns>
/// true if there are more rows; otherwise, false.
/// </returns>
/// <filterpriority>2</filterpriority>
public bool NextResult()
throw new NotImplementedException();
/// <summary>
/// Advances the <see cref="T:System.Data.IDataReader"/> to the next record.
/// </summary>
/// <returns>
/// true if there are more rows; otherwise, false.
/// </returns>
/// <filterpriority>2</filterpriority>
public virtual bool Read()
if (_batchSize == (_currentSessionRows))
return false;
if(_originalReader.Read())
_currentSessionRows++;
_rowCount++;
return true;
return false;
/// <summary>
/// Gets the number of rows changed, inserted, or deleted by execution of the SQL statement.
/// </summary>
/// <returns>
/// The number of rows changed, inserted, or deleted; 0 if no rows were affected or the statement failed; and -1 for SELECT statements.
/// </returns>
/// <filterpriority>2</filterpriority>
public int RecordsAffected
get { throw new NotImplementedException(); }
public virtual bool ResetState()
bool result = _currentSessionRows != 0;
if (result && RowsCopied != null)
RowsCopied(this, _rowCount);
_currentSessionRows = 0;
return result;
public class VirtualSourceReader:SourceDataReaderWrap
private readonly int _totalRecordCount;
public VirtualSourceReader(IDataReader reader, int batchSize, int totalRecordCount)
:base(reader, batchSize)
_totalRecordCount = totalRecordCount;
public override bool Read()
if (_rowCount >= totalRecordCount || totalRecordCount <= 0)
return false;
if (_rowCount == 0)
return base.Read();
if (_batchSize == _currentSessionRows)
return false;
_currentSessionRows++;
_rowCount++;
return true;
*****************File::tmp.data**********You have problem because the batch size property has value *10000* and amount of records(*50000*) bigger than this value.
You can retrieve workaround from my post (OracleBulkCopy have memory leak if BatchSize is less than record's count.
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