App performs inconsistantly...how to check for memory leaks?
I (was!) almost done with an app to submit to the app store but when I tested the final build on my iPad it started performing strangely.
It had never done this before, but it's crashing almost CONSTANTLY. Every few seconds or so. I haven't changed much of anything since the last time I tested it and I can't really figure out what would cause it to crash so much.
From the menu you can choose a button to go to other frames in the main timeline. Half of those work, half of them make the app crash. This is new and I think I might have a memory leak somewhere because it's consistently inconsistent.
At first I thought I had a stack overflow somewhere; however, testing in mobile debug mode doesn't cause any errors or even warning output messages - nothing. It runs just fine.
So is it possible that the problem is stemming from hardware? I can't imagine this app would be using up too much memory - it is full of vectors, but there's nothing more complicated than touch and drag because it's just a puzzle.
How would I test something like this if debug mode isn't throwing any exceptions?
You may want to try MonsterDebugger (free, open source). It also serves as a profiler. You might be able to get a better understanding on what your app is doing (and why it might be breaking on the iPad).
Similar Messages
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How to configure license file for Memory Leak tool and WL Server 9.2?
(I posted to general JRockit forum before realizing existence of this forum which is probably more applicable.)
Here's our problem:
Running latest version of WL 9.2 MP3 and JRockit Mission Control 3.0.1
Able to run Mission Control, and connect to the WL Server and to run View Console with no problems.
I can't get Memory Leak tool to run because it complains about needing a license file.
First I tried with off the shelf WL 9.2 MP3.
Get error:
A license for Memory Leak Detector could not be found on the JRockit at (1.5) weblogic.Server (192).
Error: Can not find component Memory Leak Detector for JRockit * in the license file. Please check http://www.jrockit.com/license for license updates.
So I downloaded license file from JRockit download site - wls92.zip. It contains several files, but no clear instructions on what to do with these files. I copied one of these files "LIC-WLSP92.txt" to my JRockit home as C:\bea\JROCKI~1\jre\license.bea
Tried again. Restarted WL server. Restarted JRockit Mission Control.
Get error: A license for Memory Leak Detector could not be found on the JRockit at (1.5) weblogic.Server (3052).
The license file does not exist at: C:\bea\JROCKI~1\jre\license.bea
Any advise on how to install license or who to contact for help?Installed Mission Control 3.0.3.
Got following message when I attempted to run Memory Leak:
A license for Memory Leak Detector could not be found on the JRockit at (1.5) weblogic.Server (192).
Error: Can not find component Memory Leak Detector for JRockit * in the license file.
Please check http://www.jrockit.com/license for license updates.
I believe that we're using the latest downloads of WebLogic 9.2.x and JRockit.
WebLogic is running using 9.2.3 and JRockit build R27.4.0-90_CR358515-94243-1.5.0_12-20080118-1154-windows-ia2
Contents of C:\bea\jrockit_150_12\jre\license.bea:
<?xml version="1.0" encoding="ISO-8859-1"?>
<bea-licenses>
<license-group format="1.0" product="JRockit" release="*">
</license-group>
</bea-licenses>
Could WebLogic be misconfigured?
Any diagnostics to help figure out the licensing?
Any other ideas? -
How to check the Memory consumtions and time taken by a Java Program??
HI all,
I want to know how to check for the Memory Usage of an XML Parser.
See, a product was developed completely in DOM parser and now I am replacing that thing with SAX Parser Completely, because the DOM parser was taking huge memory as u may have guessed.
BUt the thig is that, now I want to check how much memory is being taken by the SAX parser alone and DOM parser alone so that I can compare them.
Can anyone suggest me how to do that ???
Thanx in Advance
KaushikThanx boss ..thanx a lot
I tried that, but in the API docs, it is mentioned that freeMemory()Returns the amount of free memory "in the system"
and totalMemory() Returns the total amount of memory in the "Java Virtual Machine".
So if I compare both the Values then would it give the Correct result to me ???? Beacuse the freeMemory() gives the data in terms of the Host System whereas totalMemory() provides the data in terms of Java Virtual Machine ..... are they Same ?????
I think I am clear in explaining what exactly is going on my mind ...
Please clarify
Thanx again
Kaushik -
How to check for updates on SCM packages?
Hey guys,
I wondered for some time now how to check for updates on SCM packages, i.e. -git
or -svn ones. Updates for binary packages are automatically updated by pacman,
no problem there. Checking for updates on non-SCM packages from the AUR is
easily done with one of the various helper tools available (personally, I use
slurpy).
However, SCM packages can change without their PKGBUILD changing, so I'm not
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Is there a "proper" way of doing this? Am I missing something?
Thanks in advance!If your system is booting then u can say that your bootblks are installed.Usually BootBlks are present in 0 & 1 slice of UFS Filesystem
/usr/platform/platform-name/lib/fs/ufs
directory where ufs boot objects reside.
An x86 FDISK partition for the Solaris software begins with a one-cylinder boot slice, which contains the partition boot program (pboot) in the first sector, the standard Solaris disk label and volume table of contents (VTOC) in the second and third sectors, and the bootblk program in the fourth and subsequent sectors. When the FDISK partition for the Solaris software is the active partition, the master boot program (mboot) reads the partition boot program in the first sector into memory and jumps to it. It in turn reads the bootblk program into memory and jumps to it. Regardless of the type of the active partition, if the drive contains multiple FDISK partitions, the user is given the opportunity to reboot another partition. -
How to check for bootblk on Disk
Does someone know how to check for bootblk on solaris disk.
If your system is booting then u can say that your bootblks are installed.Usually BootBlks are present in 0 & 1 slice of UFS Filesystem
/usr/platform/platform-name/lib/fs/ufs
directory where ufs boot objects reside.
An x86 FDISK partition for the Solaris software begins with a one-cylinder boot slice, which contains the partition boot program (pboot) in the first sector, the standard Solaris disk label and volume table of contents (VTOC) in the second and third sectors, and the bootblk program in the fourth and subsequent sectors. When the FDISK partition for the Solaris software is the active partition, the master boot program (mboot) reads the partition boot program in the first sector into memory and jumps to it. It in turn reads the bootblk program into memory and jumps to it. Regardless of the type of the active partition, if the drive contains multiple FDISK partitions, the user is given the opportunity to reboot another partition. -
How to check the memory and CPU usage on NPU
Hi expert ,
Could you tell me how to check the memory and cpu usage on NPU?
I think ASR1000 has this command (show platform hardware qfp active...) , but I coudn't find the same command on ASR9001.
I checked " show controllers np counters all" command, but I did not find it.
Platform: ASR9001
version: 4.3.2
NP: Tyhoon
Thanks,Hi Kanako,
understand your question, but something like that doesnt exist for the trident/typhoon NPU's for the asr9k.
in fact cpu usage is not really applicable for parallel/serialized hardware forwarders, but mainly the KPI is here
the PPS it handles.
The max pps it can handle is dependent on feature set.
What you could do is measure the rates on the PARSE_FABRIC_RECEIVE count (packets received from fabric, so egress direction), PARSE_ENET_RECEIVE count (packets received from the interface to the fabric, so ingress) and the LOOPBACK count, that is packets that are recirculated for extra processing. The sum of these 3 gives an idea of the PPS rate the NPU is working on.
Memory consumption is something tricky also, there are many memories attached to the NPU, notably:
TCAM used for vlan matching, ACL and QOS matching
Search memory for L2 and L3 (shared on Trident, separated on Typhoon)
Frame memory for packet bufferin in QOS
Stats memory, for all kinds of counters of QOS maps, interface stats etc
their usage is rather dynamic also.
The few things you want to verify on these are:
- ACL usage (in terms of Tcam entries)
- MAC table size (2M max on typhoon)
- FIB size (4M max on typhoon)
frame memory is dependent on the buffering, which is a sum of all the packets instant queue length and size of all pmaps attached to interfaces served by the same NPU. there is no good overview as to how much you have available of that, but it has a rather significant size 1G or 2G depending on the TR or SE cards (typhoon specific).
regards
xander
Xander Thuijs CCIE #6775
Principal Engineer
ASR9000, CRS, NCS6000 & IOS-XR -
How to check for a function module with its description and functionality
Hi all,
How to check for a function module,with its description and its functionality,in detail how can I know the purpose of a particular function module,how to search for a function module which suits my requirement .Hi,
You can search a FM of your requirement by putting in the Key words and searching for a FM. Like * KEYWORD * and then pressing F4.
Say for example you need to search something regarding converstion.
Search for * CONVERT * and press F4.
If there is something specfic like converting date to something you can give
DATE * CONVERT *
OR
CONVERT * DATE * and press F4.
Once you narrow down your search you will have a Function module documentation inside the Function module. Please note that all the FMs willl not have documentation.
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Want to know how to check for new line character in text file
Hi All,
I`m trying to read data from text file. However I`m not sure whether the data is in 1st line or nth line. Now I`m trying to read the text from the readline. But if text is "" and not NULL then my code fails. So I want to know how to check for new line character and go to next line to find the data. Please help.
Thanks
static int readandwriteFile(Logger logger,String filepath){
BufferedWriter out = null;
BufferedReader in = null;
File fr = null;
int get_count = 0;
try {
if(new File(filepath).exists())
fr= new File(filepath);
System.out.println("FileName: "+fr);
if(fr != null){
in = new BufferedReader(new FileReader(fr));
String text = in.readLine();
if(text != null){
get_count = Integer.parseInt(text);
in.close();
else{
get_count = 0;
else{
out = new BufferedWriter(new FileWriter(filepath));
out.write("0");
out.close();
} //Reading of the row count file ended.
catch(Exception e) {
e.printStackTrace();
finally {
try{ if (in != null) {
in.close();
if (out != null) {
out.close();
catch(Exception e) {
e.printStackTrace();
return get_count;
}You are calling the readline() only once which means you are reading only the first line from the file...
Use a loop (Do-While preferably)
do{
//your code
}while(text == "") -
How to check for the sub folder in the document library Is already Exist using CSOM?
Hi,
My requirement is to create the folder and sub folder in SharePoint document library. If already exist leave it or create the new folder and the subfolder in the Document library using client side object model
I able to check for the parent folder.
But cant able to check the subfolder in the document library.
How to check for the sub folder in the document library?
Here is the code for the folder
IsFolder alredy Exist.
private
string IsFolderExist(string InputFolderName)
string retStatus = false.ToString();
try
ClientContext context =
new ClientContext(Convert.ToString(ConfigurationManager.AppSettings["DocumentLibraryLink"]));
context.Credentials =
CredentialCache.DefaultCredentials;
List list = context.Web.Lists.GetByTitle(Convert.ToString(ConfigurationManager.AppSettings["DocumentLibraryName"]));
FieldCollection fields = list.Fields;
CamlQuery camlQueryForItem =
new CamlQuery();
camlQueryForItem.ViewXml =
string.Format(@"<View Scope='RecursiveAll'>
<Query>
<Where>
<Eq>
<FieldRef Name='FileDirRef'/>
<Value Type='Text'>{0}</Value>
</Eq>
</Where>
</Query>
</View>",
@"/sites/test/hcl/"
+ InputFolderName);
Microsoft.SharePoint.Client.ListItemCollection listItems = list.GetItems(camlQueryForItem);
context.Load(listItems);
context.ExecuteQuery();
if (listItems.Count > 0)
retStatus =
true.ToString();
else
retStatus =
false.ToString();
catch (Exception ex)
retStatus =
"X02";
return retStatus;
thanks
SundharHi Sundhar,
According to your description, you might want to check the existence of sub folder in a folder of a library using Client Object Model.
Please take the code demo below for a try, it will check whether there is sub folder in a given folder:
public static void createSubFolder(string siteUrl, string libName, string folderServerRelativeUrl)
ClientContext clientContext = new ClientContext(siteUrl);
List list = clientContext.Web.Lists.GetByTitle(libName);
CamlQuery camlQuery = new CamlQuery();
camlQuery.ViewXml =
@"<View Scope='RecursiveAll'>
<Query>
<Where>
<Eq>
<FieldRef Name='FSObjType' />
<Value Type='Integer'>1</Value>
</Eq>
</Where>
</Query>
</View>";
//camlQuery.FolderServerRelativeUrl = "/Lib1/folder1";
camlQuery.FolderServerRelativeUrl = folderServerRelativeUrl;
ListItemCollection items = list.GetItems(camlQuery);
clientContext.Load(items);
clientContext.ExecuteQuery();
Console.WriteLine(items.Count);
if (0 == items.Count)
//create sub folder here
Best regards
Patrick Liang
TechNet Community Support -
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Kindly let me know how to check for a lock on a particular table inside a program.I know that we can see locks on table held by a user from transaction SM12 but my requirement is to check for lock on MARA/MARC/MARV if lock exist then bypass my code else do the code.
Kindly suggest or give code to check for a lock on a particular table.
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SudiptoFAQ. Locked.
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How to check for impacts due to upgrade
We are plannining to upgrade from 4.7 to ECC6..How to check for impacts on FTP'S,shell scripts and RFC's etc due to the assesment..Please suggest
Hi,
FTP's and Shell scripts are OS dependant not SAP or Database dependant so there will be no change at all unless you upgrade OS too. RFC's are not afected as per guides, notes and my experience.
I´m doing an upgrade from 4.6C to 6.0 with connections with at least 10 systems and none of them had an issue during tests
Good luck -
Could someone please explain how to check for flashback, to a beginner?
Could someone please explain how to check for flashback, to a beginner? Thanks.
Install all of the available software updates. If you have flashback it will be automatically removed.
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How to define the memory leak in stability test
Hi
Usually, we run our system with 70% CPU load for 72 hours for stability test (on solaris 10), because some plugin of our system is using mtmalloc, and we use prstat to monitor the memory of each plugin. But because of the complex memory usage of our application, we don't know when the application will use the Max memory, and because of the "mtmalloc", the memory showed by "prstat" will not released but continually increased.
So fro the test point of view, there is the risk of memory leak, but actually, there may be no memory leak, so my question is how to define the memory leak in such condition.kevin wrote:
Thank you for the input and all the info.
isn't java heap the same as memory allocated to the java process in my weblogic
starup script ?The heap is sized by the -Xmx and -Xms parameters you pass on the java
command-line. The permanent generation is separate.
>
let me also download jprobe and try to run it and see what it gives me.
I'd start by running with -verbose:gc. I'd want to know whether you're
running out of heap or permgen space.
-- Rob
kevin
Rob Woollen <[email protected]> wrote:
Unfortunately memory leaks are not fun to track down even with tools.
I'd first suggest determining whether you're running out of space in
the
permanent area (where classes are loaded), or you've exhausted the java
help space.
I'd start by adding -verbose:gc. Look at the gc messages right before
you hit the OutOfMemoryError. If there's plenty of space left, I'd
suspect you're running out of perm space. Search these newsgroups and
the web for MaxPermSize, and you should see plenty of info.
If you're running out of java heap, tools like jprobe and OptimizeIt
are
helpful. If you can tell me a little more about your application and
how you're testing it, I can offer some more tips.
-- Rob
kevin wrote:
Iam new to JAVA and weblogic. I have an application that runs out ofmemory time
and again.
please let me know how to pin point this problem and moreover, howto interpret
or understand that there is a problem. I have downloaded JPROFILE tool,but it
is very confusing to understand what is goin on in this tool.
If somebody can let me know how to interpret and understand the memoryleak, that
will be great !!!
thank you. -
How to check for latest Apps in the App Store
Is there a way to check for the latest apps. I only see options to sort by name and by best-sellers. If there is no way how can i request this feature. Thanks.
As I understand the Mac App Store, that sort is already done for you in Features. The first category on the Features page is New and Noteworthy, with the link to See All.
Dah•veed -
HT6114 how to check for malware on my mac
My macpro is running slow all of a sudden. How do i check for malware?
No need, really. You've shown no evidence that malware would be causing the issue. Furthermore, OS X has its own built-in anti-malware protection. It's unlikely your problem is due to malware. See the following:
Things You Can Do To Resolve Slow Downs
If your computer seems to be running slower here are some things you can do:
Start with visits to: OS X Maintenance - MacAttorney;
The X Lab: The X-FAQs;
The Safe Mac » Mac Performance Guide;
The Safe Mac » The myth of the dirty Mac;
Mac maintenance Quick Assist.
Boot into Safe Mode then repair your hard drive and permissions:
Repair the Hard Drive and Permissions Pre-Lion
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
Repair the Hard Drive - Lion/Mountain Lion/Mavericks
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the Utilites Menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD disk icon and click on the arrow button below.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu. Select Restart from the Apple menu.
Restart your computer normally and see if this has helped any. Next do some maintenance:
For situations Disk Utility cannot handle the best third-party utility is Disk Warrior; DW only fixes problems with the disk directory, but most disk problems are caused by directory corruption; Disk Warrior 4.x is now Intel Mac compatible.
Note: Alsoft ships DW on a bootable DVD that will startup Macs running Snow Leopard or earlier. It cannot start Macs that came with Lion or later pre-installed, however, DW will work on those models.
Suggestions for OS X Maintenance
OS X performs certain maintenance functions that are scheduled to occur on a daily, weekly, or monthly period. The maintenance scripts run in the early AM only if the computer is turned on 24/7 (no sleep.) If this isn't the case, then an excellent solution is to download and install a shareware utility such as Macaroni, JAW PseudoAnacron, or Anacron that will automate the maintenance activity regardless of whether the computer is turned off or asleep. Dependence upon third-party utilities to run the periodic maintenance scripts was significantly reduced since Tiger. These utilities have limited or no functionality with Snow Leopard or later and should not be installed.
OS X automatically defragments files less than 20 MBs in size, so unless you have a disk full of very large files there's little need for defragmenting the hard drive.
Helpful Links Regarding Malware Protection
An excellent link to read is Tom Reed's Mac Malware Guide.
Also, visit The XLab FAQs and read Detecting and avoiding malware and spyware.
See these Apple articles:
Mac OS X Snow Leopard and malware detection
OS X Lion- Protect your Mac from malware
OS X Mountain Lion- Protect your Mac from malware
About file quarantine in OS X
If you require anti-virus protection I recommend using VirusBarrier Express 1.1.6 or Dr.Web Light both from the App Store. They're both free, and since they're from the App Store, they won't destabilize the system. (Thank you to Thomas Reed for these recommendations.)
Troubleshooting Applications
I recommend downloading a utility such as TinkerTool System, OnyX, Mavericks Cache Cleaner, or Cocktail that you can use for removing old log files and archives, clearing caches, etc. Corrupted cache, log, or temporary files can cause application or OS X crashes as well as kernel panics.
If you have Snow Leopard or Leopard, then for similar repairs install the freeware utility Applejack. If you cannot start up in OS X, you may be able to start in single-user mode from which you can run Applejack to do a whole set of repair and maintenance routines from the command line. Note that AppleJack 1.5 is required for Leopard. AppleJack 1.6 is compatible with Snow Leopard. Applejack does not work with Lion and later.
Basic Backup
For some people Time Machine will be more than adequate. Time Machine is part of OS X. There are two components:
1. A Time Machine preferences panel as part of System Preferences;
2. A Time Machine application located in the Applications folder. It is
used to manage backups and to restore backups. Time Machine
requires a backup drive that is at least twice the capacity of the
drive being backed up.
Alternatively, get an external drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is not significant):
1. Carbon Copy Cloner
2. Get Backup
3. Deja Vu
4. SuperDuper!
5. Synk Pro
6. Tri-Backup
Visit The XLab FAQs and read the FAQ on backup and restore. Also read How to Back Up and Restore Your Files. For help with using Time Machine visit Pondini's Time Machine FAQ for help with all things Time Machine.
Referenced software can be found at MacUpdate.
Additional Hints
Be sure you have an adequate amount of RAM installed for the number of applications you run concurrently. Be sure you leave a minimum of 10% of the hard drive's capacity as free space.
Add more RAM. If your computer has less than 2 GBs of RAM and you are using OS X Leopard or later, then you can do with more RAM. Snow Leopard and Lion work much better with 4 GBs of RAM than their system minimums. The more concurrent applications you tend to use the more RAM you should have.
Always maintain at least 15 GBs or 10% of your hard drive's capacity as free space, whichever is greater. OS X is frequently accessing your hard drive, so providing adequate free space will keep things from slowing down.
Check for applications that may be hogging the CPU:
Pre-Mavericks
Open Activity Monitor in the Utilities folder. Select All Processes from the Processes dropdown menu. Click twice on the CPU% column header to display in descending order. If you find a process using a large amount of CPU time (>=70,) then select the process and click on the Quit icon in the toolbar. Click on the Force Quit button to kill the process. See if that helps. Be sure to note the name of the runaway process so you can track down the cause of the problem.
Mavericks and later
Open Activity Monitor in the Utilities folder. Select All Processes from the View menu. Click on the CPU tab in the toolbar. Click twice on the CPU% column header to display in descending order. If you find a process using a large amount of CPU time (>=70,) then select the process and click on the Quit icon in the toolbar. Click on the Force Quit button to kill the process. See if that helps. Be sure to note the name of the runaway process so you can track down the cause of the problem.
Often this problem occurs because of a corrupted cache or preferences file or an attempt to write to a corrupted log file.
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