Memory leakage issue in Oracle-DOTNET environment

Hi,
One of my customer is facing a issue of memory leakage issue with their ASP.NET application. Following are the environment details
1. ASP.NET 3.5 application (Uses some Infragistics controls for grids)
2. SSRS for reporting
3. Oracle Server as database (details given below)
The memory leakage occurs while running load testing in his test environment.
The memory is consumed (in tune of 1.2 GB) and then performance is hit.
The memory dump is analyzed and we found Oracle client eating up a lot of memory which is not released.
We tried to use 11g driver also but without any improvements.
Environment Details :
1. Oracle server version –
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 – Production
2. Client version
We are using following oracle client version SQL*Plus: Release 10.2.0.1.0 – Production
(For performance purpose we have used following client version. SQL*Plus: Release 11.1.0.7.0 – Production)
3. ODP.NET version
Version of Oracle.DataAccess.dll is 2.111.7.10
It will be great if any body can help on this issue and guide us on the right track.
Thanks in advance.
Thanks & Regards,
Anoop

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

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Hi Don..
My case is different one. I hope, the problem with Run time Installation setup file (Crystal report 2008 Serivce Pack2 installer) which we installed in the server.
Let me explain with Live scenario which our client faced in crystal report 2008 Service pack2 Installer.
Our client is using a application to help to print their reports. The application is developed with Windows service.
Windows service keep on running in the server. Windows service executes the client 's crystal reports( Labels Report, Stock report) which designed for clients need and the reports will be printed from printer.
10 Same type report (Label Report) will be printed in 1 minute. Reports are not printing during non business hours. But the windows service keep on running. Memory cosumption of application will be 160 MB in business hours.
For Example, On Monday the application memory consumption starts with 160 MB. The Memory consumption will be reached 165 MB in peak business hours. Then the memory will be ended in163 MB in the End of Monday. It means, The memory consumption will be in 163 MB during the non business hours. Reports will not be printed in non business hours.
On Tuesday, the application memory consumption starts with 163 MB and it will be reached 168 MB during the peak hours. The Memory consumption will be ended in 165 MB in the end of Tuesday. The same process contiues till friday. End of friday, the memory consumption of the application will be ended with 170 MB.
Application Memory Consumption slowly increasing in the server. In 5 days, Memory consumption reached Threshold value (170 MB) of the server. Application gets hanged up once the memory consumption reached 170 MB. We got the error messages as "Attempted to read write protected memory " / "Not Enough memory for process". If we restart server / If we restart the service then memory consumption of application get reduced to 160 MB.
From the above scenario, We came know that the either the problem with Application object or the problem crystal report object. In the application, We have checked dispose methods of application objects completly. I am sure that application objects are properly disposed in the application. I hope the problem not with application objects. The problem with Crystal report objects.
Application properly communicates the dispose methods to crystal report objects. Crystal report objects are not released from
the memory.
Crystal report 2008 Serive Pack 2 setup installed in the server.
As you said, If Crystal report runtime is not released from memory then memory consumption keep increase??? In service oriented architecture application, how to unload the crystal report runtime??
Do you any fix for this kind of issue??
Willl Crystal report 2008 service pack 3 help on this issue??

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HI,
Some of the custom developed OAF screens in the instance 11.5.10 are resulting in drastic memory usage and hence the application goes out of memory.
Any suggestions to rectify this?
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What is Oracle version you are trying to connect(9i,10g, R2...)
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I have to calculate total memry in RAC environment.
For shared and buffer pool I execute show sga.
For UGA and PGA I execute statement that have two different values.
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Why I have very different value in this 2 statements on pga values?
first stat
with vs as
select 'PGA: ' pid
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from (select inst_id iid
,(select ss.value
from gv$sesstat ss
where ss.sid = s.sid
and ss.inst_id = s.inst_id
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from gv$sesstat ss
where ss.sid = s.sid
and ss.inst_id = s.inst_id
and ss.statistic# = 15) session_uga_memory
from gv$session s)
union all
select 'SGA: ' || name pid
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1 PGA: 196764792 <=====
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2 PGA: 77159560 <=====
2 SGA: Database Buffers 318767104
2 SGA: Fixed Size 733688
2 SGA: Redo Buffers 811008
2 SGA: Variable Size 335544320
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,p.pga_alloc_mem bytes
from gv$session s
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where pcur.statistic# in ( 20 -- = session pga memory
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and s.paddr = p.addr
and pcur.sid = s.sid
and pcur.INST_ID = s.INST_ID
and pcur.INST_ID = p.INST_ID
union all
select 'SGA: ' || name pid
,s.inst_id iid
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from gv$sga s
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1 SGA: Redo Buffers 811008
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2 SGA: Fixed Size 733688
2 SGA: Redo Buffers 811008
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I'm sorry but it is not clear to me.
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and
nearly 77MB of PGA mem on instance 2
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nearly 342MB of PGA mem on instance 1
and
nearly 186MB of PGA mem on instance 2
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I'd suggest running it from SQLPlus, where all your System.out.println statements will show up and you won't need to bother the DBA for that output ... unless you have already done so or if you happen to be the DBA. From the snippet you provided the only thing that looks like it could be null is "clb".

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I would really appreciate, if you can help me in this since I can't use the thin driver because of failover limitations.

I have noticed
that if the new connection to database fails and an
sql exception is thrown, memory used by the
application process increases.
How have you noticed this?I noticed this using the command pmap under solaris it operating system
every time I test reconnecting to database I go and check the memory used by the application before after attepmting to reconnect:
/usr/proc/bin/pmap [myapp pid] | tail -1
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This memory is not
garbage collected so application hangs.
Then it isn't a java problem. When java runs out of memory it throws a out of memory exception.Well I'm not saying it is a java problem for sure. I suspect that it might be oracle oci8 driver problem. I would appreciate if anyone can help in specifying teh source of the error.
I tried
similar behaviour with the oracle thin driver and
things went fine. There was no memory leakage.
I would really appreciate, if you can help me in this
since I can't use the thin driver because of failover
limitations.
I don't understand that last sentence at all.What I mean here is that instead of using the oci8 driver to connect to database I used the thin driver and kept everything else the same. I simulated the faliure to reconnect to database and based on the pmap command observations there was no memory leakage.
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Oracle AQAPI causing memory leakage

Good day
I am having a memory leakage on my production server which degrades and eventually dies, the cause is a job that is executed every five minutes which polls the Oracle Queue using the AQAPI. I can see that garbage collector is attempting to finalize() the AQOracleQueue, but this object is waiting on a lock.
My code is as follows:
package com.strysie.aq;
import java.sql.Connection;
import oracle.AQ.AQDequeueOption;
import oracle.AQ.AQDriverManager;
import oracle.AQ.AQMessage;
import oracle.AQ.AQQueue;
import oracle.AQ.AQSession;
*public class QueueDAO {*
*public QueuePayload dequeueMsg() throws Exception {*
AQSession session = null;
AQQueue queue = null;
Connection connection = null;
*try {*
connection = connectionFromPool();
connection.setAutoCommit(false);
session = AQDriverManager.createAQSession(connection);
queue = session.getQueue("mySchemaName", "myQueueName");
AQDequeueOption dequeueOption = new AQDequeueOption();
dequeueOption.setConsumerName("myConsumerName");
String browseMode = System.getProperty("AQBrowseOrDequeue");
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dequeueOption.setDequeueMode(AQDequeueOption.DEQUEUE_BROWSE);
AQMessage message = queue.dequeue(dequeueOption, new QueuePayload());
return (QueuePayload) message.getObjectPayload().getPayloadData();
*} catch (Exception ex) {*
throw ex;
*} finally {*
*try {*
*if (queue != null) {*
queue.close();
*} catch (Exception e) {*
e.printStackTrace();
*try {*
*if (session != null) {*
session.close();
*} catch (Exception e) {*
e.printStackTrace();
*try {*
*if (connection != null) {*
connection.commit();
*} catch (Exception e) {*
e.printStackTrace();
returnToPool(connection);
*private Connection connectionFromPool() {*
Connection connection = null;
*// fetch connection from pool*
return connection;
*private void returnToPool(Connection connection) {*
*// return connection to pool*
package com.strysie.aq;
import java.math.BigDecimal;
import java.sql.SQLException;
import oracle.jdbc.driver.OracleConnection;
import oracle.sql.CustomDatum;
import oracle.sql.CustomDatumFactory;
import oracle.sql.Datum;
import oracle.sql.STRUCT;
import oracle.sql.StructDescriptor;
*public class QueuePayload implements CustomDatum, CustomDatumFactory {*
public String account;
public BigDecimal amount;
static final QueuePayload message_t_Factory = new QueuePayload(null, null);
*public static CustomDatumFactory getFactory() {*
return message_t_Factory;
*public QueuePayload() {*
*public QueuePayload(String account_number, BigDecimal amount) {*
this.account = account_number;
this.amount = amount;
*public Datum toDatum(OracleConnection c) throws SQLException {*
StructDescriptor sd = StructDescriptor.createDescriptor("QUEUEPAYLOAD", c);
*Object[] attributes = { account, amount};*
return new STRUCT(sd, c, attributes);
*public CustomDatum create(Datum d, int sqlType) throws SQLException {*
*if (d == null) {*
return null;
Object[] attributes = ((STRUCT) d).getAttributes();
return new QueuePayload((String) attributes[0], (BigDecimal) attributes[1]);
** @return the account_number*
*public String getAccount() {*
return this.account;
** @return the amount*
*public BigDecimal getAmount() {*
return this.amount;
** @param account_number*
** the account_number to set*
*public void setAccount(String account_number) {*
this.account = account_number;
** @param amount*
** the amount to set*
*public void setAmount(BigDecimal amount) {*
this.amount = amount;
When I extract a thread dump I encounter the following on the Finalizer thread:
*"Finalizer" daemon prio=10 tid=0x00002aaab31c7800 nid=0x7469 waiting for monitor entry [0x0000000040a32000]*
java.lang.Thread.State: BLOCKED (on object monitor)
at oracle.jdbc.driver.OracleStatement.close(OracleStatement.java:1341)
- waiting to lock <0x00000007b0745288> (a oracle.jdbc.driver.T4CConnection)
at oracle.AQ.AQOracleQueue.close(AQOracleQueue.java:3225)
at oracle.AQ.AQOracleQueue.finalize(AQOracleQueue.java:3364)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:83)
at java.lang.ref.Finalizer.access$100(Finalizer.java:14)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:160)
Please assist.
Best regards
Rudi

Can only 'guess' since the code is missing that shows how the connection and statement instances are being created, pooled and used.
Your code is not setting the 'wait' option for the dequeue and the default is DEQUEUE_WAIT_FOREVER for a message. So my 'guess' is that an instance of the code you show is 'waiting' for a message and keeping it's connection and statement open and then another thread is trying to use that connection and it is locked or another thread is trying to shutdown the application when the problem appears.
See Dequeuing Messages in the JDBC Developer's Guide
http://docs.oracle.com/cd/B28359_01/java.111/b31224/streamsaq.htm#BABJGBBA
>
•Wait: Specifies the wait time for the dequeue operation, if none of the messages matches the search criteria. The default value is DEQUEUE_WAIT_FOREVER indicating that the operation waits forever. If set to DEQUEUE_NO_WAIT, then the operation does not wait. If a number is specified, then the dequeue operation waits for the specified number of seconds.
>
Try setting the 'wait' option to DEQUEUE_NO_WAIT or to a number of seconds and see if the problem reoccurs.
NOTE: If this problem is occuring because another thread is trying to use this same connection when it is locked it probably means you have a problem in your connection pooling code since it would mean the connection pool is allowing another thread to use a connection that is already being used.

Performance issues with Oracle EE 9.2.0.4 and RedHat 2.1

Hello,
I am having some serious performance issues with Oracle Enterprise Edition 9.2.0.4 and RedHat Linux 2.1. The processor goes berserk at 100% for long (some 5 min.) periods of time, and all the ram memory gets used.
Some environment characteristics:
Machine: Intel Pentium IV 2.0GHz with 1GB of RAM.
OS: RedHat Linux 2.1 Enterprise.
Oracle: Oracle Enterprise Edition 9.2.0.4
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Is anybody else having this similar behavior?
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Thank you very much and sorry I couldnt write sooner. It seems that the administrator doesnt see the kswap going on so much, so I dont really know what is going on.
We are looking at some queries and some indexing but this is nuts, if I had some poor queries, which we dont really, the server would show pick right?
But he goes crazy and has two oracle processes taking all the resources. There seems to be little swapping going on.
Son now what? They are all ready talking about MS-SQL please help me out here, this is crazy!!!
We have, may be the most powerful combinations here. What is oracle doing?
We even kill the Working Process of the IIS and have no one do anything with the database and still dose two processes going on.
Can some one help me?
Thanks,
Frank

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Hi,
We have two Oracle Database instances in a 32 bit Standard Edition Windows OS machine with 3 GB RAM : 1) 1525 MB (SGA+PGA) 2) 515 MB (SGA+PGA)
Recently we upgraded the RAM from 3 GB to 4 GB. Subsequently we upgraded the SGA + PGA of the 2nd instance to 771 MB.
This has resulted into PGA memory leak issue reported in the alert log file and trace file.
Reverting back the SGA+PGA size to 515 MB solved the issue.
Is this issue related to Address Windowing Extension (AWE)?
Is the reason related to Total memory for all the cumulative Oracle instance should be < 2GB.
How to solve this?
Mon Jul 15 08:21:25 2013
ORACLE V10.2.0.4.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Windows Server 2003 Version V5.2 Service Pack 2
CPU                 : 4 - type 586, 4 Physical Cores
Process Affinity    : 0x00000000
Memory (Avail/Total): Ph:1068M/4023M, Ph+PgF:4985M/7933M, VA:18M/2047M
Instance name: dp3
Redo thread mounted by this instance: 0 <none>
Oracle process number: 0
Windows thread id: 4484, image: ORACLE.EXE (SHAD)
*** 2013-07-15 08:21:25.133
*** ACTION NAME:() 2013-07-15 08:21:25.133
*** MODULE NAME:() 2013-07-15 08:21:25.133
*** SERVICE NAME:() 2013-07-15 08:21:25.133
*** SESSION ID:(90.829) 2013-07-15 08:21:25.133
******** ERROR: PGA memory leak detected 6302928 > 30176 ********
HEAP DUMP heap name="pga heap" desc=6C98A800
extent sz=0x206c alt=92 het=32767 rec=0 flg=3 opc=3
parent=00000000 owner=00000000 nex=00000000 xsz=0x0
EXTENT 0 addr=7FC10008
Chunk 7fc10010 sz=    64996    free      "               "
Chunk 7fc1fdf4 sz= 2097676    freeable "krfrbAllocate: "
Dump of memory from 0x7FC1FDF4 to 0x7FE20000
7FC1FDF0          1020020D 7FC10010 03871E90      [.. .........]
7FC1FE00 00000000 00000000 00000000 00000000 [................]
Repeat 131103 times
EXTENT 1 addr=7FA00008
Chunk 7fa00010 sz=    64996    free      "               "
Chunk 7fa0fdf4 sz= 2097676    freeable "krfrbAllocate: "
Dump of memory from 0x7FA0FDF4 to 0x7FC10000
7FA0FDF0          1020020D 7FA00010 03871E90      [.. .........]
7FA0FE00 00000000 00000000 00000000 00000000 [................]
Repeat 131103 times
EXTENT 2 addr=7F7F0008
Chunk 7f7f0010 sz=    64996    free      "               "
Chunk 7f7ffdf4 sz= 2097676    freeable "krfrbAllocate: "
Dump of memory from 0x7F7FFDF4 to 0x7FA00000
7F7FFDF0          1020020D 7F7F0010 03871E90      [.. .........]
7F7FFE00 00000000 00000000 00000000 00000000 [................]
Repeat 131103 times
EXTENT 3 addr=70A50008

There may be something fixed in the patch that gives the error rather than mysterious hangs. I would prefer that, myself. There may be something in the patch that changes how Oracle allocates user, system and program areas.
At some point you spend more trying to limp things along in a growing environment than simply upgrading. 32 bit environments these days is an indicator that management is figuring some false economies. But that's their prerogative.
The PGA can be affected by many things, not least of which is how the application uses it. Much has been written about it, my own experience has been more is used than most people say. But that is probably just my app. Note there are different ways to set it, and a parameter with "target" in it might not be a hard limit. Different execution plans for the same code may use different amounts of memory - there can even be situations where forcing some code to use a sort area instead, or even forcing more operations to disk, can free up more pga for everyone else. It depends. But that's why I look at multi-pass operations in dbconsole.

Oracle Portal environment comes to halt/crawl

We've got an Oracle Portal environment that will periodically crash (load excessivly slow, almost not loading at all, sometimes pages err out), and we're not entirely sure of the cause. When we experence the issues, the memory seems fine, the processes seems within an acceptable range, etc. We see nothing drastically different from when the system is stable and running smoothly.
If we restart the apps tier and all the WSRP-containers, this seems to have no effect. If we bounce ALL the services, from the apps->sso->oid->db and then bring them back up in reverse order, this seems to resolve the issue, but we still have no way of knowing what was the initial cause.
Anyone have any ideas of something that might be causing this issue, whne all the normal touchpoints seem to be fine?

Hi,
We are looking for similar upgrade? Were you able to make it?
If yes can you tell us the steps followed

Memory Leakage while parsing and schema validation

It seems there is some kind of memory leakage. I was using xdk 9.2.0.2.0. Later i found that from this forum which contain a Topic on this and they (oracle ) claim they have memory leakage. And they have fixes this bugs in 9.2.0.6.0 xdk. When i used truss command, for each call to parser and schame validation, it was opening file descriptor for lpxus and lsxus file. And this connections were not close. And keep on openning it with each call to parser. I was able to diagonise this using truss command on on solaris. After making many calls, i was error message could not open file Result.xsd (0202). I am using one instance of Parser and Schema. And i am doing clean up for parser after each parse.
Later i downloaded, 9.2.0.6.0,
Above problem for the parser was solvedm but still the problem continued for schema validation. And even i tried with latest beta release 10.
And this has caused great troubles to us. Please can u look whether there is come sort of leakage. Please advice if u have any solution.
Code---
This below code is called multiple times
char* APIParser::execute(const char* xmlInput) {
          char* parseResult = parseDocument(xmlInput);
          //if(strcmp(parseResult,(const char*)"")==0) {
if(parseResult == NULL) {
               parseResult = getResult();
parser.xmlclean();
     return parseResult;
          } else {
               return parseResult;
Parser and schema are intialised in Construtor and terminated in Destructor.

Hi, here is the complete test case
#include<iostream>
#ifndef ORAXML_CPP_ORACLE
# include <oraxml.hpp>
#endif
using namespace std;
#define FAIL { cout << "Failed!\n"; return ; }
void mytest(int count)
     uword ecode;
     XMLParser parser;
     Document *doc;
     Element root, elem;
     if (ecode = parser.xmlinit())
          cout << "Failed to initialze XML parser, error " << ecode << "\n";
          return ;
     cout << "\nCreating new document...\n";
     if (!(doc = parser.createDocument((oratext *) 0, (oratext *) 0,(DocumentType *) 0)))
     FAIL
     if (!(elem = doc->createElement((oratext *) "ROOT")))
               FAIL
     string test="Elem";
     for(int i=0;i<count;i++)
          //test="Elem"+string(ltoa(i));
          if (!(elem = doc->createElement((oratext *) "element")))
               FAIL
          if (!doc->appendChild(elem))
               FAIL
     //doc ->print();
     //parser.xmlclean();
     parser.xmlterm();
int main(int argc,char* argv[])
     int count=atol(argv[1]);
     mytest(count);
     char c;
     cout<<"check memory usage n press any key"<<endl;
     cin>>c;
     return 0;
-------------------------------------------cut here-----
Now, i cant use the xdk 10g because i work on a hpux machine. I have tried the above program with a count of 1000000. the memory usage at the end was around 2 gigabytes.
Could someone please please help me? :(
Thank you.

Memory leakage issue in Oracle-DOTNET environment

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