What is memory leak
hi,
can any body tell me wat we mean by "memory leak problm"
its resulting in failure of a process chain.
thanks
Hello,
Memory leaks are created by keeping a reference to objects that are not in use any more. Often, container objects (like the Java Collection Classes) are the source of such leaks. All objects or classes that are used to collect information are candidates for memory leaks. Especially static variables are dangerous, because the class object itself is not released by the garbage collector. This has to be kept in mind when static lists or maps are introduced.
chk this blog:
/people/krum.tsvetkov/blog/2007/07/02/finding-memory-leaks-with-sap-memory-analyzer
regards
GVS
Similar Messages
-
What is memory leak in Java context?
I am looking for a precise definition here...
If you are looking for HOW a memory leak can show up in java, here are a few examples:
A stack implemented on an array can have a memory leak if the object's position in the array isn't set to null after the object is popped off the stack (I think I first saw that in "effective java", by joshua bloch, if you want to look more into that).
Another way: interning strings to the jvm can cause a memory leak, because once a string is interned, it is stuck there forever, even if all other references to the string are gone, and the string will never again be used.
Furthermore, any flyweight concept that doesn't have a strategy for pruning away unused object (objects with 0 external remaining references) will be a memory leak of a sort.
Hash maps are another place you can run into this problem. They may hold the only reference to both objects of a pair, and hence, since the key exists nowhere else, the pair is basically useless, but the map does prevent them from being garbage collected.
What's the common link? The all have to do with some data structure or another maintaining obsolete references to objects. Since objects can't go out of scope if they are stored in a data structure that doesn't go out of scope, they cannot be garbage collected.
- Adam -
What is the best way to deal with memory leak issue in sql server 2008 R2
What is the best way to deal with memory leak issue in sql server 2008 R2.
What is the best way to deal with memory leak issue in sql server 2008 R2.
I have heard of memory leak in OS that too because of some external application or rouge drivers SQL server 2008 R2 if patched to latest SP and CU ( may be if required) does not leaks memory.
Are you in opinion that since SQL is taking lot of memory and then not releasing it is a memory leak.If so this is not a memory leak but default behavior .You need to set proper value for max server memory in sp_configure to limit buffer pool usage.However
sql can take more memory from outside buffer pool if linked server ,CLR,extended stored procs XML are heavily utilized
Any specific issue you are facing
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers -
My iMac keeps crashing due to a memory leak.... Any thoughts on what this means?
I'll be using my iMac (27" late 2009) and it will suddenly cut to black. Then after a second or two, a grey screen will appear and tell me an issue occured and to push any key to restart. Once the computer restarts, the issue report pops up and it says I have a memory leak. I don't know what that means, or how to fix it. Any thoughts on the cause of why it's doing this, or the impending doom it may be heralding? I've posted the issue report below incase anyone can glean anything from it. Thanks for your help.
Fri Feb 14 14:19:08 2014
panic(cpu 4 caller 0xffffff801185211d): "zalloc: zone map exhausted while allocating from zone kalloc.64, likely due to memory leak in zone kalloc.64 (2370900672 total bytes, 37045323 elements allocated)"@/SourceCache/xnu/xnu-2422.1.72/osfmk/kern/zalloc.c:2494
Backtrace (CPU 4), Frame : Return Address
0xffffff8104ed3a30 : 0xffffff8011822f69
0xffffff8104ed3ab0 : 0xffffff801185211d
0xffffff8104ed3bb0 : 0xffffff801182aa2f
0xffffff8104ed3be0 : 0xffffff8011c4bb5d
0xffffff8104ed3c10 : 0xffffff8011c4c0b7
0xffffff8104ed3c40 : 0xffffff8011c61b3a
0xffffff8104ed3c60 : 0xffffff8011c61b91
0xffffff8104ed3ca0 : 0xffffff8011c61d12
0xffffff8104ed3ce0 : 0xffffff8011c93663
0xffffff8104ed3d20 : 0xffffff8011c4abde
0xffffff8104ed3eb0 : 0xffffff8011c4ada7
0xffffff8104ed3ee0 : 0xffffff8011c8e4c3
0xffffff8104ed3f50 : 0xffffff8011c93cc4
0xffffff8104ed3f70 : 0xffffff7f923edbfb
0xffffff8104ed3fa0 : 0xffffff7f923edc6e
0xffffff8104ed3fb0 : 0xffffff80118d6aa7
Kernel Extensions in backtrace:
com.razer.common.razerhid(4.43)[1B7FEBF6-6668-A183-C80E-505105E80B16]@0xffffff7 f923e8000->0xffffff7f923fdfff
dependency: com.apple.iokit.IOUSBFamily(650.4.4)[972D3024-AF9C-3E09-A9EC-D9AB2A559B38]@0xff ffff7f921cb000
dependency: com.apple.iokit.IOHIDFamily(2.0.0)[1185D338-98A5-345E-84F8-E59DF819A61B]@0xffff ff7f92288000
dependency: com.apple.iokit.IOUSBHIDDriver(650.4.4)[B79A7E01-DD3F-3C1A-840A-879D262C69DE]@0 xffffff7f9230d000
dependency: com.apple.driver.IOBluetoothHIDDriver(4.2.0f6)[BDBCA485-A5D3-3EE0-A782-60D83447 BAEB]@0xffffff7f923d4000
BSD process name corresponding to current thread: kernel_task
Boot args: mbasd=1
Mac OS version:
13B42
Kernel version:
Darwin Kernel Version 13.0.0: Thu Sep 19 22:22:27 PDT 2013; root:xnu-2422.1.72~6/RELEASE_X86_64
Kernel UUID: 1D9369E3-D0A5-31B6-8D16-BFFBBB390393
Kernel slide: 0x0000000011600000
Kernel text base: 0xffffff8011800000
System model name: iMac11,1 (Mac-F2268DAE)
System uptime in nanoseconds: 6500042405956
vm objects:14896672
vm object hash entri:1422080
VM map entries:3665920
pv_list:14364672
vm pages:148044672
kalloc.16:296143584
kalloc.32:296364096
kalloc.64:2370900672
kalloc.128:8413184
kalloc.256:2584576
kalloc.512:2330624
kalloc.1024:5713920
kalloc.2048:1327104
kalloc.4096:1859584
kalloc.8192:6995968
ipc ports:3312960
threads:3060288
uthreads:1891008
vnodes:27132000
namecache:10648800
HFS node:36340432
HFS fork:4812800
buf.4096:2613248
buf.8192:34643968
ubc_info zone:2554704
vnode pager structur:1418040
Kernel Stacks:25870336
PageTables:75939840
Kalloc.Large:37970463
Backtrace suspected of leaking: (outstanding bytes: 60608)
0xffffff8011851c23
0xffffff801182aa2f
0xffffff8011c4bb5d
0xffffff8011c4d667
0xffffff8011c8e5e7
0xffffff8011c93cc4
0xffffff7f923edbfb
0xffffff7f923edc6e
Kernel Extensions in backtrace:
com.razer.common.razerhid(4.43)[1B7FEBF6-6668-A183-C80E-505105E80B16]@0xffffff7 f923e8000->0xffffff7f923fdfff
dependency: com.apple.iokit.IOUSBFamily(650.4.4)[972D3024-AF9C-3E09-A9EC-D9AB2A559B38]@0xff ffff7f921cb000
dependency: com.apple.iokit.IOHIDFamily(2.0.0)[1185D338-98A5-345E-84F8-E59DF819A61B]@0xffff ff7f92288000
dependency: com.apple.iokit.IOUSBHIDDriver(650.4.4)[B79A7E01-DD3F-3C1A-840A-879D262C69DE]@0 xffffff7f9230d000
dependency: com.apple.driver.IOBluetoothHIDDriver(4.2.0f6)[BDBCA485-A5D3-3EE0-A782-60D83447 BAEB]@0xffffff7f923d4000
last loaded kext at 280540738124: com.apple.filesystems.msdosfs 1.9 (addr 0xffffff7f92483000, size 65536)
loaded kexts:
com.taoeffect.ispy.kext 2.0.2
com.quark.driver.Tether64 1.1.0d3
com.logmein.driver.LogMeInSoundDriver 1.0.0
com.squirrels.airparrot.framebuffer 3
com.squirrels.driver.AirParrotSpeakers 1.7
com.razer.common.razerhid 4.43
at.obdev.nke.LittleSnitch 4052
com.apple.filesystems.msdosfs 1.9
com.apple.filesystems.ntfs 3.11
com.apple.driver.AppleTyMCEDriver 1.0.2d2
com.apple.driver.AGPM 100.14.11
com.apple.driver.AppleHWSensor 1.9.5d0
com.apple.driver.AudioAUUC 1.60
com.apple.filesystems.autofs 3.0
com.apple.iokit.IOBluetoothSerialManager 4.2.0f6
com.apple.driver.AppleMikeyHIDDriver 124
com.apple.driver.AppleUpstreamUserClient 3.5.13
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.driver.AppleHDAHardwareConfigDriver 2.5.3fc1
com.apple.kext.AMDFramebuffer 1.1.4
com.apple.driver.AppleHDA 2.5.3fc1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.ATIRadeonX2000 8.1.8
com.apple.driver.AppleHWAccess 1
com.apple.driver.AppleMuxControl 3.4.12
com.apple.driver.AppleBacklight 170.3.5
com.apple.driver.AppleMikeyDriver 2.5.3fc1
com.apple.iokit.IOBluetoothUSBDFU 4.2.0f6
com.apple.kext.AMD4800Controller 1.1.4
com.apple.driver.AppleMCCSControl 1.1.12
com.apple.driver.AppleLPC 1.7.0
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.0f6
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.driver.AppleUSBCardReader 3.3.5
com.apple.driver.AppleIRController 325.7
com.apple.driver.AppleFileSystemDriver 3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 35
com.apple.iokit.SCSITaskUserClient 3.6.0
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.4.0
com.apple.driver.AppleUSBHub 650.4.4
com.apple.driver.AppleFWOHCI 4.9.9
com.apple.iokit.AppleBCM5701Ethernet 3.6.9b9
com.apple.driver.AirPort.Atheros40 700.74.5
com.apple.driver.AppleAHCIPort 2.9.5
com.apple.driver.AppleUSBEHCI 650.4.1
com.apple.driver.AppleUSBUHCI 650.4.0
com.apple.driver.AppleACPIButtons 2.0
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleSMBIOS 2.0
com.apple.driver.AppleACPIEC 2.0
com.apple.driver.AppleAPIC 1.7
com.apple.driver.AppleIntelCPUPowerManagementClient 216.0.0
com.apple.nke.applicationfirewall 153
com.apple.security.quarantine 3
com.apple.driver.AppleIntelCPUPowerManagement 216.0.0
com.apple.kext.triggers 1.0
com.apple.iokit.IOSerialFamily 10.0.7
com.apple.iokit.IOSurface 91
com.apple.driver.DspFuncLib 2.5.3fc1
com.apple.vecLib.kext 1.0.0
com.apple.driver.AppleGraphicsControl 3.4.12
com.apple.iokit.IOFireWireIP 2.2.5
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.iokit.IONDRVSupport 2.3.6
com.apple.kext.AMDSupport 1.1.4
com.apple.AppleGraphicsDeviceControl 3.4.12
com.apple.iokit.IOAudioFamily 1.9.4fc11
com.apple.kext.OSvKernDSPLib 1.14
com.apple.driver.AppleSMBusController 1.0.11d1
com.apple.driver.AppleSMBusPCI 1.0.12d1
com.apple.driver.AppleHDAController 2.5.3fc1
com.apple.iokit.IOGraphicsFamily 2.3.6
com.apple.iokit.IOHDAFamily 2.5.3fc1
com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.0f6
com.apple.driver.AppleSMC 3.1.6d1
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.IOPlatformPluginFamily 5.5.1d27
com.apple.driver.IOBluetoothHIDDriver 4.2.0f6
com.apple.iokit.IOBluetoothFamily 4.2.0f6
com.apple.driver.AppleUSBHIDKeyboard 170.15
com.apple.driver.AppleHIDKeyboard 170.15
com.apple.iokit.IOSCSIBlockCommandsDevice 3.6.0
com.apple.iokit.IOUSBMassStorageClass 3.6.0
com.apple.iokit.IOUSBHIDDriver 650.4.4
com.apple.driver.AppleUSBMergeNub 650.4.0
com.apple.driver.AppleUSBComposite 650.4.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.6.0
com.apple.iokit.IOBDStorageFamily 1.7
com.apple.iokit.IODVDStorageFamily 1.7.1
com.apple.iokit.IOCDStorageFamily 1.7.1
com.apple.iokit.IOAHCISerialATAPI 2.6.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.0
com.apple.iokit.IOUSBUserClient 650.4.4
com.apple.iokit.IOFireWireFamily 4.5.5
com.apple.iokit.IOEthernetAVBController 1.0.3b3
com.apple.driver.mDNSOffloadUserClient 1.0.1b4
com.apple.iokit.IO80211Family 600.34
com.apple.iokit.IONetworkingFamily 3.2
com.apple.iokit.IOAHCIFamily 2.6.0
com.apple.iokit.IOUSBFamily 650.4.4
com.apple.driver.AppleEFINVRAM 2.0
com.apple.iokit.IOHIDFamily 2.0.0
com.apple.driver.AppleEFIRuntime 2.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 278.10
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 7
com.apple.driver.AppleKeyStore 2
com.apple.driver.DiskImages 371.1
com.apple.iokit.IOStorageFamily 1.9
com.apple.iokit.IOReportFamily 21
com.apple.driver.AppleFDEKeyStore 28.30
com.apple.driver.AppleACPIPlatform 2.0
com.apple.iokit.IOPCIFamily 2.8
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.pthread 1
com.apple.kec.corecrypto 1.0
Model: iMac11,1, BootROM IM111.0034.B02, 4 processors, Intel Core i7, 2.8 GHz, 8 GB, SMC 1.54f36
Graphics: ATI Radeon HD 4850, ATI Radeon HD 4850, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 1/DIMM1, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.74.0-P2P
Bluetooth: Version 4.2.0f6 12982, 3 services, 23 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: ST31000528ASQ, 1 TB
Serial ATA Device: HL-DT-ST DVDRW GA11N
USB Device: Hub
USB Device: Internal Memory Card Reader
USB Device: BRCM2046 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Hub
USB Device: Keyboard Hub
USB Device: Razer DeathAdder
USB Device: Apple Keyboard
USB Device: IR Receiver
USB Device: Built-in iSight
Thunderbolt Bus:Boot into safe mode (restart holding down SHIFT key). If no KP, then uninstall and reinstall those 3rd-party items that Roger pointed out, one at a time, and restart. Continue until you determine which ones are causing the problem. If KP while in safe mode, then most likely hardware related. Run the Apple Hardware Test suite, extended tests at least twice, followed by Rember. See
OS X About kernel panics,
Technical Note TN2063: Understanding and Debugging Kernel Panics,
Mac OS X Kernel Panic FAQ,
Resolving Kernel Panics,
How to troubleshoot a kernel panic, and
Tutorial: Avoiding and eliminating Kernel panics for more details. -
Editing in aperture is doing crazy things. I've read that it is memory leaks. Whats the cure?
Aperture is doing crazy things while editing like leaving spots on faces when using skin smoothing tool among other things. Closing and reopening fixes it but how annoying. I've read that it is caused from memory leaks. What do I do to fix this?
What is your Aperture version?
And your MacOS X version?
With Aperture 3 make sure you have the latest versions, Aperture 3.5.1 and OS 10.9.3.
The memory leaks you are referring to occurred with MacOS 10.9.1 and onscreen proofing enabled.
If yor versions are current, check your plug-ins for compatibility. -
MethodQueueElement Memory Leak....what to do?
I have a memory leak, all the users testing my Flex/AIR application are saying that after running my app for a while the whole computer completely starts slowing down. So I think this must be a memory link. I ran my app in the profiler, the only thing that seems to have a significant amount of memory is MethodQueueElement which seems like instances of this class just keep building up and never going away.
I couldn't find any info at all about this class, after researching myself I have found it to be a class defined inside the UIComponent class, which is used for storing methods to be called later. Thats about all I know though.
I have no idea how so many instances can be pilling up, I am creating new components all the time but always cleaning them out of memory, what can I do about this?
Thanks!!Which column shows the queue elements building up?
Both Cumulative Instances, and Instances
Its possible I am reading it wrong, I do not have much experience with profiling.
After I turned off the filters, I noticed 3 other classes that are causing a lot of memory.
BitmapData 165 instances 578784 memory (but the only bitmaps I am using are for MenuItem icons and system tray icon)
DataGridItemRenderer 308 instances 468160 memory
UITextField 320 instances 462016 memory
I only actually use couple of these components, they each are in a class that extends window, when the window closes and opens I create a NEW window, and close the previous one and set it to null, are these windows staying in memory maybe? should I not create a new window and just keep reopening the same window?
Thanks. -
What about the memory leak Bug in foreach tag
Hi,
does anybody knows if this bug is resolved already ?
http://issues.apache.org/bugzilla/show_bug.cgi?id=25623.
I see memory leaks in our application, and deeper check with YourKit profiler show that the objects retained in the jstl tags?
Any help?Thanks for the info.
The bug is in 'WONT FIX' status which is a shame.
ram. -
Applescript Image Events appears to have memory leak (or I don't know what I am doing)
Using Image Events to create images and thumbnails for a website. The following code results in very large memory leaks in Image Event process. I have documented results of test runs in the comments.
The leak (or poor coding on my part) results in a total system halt if I attempt to process more than about 400 images at a time. Basically, I run out ot physical memory. I am running a new model 13" MBP with 8GM RAM. I have to manually stop Image Events to reclaim the memory (or reboot of course).
Any help/suggestions would be appreciated.
(* test memory leak in Image Events *)
tests with 58 photos selected in iPhoto
5.7 MB left in Image Events after run with only open and close
22.0 MB left in Image Events after run with open, save and close
45.9 MB left in Image Events after run with open, scale, save and close
A run with 382 photos selected used OVER 3.8 GB (gigabytes) and the
mac ran out of physical memory so I had to stop the test.
tell application "Finder"
set imageFolder to folder "test" of home as alias
end tell
tell application "iPhoto"
set currPhotoList to the selection
repeat with currPhoto in currPhotoList
log name of currPhoto as string
set theImagePath to image path of currPhoto
tell application "Image Events"
launch
set theImage to open theImagePath
scale theImage to size 128
save theImage in imageFolder as JPEG with icon
close theImage
end tell
end repeat
end tell
--- end of code exampleDoes the following code do any difference? Most likely no I guess… but better try than nothing.
tell application "Finder"
set imageFolder to folder "test" of home as text -- instead of “as alias” (see theTargetPath below)
end tell
set theImagePaths to {}
set theImagePathsRef to a reference to theImagePaths -- faster with big lists
tell application "iPhoto"
set currPhotoList to the selection
repeat with currPhoto in currPhotoList
log name of currPhoto as string
get POSIX file (image path of currPhoto) as alias -- faster ?
copy result to the end of theImagePathsRef
end repeat
end tell
tell application "Image Events"
launch
repeat with theImagePath in theImagePaths
set theImage to open theImagePath
scale theImage to size 128
set theTargetPath to (imageFolder & name of theImagePath)
save theImage in theTargetPath as JPEG with icon
close theImage
end repeat
end tell -
How to determine memory leaks?
I tried in XCODE, the RUN/ Start with Performance TOol / and tried out the various options. I was running my app and looking to see if it would report increasing memory use but it seemed to be looking at my total system (i was running under the simulator). In general what is the recommended procedure for determining memory leaks, which tool to use, and what tracing can i use?
How does one look at the retain count of an object? are there system routines that have knonw leaks?You took the right path. Once instruments comes up select the Leaks tool. Turn off automatic leak detection. In your app, start off at some known state, do something, and come back to the known state and check for leaks. For instance start off in a view, do something that brings up another view then come back to the original view and check for leaks. Leaks will show you if you leaked. Since you took a very deterministic path then checked it should be straight forward to go to the code and find / fix the leaks. Leaks shows you where the code where the leak was generated.
-
Memory leak in JSpinner implementation (maybe others?)
Hi,
I am developing an application using Java and Swing, and have run into some problems with memory leaks. After examining the source code and making an example program (provided below), I can only come to the conclusion that there is a bug in the implementation of JSpinner in Sun Java 1.6.0_03.
If one uses a custom model with the JSpinner, it attaches itself as a listener to the model. However, it never removes the listening connection, even if the model is changed. This causes the JSpinner to be kept in memory as long as the model exists, even if all other references to the component have been removed.
An example program is available at http://eddie.dy.fi/~sampo/ModelTest.java . It is a simple swing program that has the JSpinner and two buttons, the first of which writes to stdout the listeners of the original model and the second changes the spinner model to a newly-created model. A sample output is below:
Running on 1.6.0_03 from Sun Microsystems Inc.
Listeners before connecting to JSpinner:
Model value is 0, 0 listeners connected:
Listeners after connecting to JSpinner:
Model value is 0, 2 listeners connected:
1: interface javax.swing.event.ChangeListener
2: javax.swing.JSpinner$ModelListener@9971ad
Listeners now:
Model value is 8, 2 listeners connected:
1: interface javax.swing.event.ChangeListener
2: javax.swing.JSpinner$ModelListener@9971ad
Changing spinner model.
Listeners now:
Model value is 8, 2 listeners connected:
1: interface javax.swing.event.ChangeListener
2: javax.swing.JSpinner$ModelListener@9971adThis shows that even though the model of the JSpinner has been changed, it still listens to the original model. I haven't looked at other components whether they retain connections to the old models as well.
In my case, I have an adaptor-model which provides a SpinnerModel interface to the actual data. The adaptor is implemented so that it listens to the underlying model only when it itself is being listened to. If the JComponents using the model were to remove the listening connections, it, too, would be automatically garbage-collected. However, since JSpinner does not remove the connections, the adaptor also continues to listen to the underlying model, and neither can be garbage-collected.
All in all, the listener-connections seem to be a very easy place to make memory leaks in Java and especially in Swing. However, as I see it, it would be a simple matter to make everything work automatically with one simple rule: Listen to the models only when necessary.
If a component is hidden (or alternatively has no contact to a parent JFrame or equivalent), it does not need to listen to the model and should remove the connections. When the component is again set visible (or connected to a frame) it can re-add the connections and re-read the current model values just as it does when initializing the component. Similarly, any adaptor-models should listen to the underlying model only when it itself is being listened to.
If the components were implemented in this way, one could simply remove a component from the frame and throw it away, and automatically any listener-connections will be removed and it can be garbage-collected. Similarly any adaptor-models are collected when they are no longer in use.
Changing the API implementation in this way would not require any changes to applications, as the only thing that changes are the listener-connections. Currently used separate connection-removing methods should still work, though they would be unnecessary any more. The API would look exactly the same from the view of an application programmer, only that she would not need to care about remnant listening connections. (As far as I can tell, the current API specification would allow the API to be implemented as described above, but it should of course require it to be implemented in such a way.)
Am I missing something, or is there some valid reason why the API is not implemented like this?
PS. I'm new to these forums, so if there is a better place to post these reports, please tell me. Thanks.Another cognition: It's the following code, that causes the memory to be accumulated:
obj = m_orb.resolve_initial_references("NameService");
ctx = NamingContextExtHelper.narrow(obj);For the first 4 calls to this code the memory usage of the nameservice is unchanged. From the 5th to the 8th call, it's increased by approx. 10KB per call. And thenceforward (beginning with the 9th call) it's increasing by approx. 10MB.
What's going wrong here? -
Memory Leaks Unresponsive Mouse
2009 8 core Mac Pro w/ 24 GB of RAM, ATI Radeon 4870, and a SeriTek PCIe eSATA card (card only has drives connected when running a manual drive clone). When running Toast 10 or Parallels 9, my RAM will fill up (I use a program called Menu Meters to monitor stuff). This machine worked just fine under OS 10.9 and earlier - no issues like this at all. ClamXAV will also completely fill the RAM up (the meter will be full green, instead of part green, then mostly grey when Toast or Parallels fills it up). I have to use Terminal to purge it so that the machine is usable.
The other thing that happens is that sometimes when the computer wakes up or I am in the middle of doing something, the mouse will still move, but the dock will not pop open and the left button the mouse doesn't respond. The right button will open the right click menu, but will not respond normally at all. I have tried a different Magic Mouse, but the problem is the same.
I thought that it may be a problem with the factory RAM and the Kingston RAM not playing nicely together. So I ran it with just the factory 8 GB and then ran it with the Kingston 16 GB - the problem persists no matter which RAM is installed. All of the RAM also passes the memory tests in Rember and TechTool.
So, I need to find out if someone thinks that maybe the bluetooth module may be going bad causing the mouse issues. I also need to find out what is causing the memory leaks. I followed the steps that someone gave on this site to boot into safe mode, repair permissions, reset PRAM, then reset SMC (or the other way around - I did it like they said to). It did nothing to fix the problem.
I need some guidance here. As I stated early on, the machine worked perfectly with OS 10.9. I have WAY too much software that I use, so doing a completely fresh install is out of the question - I don't have time to reload everything. This problem is annoying and I know that I am not the only one having these issues. Any input will be greatly appreciated. Thanks in advance.Here is the EtreCheck report:
Problem description:
Memory leaks when using Toast 10 or Parallels 9. Mouse also become unresponsive (it will move, but left button does not work and dock will not pop open - mouse problem happens independent of the RAM being filled up - different mouse was tried with same result).
EtreCheck version: 2.1.5 (108)
Report generated January 9, 2015 at 9:20:59 PM MST
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Click the [Adware] links for help removing adware.
Hardware Information: ℹ️
Mac Pro (Early 2009) (Verified)
Mac Pro - model: MacPro4,1
2 2.26 GHz Quad-Core Intel Xeon CPU: 8-core
24 GB RAM Upgradeable
DIMM 1
4 GB DDR3 ECC 1066 MHz ok
DIMM 2
4 GB DDR3 ECC 1066 MHz ok
DIMM 3
2 GB DDR3 ECC 1066 MHz ok
DIMM 4
2 GB DDR3 ECC 1066 MHz ok
DIMM 5
4 GB DDR3 ECC 1066 MHz ok
DIMM 6
4 GB DDR3 ECC 1066 MHz ok
DIMM 7
2 GB DDR3 ECC 1066 MHz ok
DIMM 8
2 GB DDR3 ECC 1066 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en2: 802.11 a/b/g/n
Video Information: ℹ️
ATI Radeon HD 4870 - VRAM: 512 MB
AL2216W 1680 x 1050 @ 60 Hz
System Software: ℹ️
OS X 10.10.1 (14B25) - Uptime: 2:4:35
Disk Information: ℹ️
HL-DT-ST BD-RE WH12LS39
HL-DT-ST DVDRAM GH24NS90
SAMSUNG HD103SJ disk1 : (1 TB)
EFI (disk1s1) <not mounted> : 210 MB
OS 10.10.1 (disk1s2) / : 999.35 GB (410.30 GB free)
Recovery HD (disk1s3) <not mounted> [Recovery]: 650 MB
SAMSUNG HD103SJ disk2 : (1 TB)
EFI (disk2s1) <not mounted> : 210 MB
Extra Storage (disk2s2) /Volumes/Extra Storage : 999.86 GB (554.20 GB free)
SAMSUNG HD103SJ disk3 : (1 TB)
EFI (disk3s1) <not mounted> : 210 MB
Extra Storage 2 - Scratch (disk3s2) /Volumes/Extra Storage 2 - Scratch : 999.86 GB (39.54 GB free)
WDC WD5001AALS-00LWTA0 disk0 : (500.11 GB)
EFI (disk0s1) <not mounted> : 210 MB
BOOTCAMP (disk0s2) /Volumes/BOOTCAMP : 499.90 GB (275.71 GB free)
USB Information: ℹ️
Shuttle Technology Inc. E-USB Bridge
Sony C6606
Apple, Inc. Keyboard Hub
Apple Inc. Apple Keyboard
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Firewire Information: ℹ️
Apple Computer, Inc. iSight 200mbit - 400mbit max
Gatekeeper: ℹ️
Anywhere
Kernel Extensions: ℹ️
/Applications/Hotspot Shield.app
[not loaded] com.anchorfree.tun (1.0) [Support]
/Applications/Parallels Desktop.app
[not loaded] com.parallels.kext.hidhook (9.0 24251.1052177) [Support]
[not loaded] com.parallels.kext.hypervisor (9.0 24251.1052177) [Support]
[not loaded] com.parallels.kext.netbridge (9.0 24251.1052177) [Support]
[not loaded] com.parallels.kext.usbconnect (9.0 24251.1052177) [Support]
[not loaded] com.parallels.kext.vnic (9.0 24251.1052177) [Support]
/Applications/TechTool Deluxe.app
[not loaded] com.micromat.iokit.ttpatadriver (5.0.0) [Support]
[not loaded] com.micromat.iokit.ttpfwdriver (5.0.0) [Support]
/Applications/TechTool Protogo/Protogo Applications/TechTool Pro 7.app
[not loaded] com.micromat.driver.spdKernel (1 - SDK 10.8) [Support]
[not loaded] com.micromat.driver.spdKernel-10-8 (1 - SDK 10.8) [Support]
/Applications/Temperature Monitor 4.94/Temperature Monitor 4.94.app
[not loaded] com.bresink.driver.BRESINKx86Monitoring (8.0) [Support]
/Applications/Toast 11 Titanium/Spin Doctor.app
[not loaded] com.hzsystems.terminus.driver (4) [Support]
/Applications/Toast 7 Titanium/Toast Titanium.app
[not loaded] com.roxio.TDIXController (1.6) [Support]
/Library/Extensions
[loaded] at.obdev.nke.LittleSnitch (4216 - SDK 10.8) [Support]
/System/Library/Extensions
[loaded] com.SiliconImage.driver.Si3132 (1.2.5) [Support]
[not loaded] com.devguru.driver.SamsungComposite (1.2.63 - SDK 10.6) [Support]
[not loaded] com.microsoft.driver.MicrosoftMouse (8.2) [Support]
[not loaded] com.roxio.BluRaySupport (1.1.6) [Support]
/System/Library/Extensions/MicrosoftMouse.kext/Contents/PlugIns
[not loaded] com.microsoft.driver.MicrosoftMouseBluetooth (8.2) [Support]
[not loaded] com.microsoft.driver.MicrosoftMouseUSB (8.2) [Support]
/System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
[not loaded] com.devguru.driver.SamsungACMControl (1.2.63 - SDK 10.6) [Support]
[not loaded] com.devguru.driver.SamsungACMData (1.2.63 - SDK 10.6) [Support]
[not loaded] com.devguru.driver.SamsungMTP (1.2.63 - SDK 10.5) [Support]
[not loaded] com.devguru.driver.SamsungSerial (1.2.63 - SDK 10.6) [Support]
Startup Items: ℹ️
HP IO: Path: /Library/StartupItems/HP IO
SiCoreService: Path: /Library/StartupItems/SiCoreService
Startup items are obsolete in OS X Yosemite
Launch Agents: ℹ️
[running] at.obdev.LittleSnitchUIAgent.plist [Support]
[loaded] com.coupons.coupond.plist [Support]
[running] com.micromat.TechToolProAgent.plist [Support]
[loaded] com.oracle.java.Java-Updater.plist [Support]
[invalid?] com.parallels.mobile.prl_deskctl_agent.launchagent.plist [Support]
[invalid?] com.parallels.mobile.startgui.launchagent.plist [Support]
[not loaded] com.teamviewer.teamviewer.plist [Support]
[not loaded] com.teamviewer.teamviewer_desktop.plist [Support]
Launch Daemons: ℹ️
[running] at.obdev.littlesnitchd.plist [Support]
[loaded] com.adobe.fpsaud.plist [Support]
[loaded] com.bombich.ccc.plist [Support]
[loaded] com.hp.lightscribe.plist [Support]
[running] com.micromat.TechToolProDaemon.plist [Support]
[loaded] com.microsoft.office.licensing.helper.plist [Support]
[loaded] com.oracle.java.Helper-Tool.plist [Support]
[invalid?] com.parallels.mobile.dispatcher.launchdaemon.plist [Support]
[failed] com.parallels.mobile.kextloader.launchdaemon.plist [Support] [Details]
[not loaded] com.teamviewer.teamviewer_service.plist [Support]
User Launch Agents: ℹ️
[loaded] com.facebook.videochat.[redacted].plist [Support]
[loaded] com.google.keystone.agent.plist [Support]
[running] com.nchsoftware.expressinvoice.agent.plist [Support]
[loaded] uk.co.markallan.clamxav.clamscan.plist [Support]
[loaded] uk.co.markallan.clamxav.freshclam.plist [Support]
User Login Items: ℹ️
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
SMARTReporter Application (/Applications/SMARTReporter/SMARTReporter.app)
BetterSnapTool Application (/Applications/BetterSnapTool.app)
smcFanControl Application (/Applications/smcfancontrol_2_2_2/smcFanControl.app)
Android File Transfer Agent Application (/Users/[redacted]/Library/Application Support/Google/Android File Transfer/Android File Transfer Agent.app)
Internet Plug-ins: ℹ️
JavaAppletPlugin: Version: Java 8 Update 25 Check version
FlashPlayer-10.6: Version: 16.0.0.235 - SDK 10.6 [Support]
Default Browser: Version: 600 - SDK 10.10
AdobePDFViewerNPAPI: Version: 11.0.06 - SDK 10.6 [Support]
CouponPrinter-FireFox_v2: Version: 5.0.3 - SDK 10.6 [Support]
AdobePDFViewer: Version: 11.0.06 - SDK 10.6 [Support]
Flash Player: Version: 16.0.0.235 - SDK 10.6 [Support]
QuickTime Plugin: Version: 7.7.3
SharePointBrowserPlugin: Version: 14.4.6 - SDK 10.6 [Support]
iPhotoPhotocast: Version: 7.0 - SDK 10.8
Safari Extensions: ℹ️
AdBlock [Installed]
F.B. Purity - Cleans Up Facebook [Installed]
OpenIE [Installed]
3rd Party Preference Panes: ℹ️
Déjà Vu [Support]
Flash Player [Support]
FUSE for OS X (OSXFUSE) [Support]
Java [Support]
MacFUSE [Support]
MenuMeters [Support]
Microsoft Mouse [Support]
MouseLocator [Support]
NTFS-3G [Support]
TechTool Protection [Support]
Time Machine: ℹ️
Time Machine not configured!
Top Processes by CPU: ℹ️
48% plugin-container
39% fontd
6% firefox
5% WindowServer
4% bluetoothaudiod
Top Processes by Memory: ℹ️
928 MB firefox
412 MB plugin-container
258 MB mds_stores
180 MB iTunes
129 MB Finder
Virtual Memory Information: ℹ️
19.38 GB Free RAM
3.11 GB Active RAM
1.88 GB Inactive RAM
1.38 GB Wired RAM
2.40 GB Page-ins
0 B Page-outs
Diagnostics Information: ℹ️
Jan 9, 2015, 07:16:57 PM Self test - passed
Jan 8, 2015, 11:37:48 AM /Library/Logs/DiagnosticReports/ClamXav_2015-01-08-113748_[redacted].cpu_resour ce.diag [Details]
Jan 8, 2015, 11:21:46 AM /Users/[redacted]/Library/Logs/DiagnosticReports/Preview_2015-01-08-112146_[red acted].crash -
How can I address a memory leak problem with Firefox?
I have happily used Firefox for the past 7 years, and have rarely had difficulties. However, I am having some trouble now; Firefox (running 3.6.6) seems to have a memory leak on my machine. It's slower than what was discussed in other forum posts, but it still scales up slowly to multiple hundred MBs of Memory with very little CPU usage.
I have tried disabling add-ons and extensions, but this does not stop the problem. I have cleared my cache and other stored data, but that also does not help. Has anyone experienced a similar problem that might be able to help?
== This happened ==
Every time Firefox opened
== within last two weeksHi reble0708,
I have Java console disabled on my Firefox browser.Everything is working fine for me. There maybe other problem on your browser which is making PDF document faded and blurry. Can you post the link where you found the problem viewing the PDF document?
Btw, you can go to ftp://ftp.mozilla.org/pub/firefox/releases/ and select the previous version of Firefox from the given options. There's no need to uninstall Firefox before you downgrade to the previous version of it.But before new installation, backup your Firefox profile folder.
edit: replaced random unofficial download site link. -
Hello, For the last couple of months, I am having issues with one of my tabs or the program itself causing a memory leak. I was hoping that subsequent releases would fix the problem, but when I downloaded V.11 it did not help.
I use tab mix plus and at any time, usually have about 25 tabs open. Everything functioned okay for 8 or so months up until recently.
I am wondering if there is a way to try to track down what is causing the leak. If it is one of my open pages, i will get rid of it. I tried opening one page at a time from scratch, but could not find the issue. .
I always have flash block enabled to cut down on the website junk.
using OSX firefox v11.Now, I'm not going to say it's an Add-On problem because from the research I've been doing on this problem for the last half hour shows that everyone has DIFFERENT add-ons, but everyone's having the SAME problem....
So I went through my add-ons and disabled them one by one, and the single add-on that has been giving me grief is the latest WOT add-on. So, I have Firefox 11 (so does my wife) and we both have the WOT add-on. But that's where the similarity ends... I have Windows 7 x64, she has Windows XP x86.... but she doesn't have the memory leak problem.
What I see is a sawtooth pattern over time. Memory goes up a little over 30+ seconds, then drops down. But over half an hour, the peaks of the sawtooth are larger, and it doesn't drop back down to the same level again - always a little more than before. And before you know it, FF is peaking at 1.5+GB, dropping down to 1.2GB... and FF is running very, very slowly.... excessive disk accesses (paging probably, though I apparently I still have 1.5 to 2.0 GB of free RAM). Killing FF frees it all up, and if I open FF again, it's back to using 250MB of RAM.
So, it's not the add-ons per se, but how they're interacting with FF (or the other way round).... most likely, it's this plug-in container they created to stop add-ons from taking FF with them when they crashed. Seems to have created more problems than it has solved..... would be great if you could choose not to use it.... -
Pro*c multithreaded application has memory leak
Hi there,
I posted this message a week ago in OCI section, nobody answer me.
I am really curious if my application has a bug or the pro*c has a bug.
Anyone can compile the sample code and test it easily.
I made multithreaded application which queries dynamic SQL, it works.
But the memory leaks when i query the SQL statement.
The more memory leaks, the more i query the SQL statement, even same SQL
statement.
I check it with top, shell command.
My machine is SUN E450, Solaris 8. Oracle 9.2.0.1
Compiler : gcc (GCC) 3.2.2
I changed source code which is from
$(ORACLE_HOME)/precomp/demo/proc/sample10.pc
the sample10 doesn't need to be multithreaded. But i think it has to work
correctly if i changed it to multithreaded application.
the make file and source code will be placed below.
I have to figure out the problem.
Please help
Thanks in advance,
the make file is below
HOME = /user/jkku
ORA = $(ORACLE_HOME)
CC = gcc
PROC = proc
LC_INCL = -I$(HOME)/work/dbmss/libs/include
lc_incl = include=$(HOME)/work/dbmss/libs/include
SYS_INCL =
sys_incl =
ORA_INCL = -I. \
-I$(ORA)/precomp/public \
-I$(ORA)/rdbms/public \
-I$(ORA)/rdbms/demo \
-I$(ORA)/rdbms/pbsql/public \
-I$(ORA)/network/public \
-DSLMXMX_ENABLE -DSLTS_ENABLE -D_SVID_GETTOD
INCLUDES = $(LC_INCL) $(SYS_INCL) $(ORA_INCL)
includes = $(lc_incl) $(sys_incl)
LC_LIBS =
SYS_LIBS = -lpthread -lsocket -lnsl -lrt
ORA_LIBS = -L$(ORA)/lib/ -lclntsh
LIBS = $(LC_LIBS) $(SYS_LIBS) $(ORA_LIBS)
# Define C Compiler flags
CFLAGS += -D_Solaris64_ -m64
CFLAGS += -g -D_REENTRANT
# Define pro*c Compiler flags
PROCFLAGS += THREADS=YES
PROCFLAGS += CPOOL=YES
# Our object files
PRECOMPS = sample10.c
OBJS = sample10.o
.SUFFIXES: .o .c .pc
.c.o:
$(CC) -c $(CFLAGS) $(INCLUDES) $*.c
.pc.c:
$(PROC) $(PROCFLAGS) $(includes) $*.pc $*.c
all: sample10
sample10: $(PRECOMPS) $(OBJS)
$(CC) $(CFLAGS) -o sample10 $(OBJS) $(LIBS)
clean:
rm -rf *.o sample10 sample10.c
the source code is below which i changed the oracle sample10.pc to
multithreaded application.
Sample Program 10: Dynamic SQL Method 4
This program connects you to ORACLE using your username and
password, then prompts you for a SQL statement. You can enter
any legal SQL statement. Use regular SQL syntax, not embedded SQL.
Your statement will be processed. If it is a query, the rows
fetched are displayed.
You can enter multi-line statements. The limit is 1023 characters.
This sample program only processes up to MAX_ITEMS bind variables and
MAX_ITEMS select-list items. MAX_ITEMS is #defined to be 40.
#include <stdio.h>
#include <string.h>
#include <setjmp.h>
#include <sqlda.h>
#include <stdlib.h>
#include <sqlcpr.h>
/* Maximum number of select-list items or bind variables. */
#define MAX_ITEMS 40
/* Maximum lengths of the names of the
select-list items or indicator variables. */
#define MAX_VNAME_LEN 30
#define MAX_INAME_LEN 30
#ifndef NULL
#define NULL 0
#endif
/* Prototypes */
#if defined(__STDC__)
void sql_error(void);
int oracle_connect(void);
int alloc_descriptors(int, int, int);
int get_dyn_statement(void);
void set_bind_variables(void);
void process_select_list(void);
void help(void);
#else
void sql_error(/*_ void _*/);
int oracle_connect(/*_ void _*/);
int alloc_descriptors(/*_ int, int, int _*/);
int get_dyn_statement(/* void _*/);
void set_bind_variables(/*_ void -*/);
void process_select_list(/*_ void _*/);
void help(/*_ void _*/);
#endif
char *dml_commands[] = {"SELECT", "select", "INSERT", "insert",
"UPDATE", "update", "DELETE", "delete"};
EXEC SQL INCLUDE sqlda;
EXEC SQL INCLUDE sqlca;
EXEC SQL BEGIN DECLARE SECTION;
char dyn_statement[1024];
EXEC SQL VAR dyn_statement IS STRING(1024);
EXEC SQL END DECLARE SECTION;
EXEC ORACLE OPTION (ORACA=YES);
EXEC ORACLE OPTION (RELEASE_CURSOR=YES);
SQLDA *bind_dp;
SQLDA *select_dp;
/* Define a buffer to hold longjmp state info. */
jmp_buf jmp_continue;
char *db_uid="dbmuser/dbmuser@dbmdb";
sql_context ctx;
int err_sql;
enum{
SQL_SUCC=0,
SQL_ERR,
SQL_NOTFOUND,
SQL_UNIQUE,
SQL_DISCONNECT,
SQL_NOTNULL
int main()
int i;
EXEC SQL ENABLE THREADS;
EXEC SQL WHENEVER SQLERROR DO sql_error();
EXEC SQL WHENEVER NOT FOUND DO sql_not_found();
/* Connect to the database. */
if (connect_database() < 0)
exit(1);
EXEC SQL CONTEXT USE :ctx;
/* Process SQL statements. */
for (;;)
/* Allocate memory for the select and bind descriptors. */
if (alloc_descriptors(MAX_ITEMS, MAX_VNAME_LEN, NAME_LEN) != 0)
exit(1);
(void) setjmp(jmp_continue);
/* Get the statement. Break on "exit". */
if (get_dyn_statement() != 0)
break;
EXEC SQL PREPARE S FROM :dyn_statement;
EXEC SQL DECLARE C CURSOR FOR S;
/* Set the bind variables for any placeholders in the
SQL statement. */
set_bind_variables();
/* Open the cursor and execute the statement.
* If the statement is not a query (SELECT), the
* statement processing is completed after the
* OPEN.
EXEC SQL OPEN C USING DESCRIPTOR bind_dp;
/* Call the function that processes the select-list.
* If the statement is not a query, this function
* just returns, doing nothing.
process_select_list();
/* Tell user how many rows processed. */
for (i = 0; i < 8; i++)
if (strncmp(dyn_statement, dml_commands, 6) == 0)
printf("\n\n%d row%c processed.\n", sqlca.sqlerrd[2], sqlca.sqlerrd[2] == 1 ? '\0' : 's');
break;
/* Close the cursor. */
EXEC SQL CLOSE C;
/* When done, free the memory allocated for pointers in the bind and
select descriptors. */
for (i = 0; i < MAX_ITEMS; i++)
if (bind_dp->V != (char *) 0)
free(bind_dp->V);
free(bind_dp->I); /* MAX_ITEMS were allocated. */
if (select_dp->V != (char *) 0)
free(select_dp->V);
free(select_dp->I); /* MAX_ITEMS were allocated. */
/* Free space used by the descriptors themselves. */
SQLSQLDAFree(ctx, bind_dp);
SQLSQLDAFree(ctx, select_dp);
} /* end of for(;;) statement-processing loop */
disconnect_database();
EXEC SQL WHENEVER SQLERROR CONTINUE;
EXEC SQL COMMIT WORK RELEASE;
puts("\nHave a good day!\n");
return;
* Allocate the BIND and SELECT descriptors using sqlald().
* Also allocate the pointers to indicator variables
* in each descriptor. The pointers to the actual bind
* variables and the select-list items are realloc'ed in
* the set_bind_variables() or process_select_list()
* routines. This routine allocates 1 byte for select_dp->V
* and bind_dp->V, so the realloc will work correctly.
alloc_descriptors(size, max_vname_len, max_iname_len)
int size;
int max_vname_len;
int max_iname_len;
int i;
* The first sqlald parameter determines the maximum number of
* array elements in each variable in the descriptor. In
* other words, it determines the maximum number of bind
* variables or select-list items in the SQL statement.
* The second parameter determines the maximum length of
* strings used to hold the names of select-list items
* or placeholders. The maximum length of column
* names in ORACLE is 30, but you can allocate more or less
* as needed.
* The third parameter determines the maximum length of
* strings used to hold the names of any indicator
* variables. To follow ORACLE standards, the maximum
* length of these should be 30. But, you can allocate
* more or less as needed.
if ((bind_dp =
SQLSQLDAAlloc(ctx, size, max_vname_len, max_iname_len)) ==
(SQLDA *) 0)
fprintf(stderr,
"Cannot allocate memory for bind descriptor.");
return -1; /* Have to exit in this case. */
if ((select_dp =
SQLSQLDAAlloc(ctx, size, max_vname_len, max_iname_len)) == (SQLDA *)
0)
fprintf(stderr,
"Cannot allocate memory for select descriptor.");
return -1;
select_dp->N = MAX_ITEMS;
/* Allocate the pointers to the indicator variables, and the
actual data. */
for (i = 0; i < MAX_ITEMS; i++) {
bind_dp->I = (short *) malloc(sizeof (short));
select_dp->I = (short *) malloc(sizeof(short));
bind_dp->V = (char *) malloc(1);
select_dp->V = (char *) malloc(1);
return 0;
int get_dyn_statement()
char *cp, linebuf[256];
int iter, plsql;
for (plsql = 0, iter = 1; ;)
if (iter == 1)
printf("\nSQL> ");
dyn_statement[0] = '\0';
fgets(linebuf, sizeof linebuf, stdin);
cp = strrchr(linebuf, '\n');
if (cp && cp != linebuf)
*cp = ' ';
else if (cp == linebuf)
continue;
if ((strncmp(linebuf, "EXIT", 4) == 0) ||
(strncmp(linebuf, "exit", 4) == 0))
return -1;
else if (linebuf[0] == '?' ||
(strncmp(linebuf, "HELP", 4) == 0) ||
(strncmp(linebuf, "help", 4) == 0))
help();
iter = 1;
continue;
if (strstr(linebuf, "BEGIN") ||
(strstr(linebuf, "begin")))
plsql = 1;
strcat(dyn_statement, linebuf);
if ((plsql && (cp = strrchr(dyn_statement, '/'))) ||
(!plsql && (cp = strrchr(dyn_statement, ';'))))
*cp = '\0';
break;
else
iter++;
printf("%3d ", iter);
return 0;
void set_bind_variables()
int i, n;
char bind_var[64];
/* Describe any bind variables (input host variables) */
EXEC SQL WHENEVER SQLERROR DO sql_error();
bind_dp->N = MAX_ITEMS; /* Initialize count of array elements. */
EXEC SQL DESCRIBE BIND VARIABLES FOR S INTO bind_dp;
/* If F is negative, there were more bind variables
than originally allocated by sqlald(). */
if (bind_dp->F < 0)
printf ("\nToo many bind variables (%d), maximum is %d\n.",
-bind_dp->F, MAX_ITEMS);
return;
/* Set the maximum number of array elements in the
descriptor to the number found. */
bind_dp->N = bind_dp->F;
/* Get the value of each bind variable as a
* character string.
* C contains the length of the bind variable
* name used in the SQL statement.
* S contains the actual name of the bind variable
* used in the SQL statement.
* L will contain the length of the data value
* entered.
* V will contain the address of the data value
* entered.
* T is always set to 1 because in this sample program
* data values for all bind variables are entered
* as character strings.
* ORACLE converts to the table value from CHAR.
* I will point to the indicator value, which is
* set to -1 when the bind variable value is "null".
for (i = 0; i < bind_dp->F; i++)
printf ("\nEnter value for bind variable %.*s: ",
(int)bind_dp->C, bind_dp->S);
fgets(bind_var, sizeof bind_var, stdin);
/* Get length and remove the new line character. */
n = strlen(bind_var) - 1;
/* Set it in the descriptor. */
bind_dp->L = n;
/* (re-)allocate the buffer for the value.
sqlald() reserves a pointer location for
V but does not allocate the full space for
the pointer. */
bind_dp->V = (char *) realloc(bind_dp->V, (bind_dp->L + 1));
/* And copy it in. */
strncpy(bind_dp->V, bind_var, n);
/* Set the indicator variable's value. */
if ((strncmp(bind_dp->V, "NULL", 4) == 0) ||
(strncmp(bind_dp->V, "null", 4) == 0))
*bind_dp->I = -1;
else
*bind_dp->I = 0;
/* Set the bind datatype to 1 for CHAR. */
bind_dp->T = 1;
return;
void process_select_list()
int i, null_ok, precision, scale;
if ((strncmp(dyn_statement, "SELECT", 6) != 0) &&
(strncmp(dyn_statement, "select", 6) != 0))
select_dp->F = 0;
return;
/* If the SQL statement is a SELECT, describe the
select-list items. The DESCRIBE function returns
their names, datatypes, lengths (including precision
and scale), and NULL/NOT NULL statuses. */
select_dp->N = MAX_ITEMS;
EXEC SQL DESCRIBE SELECT LIST FOR S INTO select_dp;
/* If F is negative, there were more select-list
items than originally allocated by sqlald(). */
if (select_dp->F < 0)
printf ("\nToo many select-list items (%d), maximum is %d\n",
-(select_dp->F), MAX_ITEMS);
return;
/* Set the maximum number of array elements in the
descriptor to the number found. */
select_dp->N = select_dp->F;
/* Allocate storage for each select-list item.
sqlprc() is used to extract precision and scale
from the length (select_dp->L).
sqlnul() is used to reset the high-order bit of
the datatype and to check whether the column
is NOT NULL.
CHAR datatypes have length, but zero precision and
scale. The length is defined at CREATE time.
NUMBER datatypes have precision and scale only if
defined at CREATE time. If the column
definition was just NUMBER, the precision
and scale are zero, and you must allocate
the required maximum length.
DATE datatypes return a length of 7 if the default
format is used. This should be increased to
9 to store the actual date character string.
If you use the TO_CHAR function, the maximum
length could be 75, but will probably be less
(you can see the effects of this in SQL*Plus).
ROWID datatype always returns a fixed length of 18 if
coerced to CHAR.
LONG and
LONG RAW datatypes return a length of 0 (zero),
so you need to set a maximum. In this example,
it is 240 characters.
printf ("\n");
for (i = 0; i < select_dp->F; i++)
char title[MAX_VNAME_LEN];
/* Turn off high-order bit of datatype (in this example,
it does not matter if the column is NOT NULL). */
sqlnul ((unsigned short *)&(select_dp->T), (unsigned short
*)&(select_dp->T), &null_ok);
switch (select_dp->T)
case 1 : /* CHAR datatype: no change in length
needed, except possibly for TO_CHAR
conversions (not handled here). */
break;
case 2 : /* NUMBER datatype: use sqlprc() to
extract precision and scale. */
sqlprc ((unsigned int *)&(select_dp->L), &precision,
&scale);
/* Allow for maximum size of NUMBER. */
if (precision == 0) precision = 40;
/* Also allow for decimal point and
possible sign. */
/* convert NUMBER datatype to FLOAT if scale > 0,
INT otherwise. */
if (scale > 0)
select_dp->L = sizeof(float);
else
select_dp->L = sizeof(int);
break;
case 8 : /* LONG datatype */
select_dp->L = 240;
break;
case 11 : /* ROWID datatype */
case 104 : /* Universal ROWID datatype */
select_dp->L = 18;
break;
case 12 : /* DATE datatype */
select_dp->L = 9;
break;
case 23 : /* RAW datatype */
break;
case 24 : /* LONG RAW datatype */
select_dp->L = 240;
break;
/* Allocate space for the select-list data values.
sqlald() reserves a pointer location for
V but does not allocate the full space for
the pointer. */
if (select_dp->T != 2)
select_dp->V = (char *) realloc(select_dp->V,
select_dp->L + 1);
else
select_dp->V = (char *) realloc(select_dp->V,
select_dp->L);
/* Print column headings, right-justifying number
column headings. */
/* Copy to temporary buffer in case name is null-terminated */
memset(title, ' ', MAX_VNAME_LEN);
strncpy(title, select_dp->S, select_dp->C);
if (select_dp->T == 2)
if (scale > 0)
printf ("%.*s ", select_dp->L+3, title);
else
printf ("%.*s ", select_dp->L, title);
else
printf("%-.*s ", select_dp->L, title);
/* Coerce ALL datatypes except for LONG RAW and NUMBER to
character. */
if (select_dp->T != 24 && select_dp->T != 2)
select_dp->T = 1;
/* Coerce the datatypes of NUMBERs to float or int depending on
the scale. */
if (select_dp->T == 2)
if (scale > 0)
select_dp->T = 4; /* float */
else
select_dp->T = 3; /* int */
printf ("\n\n");
/* FETCH each row selected and print the column values. */
EXEC SQL WHENEVER NOT FOUND GOTO end_select_loop;
for (;;)
EXEC SQL FETCH C USING DESCRIPTOR select_dp;
/* Since each variable returned has been coerced to a
character string, int, or float very little processing
is required here. This routine just prints out the
values on the terminal. */
for (i = 0; i < select_dp->F; i++)
if (*select_dp->I < 0)
if (select_dp->T == 4)
printf ("%-*c ",(int)select_dp->L+3, ' ');
else
printf ("%-*c ",(int)select_dp->L, ' ');
else
if (select_dp->T == 3) /* int datatype */
printf ("%*d ", (int)select_dp->L,
*(int *)select_dp->V);
else if (select_dp->T == 4) /* float datatype */
printf ("%*.2f ", (int)select_dp->L,
*(float *)select_dp->V);
else /* character string */
printf ("%-*.*s ", (int)select_dp->L,
(int)select_dp->L, select_dp->V);
printf ("\n");
end_select_loop:
return;
void help()
puts("\n\nEnter a SQL statement or a PL/SQL block at the SQL> prompt.");
puts("Statements can be continued over several lines, except");
puts("within string literals.");
puts("Terminate a SQL statement with a semicolon.");
puts("Terminate a PL/SQL block (which can contain embedded
semicolons)");
puts("with a slash (/).");
puts("Typing \"exit\" (no semicolon needed) exits the program.");
puts("You typed \"?\" or \"help\" to get this message.\n\n");
int connect_database()
err_sql = SQL_SUCC;
EXEC SQL WHENEVER SQLERROR DO sql_error();
EXEC SQL WHENEVER NOT FOUND DO sql_not_found();
EXEC SQL CONTEXT ALLOCATE :ctx;
EXEC SQL CONTEXT USE :ctx;
EXEC SQL CONNECT :db_uid;
if(err_sql != SQL_SUCC){
printf("err => connect database(ctx:%ld, uid:%s) failed!\n", ctx, db_uid);
return -1;
return 1;
int disconnect_database()
err_sql = SQL_SUCC;
EXEC SQL WHENEVER SQLERROR DO sql_error();
EXEC SQL WHENEVER NOT FOUND DO sql_not_found();
EXEC SQL CONTEXT USE :ctx;
EXEC SQL COMMIT WORK RELEASE;
EXEC SQL CONTEXT FREE:ctx;
return 1;
void sql_error()
printf("err => %.*s", sqlca.sqlerrm.sqlerrml, sqlca.sqlerrm.sqlerrmc);
printf("in \"%.*s...\'\n", oraca.orastxt.orastxtl, oraca.orastxt.orastxtc);
printf("on line %d of %.*s.\n\n", oraca.oraslnr, oraca.orasfnm.orasfnml,
oraca.orasfnm.orasfnmc);
switch(sqlca.sqlcode) {
case -1: /* unique constraint violated */
err_sql = SQL_UNIQUE;
break;
case -1012: /* not logged on */
case -1089:
case -3133:
case -1041:
case -3114:
case -3113:
/* �6�Ŭ�� shutdown�ǰų� �α��� ���°� �ƴҶ� ��b�� �õ� */
/* immediate shutdown in progress - no operations are permitted */
/* end-of-file on communication channel */
/* internal error. hostdef extension doesn't exist */
err_sql = SQL_DISCONNECT;
break;
case -1400:
err_sql = SQL_NOTNULL;
break;
default:
err_sql = SQL_ERR;
break;
EXEC SQL CONTEXT USE :ctx;
EXEC SQL WHENEVER SQLERROR CONTINUE;
EXEC SQL ROLLBACK WORK;
void sql_not_found()
err_sql = SQL_NOTFOUND;Hi Jane,
What version of Berkeley DB XML are you using?
What is your operating system and your hardware platform?
For how long have been the application running?
What is your current container size?
What's set for EnvironmentConfig.setThreaded?
Do you know if containers have previously not been closed correctly?
Can you please post the entire error output?
What's the JDK version, 1.4 or 1.5?
Thanks,
Bogdan -
DataSocket memory leak problem (2VO0SF00) -- more info?
When upgrading to LabVIEW 8.5 recently, I noticed the following known issue in the readme file:
"ID: 2VO0SF00
DataSocket/OPC Leaks Memory using ActiveX VIs to perform open-write-close repeatedly
If you call the DataSocket Open, DataSocket Write, and DataSocket Close functions in succession repeatedly, LabVIEW leaks memory. Workaround — To correct this problem, call the DataSocket Open function once, use the DataSocket Write function to write multiple times, and then use the DataSocket Close function."
Looking back, I think this problem may have been present in previous LabVIEW releases as well, and might be giving rise to a problem that's been dogging me for quite some time (see my thread, "Error 66 with DataSockets", http://forums.ni.com/ni/board/message?board.id=170&thread.id=187206), in addition to general slow/glitchy behaviour when my VI's have been running continuously for a long time. But in order to determine whether or not this issue affects me, and how I should go about fixing it in the context of my own programs, I need a bit more information about the nature of the issue itself and the inner workings of the DataSocket VI's. Any help or insight the community can provide into this would be greatly appreciated!
Here are my questions:
It is my understanding from the "known issue" description above that the memory leak happens when you have a DS Open wired to a DS Write wired to a DS Close, all inside a loop (example 1), and that the suggested workaround would be to move the DS Open and DS Close functions out of the loop on opposite sides, wired to the DS Write which remains inside the loop (example 2). Is this correct?
Does this leak also happen when performing DS open-read-close's repeatedly (example 3)?
What happens when a DS Write (or DS Read) is called without a corresponding DS Open and DS Close (examples 4a and 4b)? Does it implicitly do a DS open before doing the write operation and a DS close afterwards? What I'm getting at is this: would having an isolated DS Write (or DS Read) inside a loop, not connected to any DS Open or DS Close functions at all, cause this same memory leak?
If one computer is running the DS server and a second computer is running the VI with the repeated open-write-close's, on which computer does the memory leak occur?
In my question #1 workaround (example 2), the DS Open and DS Close outside the loop are routed through a shift register and in to and out of the DS Write inside the loop. If the DS connection id goes into the DS Write "connection in" and then splits and goes around the DS Write and out to the DS Close, without coming out of the DS Write "connection out" (example 5), will the memory leak still be avoided? I.e. if the DS Write function doesn't have anything connected to its "connection out", will it try to do an implicit DS Close?
If the VI causing the memory leak is stopped, but LabVIEW stays running, will the leaked memory be reclaimed? What if the VI is closed? What if all of LabVIEW is closed?
FYI, in the examples above "x1a" is a statically-defined DataSocket on the DS server running on the computer Max, to which the computer running the example VI's has read/write access. My actual application has numerous VI's and hundreds of DataSocket items, many of which are written to / read from every 50-100 ms in the style of examples 4a and 4b.
Does anyone have any idea about this stuff?
Thanks in advance,
Patrick
Attachments:
examples_jpg1.zip 63 KB
examples_vi1.zip 40 KBHi Meghan,
Yes, some of the larger VIs in my application do write to / read from several hundred DataSockets, so it's not feasible to use shift registers for each one individually, and hence why I'm passing the references into an array, etc.
Your Alternate Solution 2 is more along the lines of something that would work for me. However, my actual code has a lot of nested loops, sequences and DataSocket items which are not all written to in the same frame, so this solution would still be difficult to implement: it would be cumbersome to unpack the entire 500-element reference id array and build a new one (maintaining the positions and values of the unaffected elements) every time I write to some small subset of the DataSockets.
I think I have a solution which solves the problem and is also scalable to the size of my application -- I've attached it as Example 7. Do you think this will avoid the memory leak? It's the same as your Alternate Solution 2, except that instead of building a new array out of the DS Write reference outs, each reference out replaces the appropriate element of the original array.
If I understand you correctly, in order to avoid implicit reference opens and closes, a DS Write needs to have both it's reference in and reference out wired to something. Thus, even though my Example 7 replaces an element of the array with an identical value, and therefore doesn't actually change the array (which would be a silly thing to do normally), the DS Writes have their reference outs wired to something, and eventually in a convoluted way to a DS Close, so it should avoid the memory leak.
Just out of curiosity (I don't think anything like this would apply to my application or any fixes I implement), when would the implicit reference close happen in the attached Example 8? The DS Write has its reference in and reference out both connected to temporally "adjacent" DS Writes via the shift register, so perhaps it wouldn't try to close the reference on each loop iteration? Or would it look into the future and see that there is no DS Close and decide to implicitly do that itself? Or maybe only the DS Write on the last loop iteration does this?
Thanks for bearing with me through this,
Patrick
Attachments:
example73.JPG 40 KB
example83.JPG 14 KB
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