Avoid Bug 7146375 ORA-4030 MEMORY LEAK IN (Xml generation) in oracle 10g
Hi All,
I have to generate an xml from database which contains around 4 lac records. I had written a query using XmlSerialize and XmlElement.
It does run properly for records less than 2 lacs.
But when the record count goes above 2 lacs..it is throwing the following error -
{ ORA-04030: out of process memory when trying to allocate 1032 bytes (qmxlu subheap,qmemNextBuf:alloc)
ORA-06512: at "SYS.XMLTYPE", line 111!}
For the above error - I have tried increasing pga from 480M to 800M, but still we are getting the same error.
After researching i found out -
Cause
This is caused by the following bug:
Bug 7146375 ORA-4030 AND MEMORY LEAK IN SESSION HEAP: "KOH DUR HEAP D"
Solution
Bug 7146375 is fixed in 11.2
So i tried out the query in another a db which has 11g installed and my query runs perfectly fine for records of upto 4 lacs.
But since we have oracle 10g on our clients machine, are there other ways to achieve this XML generation other than this?
Thanks.
913389 wrote:
After researching i found out -
Cause
This is caused by the following bug:
Bug 7146375 ORA-4030 AND MEMORY LEAK IN SESSION HEAP: "KOH DUR HEAP D"
Solution
Bug 7146375 is fixed in 11.2
So i tried out the query in another a db which has 11g installed and my query runs perfectly fine for records of upto 4 lacs.
But since we have oracle 10g on our clients machine, are there other ways to achieve this XML generation other than this?I doubt it. If Oracle have investigated and created a bug report that says the solution is to upgrade to 11.2, then that's the answer, otherwise they would indicate that a particular 10g patch set can also be used.
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[Bug?] X-Control Memory Leak with Large Data Array
[LV2009]
[Cross-posted to LAVA]
I have found that if I pass a large data array (~4MB in this example) into an X-Control, it causes massive memory allocations (1 GB+).
Is this a known issue?
The X-Control in the video was created, then the Data.ctl was changed to 2D Array - it has not been edited in any other way.
I also compare the allocations to that of a native 2D Array (which is only ~4MB).
Note: I jiggled the Windows Task Manager about so that JING would update correctly, its a bit slow, but it essentially just keeps rolling up and doesn't stop.
Demo code attached.
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Unable to display content. Adobe Flash is required.
Certified LabVIEW Architect * LabVIEW Champion
Attachments:
X Control Bug [LV2009].zip 42 KBHi Jon (cool name)
Thank you very much for your reply. We came to this conclusion in the cross post and it is good to have it confirmed by LabVIEW R&D. Your response is also similar to that of my AE which I got this morning as well - see below:
Note: Your reference number is included in the Subject field of this
message. It is very important that you do not remove or modify this
reference number, or your message may be returned to you.
Hi Jon,
You probably found some information from the forum. The US engineer has gotten back and he said that unfortunately that's expected behaviour after they have conducted some tests and this is what he replied:
"X Controls in the background use events structures. In particular the Data Change Event is called when the value of the XControl changes (writing to the terminal, local variable, or value change property). What is happening in this case is the XControl is getting called to fast with a large set of data that the event structure is queuing the events and data that a memory leak is produced. It is, unfortunately, expect behavior. The main work around for the customer in this case is not call the XControl as often. Another possibility is to use the Synchronous Display Property to defer updates to the Xcontrol, this might slow down a leak."
He would also like to know if you can provide with more details how you are using the Xcontrol, perhaps there is a better way. Please refer to the link below for synchronous display. Thank you.
http://zone.ni.com/reference/en-XX/help/371361G-01/lvprop/control_synchronous_display/
In my application I updated the X-Control @ 1Hz and it allocated at MBs/s up to 1+GB before it crashed, all within a few hours. That is why I called it a leak. I am really worried that if this CAR gets killed, there will still be an issue lingering that makes using X-Controls a major problem under the above conditions. I have had to pull two sets of libraries from my code because of this - when they got replaced with native LabVIEW controls the leak when away (but I lost reuse and encapsulation etc...).
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I look forward to discussing this with you further.
Regards
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Certified LabVIEW Architect * LabVIEW Champion -
Memory leak in "Tenured Generation" heap (JVM 1.5)?!
For about over a year, I'm trying to hunt down the memory leak in our server application. But after all the improvements I've made (especially with 'forgotten' listeners that didn't exist anymore), I'm confident that the application doesn't have a memory leak anymore. At least the new "jconsole.exe" tool of JDK 1.5 shows me a very intersting behaviour:
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http://java.sun.com/j2se/1.5.0/docs/guide/management/jconsole.html#memory
where you might find a very slight tendency up. I run jconsole the whole day to track the application on a computer where no jobs got processed, so the application only sit there there whole day and just one thread has a loop that polls a database table via JDBC and doesn't get a result. The result is, that the memory chart is like the chart in the screenshot of the link above just with much more jaggies. About every 20 minutes, garbage collection seems to kick in, as the jaggie line drops about several megabytes just to increase again slowly.
Of course the thread loop creates objects but it doesn't hold any (debugged it several times and it is quite easy code). So this behaviour makes sense. But it doesn't make sense that the memory usage overall slowly increases over many hours (ultimativaly leading to an OutOfmemoryError).
So far, I still thought, it must be a memory leak in my application. But then, I played with jConsole and noticed this: if I just display the Memory Pool "Eden Space", the jagged line always drops down to the same level, i.e. no memroy leak. The "Survivor Space" is also constant in average (no memory leak). But the "Tenured Generation" line shows this memroy leak behaviour (slowly increases). This space is described as:
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So, I'm not so sure anymore if this memory must be in my application. Unfortunately, jConsole doesn't show some kind of object tree that can be browsed and I would see what kind of object (collection) increase.
I tried profiling my application, but the profiled app runs so slowly that it would need many days or weeks until it's possible to identify some bad objects.
Is there another way to identify such memory waisters?Write a main() that does the polling in a tight loop 1000 times. Then System.gc(); Thread.sleep(1000); System.exit(). Run the thing with -Xrunhprof. Observe the "live bytes" and "live objs" columns in the generated java.hprof.txt file. Anything that strikes as suspicious? If every polling round leaks one object, there's likely to be 1000 (or N*1000) of something live. Make sure the leak is in the polling routine by running it 1,000,000 rounds and getting an OutOfMemory.
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How can I solve memory lick, which occurs when operate Oracle 10g DB ?
I'm using Dell power Edge2850 server(dual CPU, 4GB Ram), RedHat AS 3 and Oracle 10g SE ONE. When I started the server, transaction speed was very fast. But after several day, the system has been getting slower seriously.
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Gives ORA-12560: TNS: protocol adapter error when installing oracle 10g
I tried to install oracle 10g r2 in server 2008. but it gives ORA-12560: TNS: protocol adapter error when installing. how I can fix this issue??? please help me ASAP. because its urgent.
thanks in advance.
chamaraWelcome to the forums !
Pl indicate which version of 10g you are installing and on which version of Win 2008. Neither 10gR1 nor 10gR2 are certified to be installed on Win 2008 R1, AFAIK.
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Dispatcher stopped due to shared memory realm does not exist in Oracle 10g
Hi Gurus,
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This is R3trans version 6.14 (release 700 - 12.12.08 - 14:04:00).
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Bug report select statement nested select in FROM Clause on Oracle 10g
The SELECT statement below does not return the appropriate result; it used to work on Oracle 8, but it does not on 10g (10.2).
Here is the table
create table T (
A numeric(4),
B numeric(4)
Some data
insert into T (A,B) VALUES (1,null);
insert into T (A,B) VALUES (2,1);
insert into T (A,B) VALUES (3,1);
insert into T (A,B) VALUES (3,2);
The select statement returning the worng result
select totals.A, totals.totalBbyA
from (
select t1.A, sum(t1.B) totalBbyA
from T t1
group by A
) totals
where
totals.totalBbyA >= all
select sum(nvl(t2.b,0)) from T t2 group by t2.a
it returns "no rows selected"
An equivalent select that does return the good result
select t1.A, sum(t1.B) totalBbyA
from T t1
group by A
having
sum(t1.B) >= all
select sum(nvl(t2.b,0)) from T t2 group by t2.a
It returns
A TOTALBBYA
3 3
Best regards910893 wrote:
but it does not on 10g (10.2).Works fine in:
SQL> select *
2 from v$version
3 /
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Prod
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for 32-bit Windows: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
SQL> select *
2 from t
3 /
A B
1
2 1
3 1
3 2
SQL> select totals.A, totals.totalBbyA
2 from (
3 select t1.A, sum(t1.B) totalBbyA
4 from T t1
5 group by A
6 ) totals
7 where
8 totals.totalBbyA >= all
9 (
10 select sum(nvl(t2.b,0)) from T t2 group by t2.a
11 )
12 ;
A TOTALBBYA
3 3
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Finding Memory leaks in C using Visual Studio 2013
I am using Visual Studio 2013, and taking a course in C programming and we started
talking about memory bugs detaction, in particular memory leaks, and how to detect them using Valgrind on Linux.
I want to know if there is a way to detect such memory leaks using VS 2013. I tried searching online but it just leads to lots of articles and blogs and msdn posts and blogs with lots of words like dump files, and analyzing them, etc which is weird
because:
1) It sounds so complex, convoluted and unintuitive it is actually hard to comprehend it.
2) The main reason this is weird is due to the fact that VS is the most advanced IDE around and Microsoft spends so much money on in, yet from what I have read it seems that there is no simple way to use VS to detect memory leaks
- certainly no way that's as simple as Valgrind where I only have to compile the program and run the command valgrind -leaks-check=yes ProgramName
and it simply prints to me all location it thinks there is a memory leak and describes the error (like not freeing memory after allocating it with malloc hence having "dead" memory after the program finishes, or accessing memory that's out of
the array bounds)
So my question is how to use VS 2013 in order to achieve the same results and to find out First in high level if there are memory leaks in the program, and Second - to detect in a simple manner where those leaks are- preferably without involving dump files
(not that I know how to use them anyway in VS).Hi MicrosoftLaw,
Thanks for your post.
Based on your issue, if you want to check if there are memory leaks in the C program from this VS2013. I suggest you could try to find Memory Leaks Using the CRT Library, for more information:
https://msdn.microsoft.com/en-us/library/x98tx3cf.aspx?f=255&MSPPError=-2147217396
In addition, I find a similar thread about this issue, please you refer the Dusty's suggestion to check this issue.
http://stackoverflow.com/questions/45627/how-do-you-detect-avoid-memory-leaks-in-your-unmanaged-code
I did some research about this issue, I found that the Visual Leak Detector extension tool is a free, robust, open-source memory leak detection system for Visual C++. So if possible, I suggest you could try to use the Visual Leak Detector extension
tool to find the memory leak for Visual C/ C++ program.
https://visualstudiogallery.msdn.microsoft.com/7c40a5d8-dd35-4019-a2af-cb1403f5939c
However, if you have any issue about how to use this Visual Leak Detector extension tool to find the memory leak for C program. I suggest you could directly to write a review to this REVIEW tab in Visual Leak Detector site.
Best Regards,
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I'm running DS6.2 (from JES5 update 1) on a sparc cluster running Solaris 9. I have 6 replicas on standalone boxes running Solaris 10 x86. ALL of them are experiencing massive memory leaks. My DB is only about 150MB and my typical ns-slapd size is 1.2GB. On the cluster, it grew to 8GB, I finally restarted the process before it would crash and cause problems. On one of the replicas, it grew to over 4GB and evertually ran out of memory and ns-slapd crashed. It restarted OK.
Has anyone else heard of this or had this happen to them?
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6619060
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Telemetry + uploadFromBitmapData == Memory leak, crash
Hi all,
This bug/crash is a memory leak that only occurs when utilizing texture upload and -advanced-telemetry at the same time.
Testcase at: http://onetacoshort.com/temp/telemetry_leak.zip
Testcase README file is as follows:
Using Scout to debug an app compiled with -advanced-telemetry using the new ASC2.0 compiler, uploading textures via:
flash.display3D.textures.Texture.uploadFromBitmapData(bd);
causes a memory leak and eventual crash. Observed when using AIR 3.6 - 3.8 on both iOS and Android.
Memory usage in the "Other" category rises infinityly in steps until the app crashes (see scout_screenshot_telemetry.jpg).
If compiled without -advanced-telemetry, the app runs properly (see scout_screenshot_without.jpg)
Note that if the Testcase app is not connected to a Scout instance (i.e. Adobe Scout app not installed, or not enabled), it does not crash.
So it's probably not critical, but it's a testing irritation.
Best,
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Thanks for the heads up. Would you mind copy/pasting this report over to bugbase.adobe.com as a new bug report? Once added please shoot me the bug number and I'll follow up internally.
Thanks,
Chris -
Memory issue, Oracle 10g in Solaris 10 zone
I know many memory questions have been asked, but I couldn't find any similar to the problem I'm seeing.
Starting from a fresh server boot, I have 12G of available memory, or nearly that anyway. Oracle 10g is installed with no databases created.
After creating a database and running a few sql scripts to create tablespaces and users, my available memory is down to 3.5G.
Rebooting the solaris zone containing Oracle does not restore any available memory. Shutting down the database does not restore any available memory.
Why does Oracle seem to absorb so much available memory and not release it? I created the database from scripts and restricted the overall sga by a good bit over the defaults and while this did reduce the memory the oracle processes use, I'm still seeing this continual absorption of memory to the point where running any imports takes forever because my memory seems to bottom out. I saw it go down (using top, and vmstat) to about 500M at one point.
Is there any utility that I can use, either solaris or sqlplus that will free up system memory?
Message was edited by:
tsmoriAfter creating a database and running a few sql scripts to create tablespaces and users, my available memory is down to 3.5G.
What are your settings fpr SGA_MAX_SIZE, SGA_TARGET and PGA_AGGREGATE_TARGET?
Shutting down the database does not restore any available memory.
Hmm that's really strange. We are running Oracle 9i on Solaris 10 Containers and didn't have any problems with memory leaks.
Dim -
Oracle 10g R2 x64 Windows - Memory allocation
I've installed Oracle 10g R2 x64 on Windows Server 2003 STD X64.
My SGA is configured to use 65% of total memory (3,5Gb).
After few days since instance startup, virtual meory size grow up to 6Gb and OS crash.
Anyone can help me?
Thanks in advanceYou might have to work with Oracle support see if you have memory leaking problem.
While your oracle.exe growing VM size, run a statspack report and following query for a quick checking,
select * from v$sgainfo
1 select se.sid, n.name, max(se.value) maxmem
2 from v$sesstat se,
3 v$statname n
4 where n.statistic#=se.statistic#
5 and n.name like 'session pga%'
6 group by n.name, se.sid
7* order by 3 desc
SQL> /
SID NAME MAXMEM
216 session pga memory max 11836008
216 session pga memory 11687880
212 session pga memory max 7960728
225 session pga memory max 5880632
200 session pga memory max 5282408
200 session pga memory 5282408
217 session pga memory max 3995992
217 session pga memory 3668312
214 session pga memory max 3626952
212 session pga memory 3176600
.... -
"In-Memory Database Cache" option for Oracle 10g Enterprise Edition
Hi,
In one of our applications, we are using TimesTen 5.1.24 and Oracle 9i
databases (platform - Solaris 9i).
TimesTen holds application information which needs to be accessed quickly
and Oracle 9i is a master application database.
Now we are looking at an option of migrating from Oracle 9i to Oracle 10g
database. While exploring about Oracle 10g features, came to know about
"In-Memory Database Cache" option for Oracle Enterprise Edition. This made
me to think about using Oracle 10g Enterprise Edition with "In-Memory
Database Cache" option for our application.
Following are the advantages that I could visualize by adopting the
above-mentioned approach:
1. Data reconciliation between Oracle and TimesTen is not required (i.e.
data can be maintained only in Oracle tables and for caching "In-Memory
Database Cache" can be used)
2. Data maintenance is easy and gives one view access to data
I have following queries regarding the above-mentioned solution:
1. What is the difference between "TimesTen In-Memory Database" and
"In-Memory Database Cache" in terms of features and licensing model?
2. Is "In-Memory Database Cache" option integrated with Oracle 10g
installable or a separate installable (i.e. TimesTen installable with only
cache feature)?
3. Is "In-Memory Database Cache" option same as that of "TimesTen Cache
Connect to Oracle" option in TimesTen In-Memory Database?
4. After integrating "In-Memory Database Cache" option with Oracle 10g, data
access will happen only through Oracle sqlplus or OCI calls. Am I right here
in making this statement?
5. Is it possible to cache the result set of a join query in "In-Memory
Database Cache"?
In "Options and Packs" chapter in Oracle documentation
(http://download.oracle.com/docs/cd/B19306_01/license.102/b14199/options.htm
#CIHJJBGA), I encountered the following statement:
"For the purposes of licensing Oracle In-Memory Database Cache, only the
processors on which the TimesTen In-Memory Database component of the
In-Memory Database Cache software is installed and/or running are counted
for the purpose of determining the number of licenses required."
We have servers with the following configuration. Is there a way to get the
count of processors on which the Cache software could be installed and/or
running? Please assist.
Production box with 12 core 2 duo processors (24 cores)
Pre-production box with 8 core 2 duo processors (16 cores)
Development and test box with 2 single chip processors
Development and test box with 4 single chip processors
Development and test box with 6 single chip processors
Thanks & Regards,
VijayHi Vijay,
regarding your questions:
1. What is the difference between "TimesTen In-Memory Database" and
"In-Memory Database Cache" in terms of features and licensing model?
==> Product has just been renamed and integrated better with the Oracle database - Times-Ten == In-Memory-Cache-Database
2. Is "In-Memory Database Cache" option integrated with Oracle 10g
installable or a separate installable (i.e. TimesTen installable with only
cache feature)?
==> Seperate Installation
3. Is "In-Memory Database Cache" option same as that of "TimesTen Cache
Connect to Oracle" option in TimesTen In-Memory Database?
==> Please have a look here: http://www.oracle.com/technology/products/timesten/quickstart/cc_qs_index.html
This explains the differences.
4. After integrating "In-Memory Database Cache" option with Oracle 10g, data
access will happen only through Oracle sqlplus or OCI calls. Am I right here
in making this statement?
==> Please see above mentioned papers
5. Is it possible to cache the result set of a join query in "In-Memory
Database Cache"?
==> Again ... ;-)
Kind regards
Mike
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Error message: an invalid join type has been encountered
Hi, I've created a report that works fine for me, using CR version 11.0.0.1282. The report is intended to be posted on our intranet, using Crystal Enterprise. But our web team tried it and said: The report returned "Failed to open rowset" errors on e