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  • Remote application monitoring through Visual GC

    - by Poole
    I am trying to monitor an application available on remote machine using VisualVM & Visual GC. I have enabled the jmxremote on the remote side as follows: -Dcom.sun.management.jmxremote, -Dcom.sun.management.jmxremote.port=8888, -Dcom.sun.management.jmxremote.ssl=false, -Dcom.sun.management.jmxremote.authenticate=false While monitoring through VisualVM, everything runs fine but VisualGC doesn't displays any stats (getting Not Supported for this JVM error). While tried to monitor one local application, VisualGC runs fine... Got success with the remote app once started jstad on the remote jvm. Is this a known issue with VisualGC...? Remote JVM - 1.5 Local JVM - 1.6

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  • Stop windows 7 disk thrashing when idle

    - by Konrads
    Hello, I installed Windows 7 on VMWare and it works just fine! However, when I leave the machine idling and work on my host OS, Windows 7 decides that it is a good idea to thrash disk and kill performance. How do I disable these background processes? Is it just indexer?

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  • Database Mirroring Performance Monitoring

    Many people deploy performance monitoring solutions in a "one-size-fits-all" manner. That is, they tend to build a solution that can be easily deployed to multiple servers and capture basic information from each server. The trouble is that not every server is identical, not even within the same shop. For example, not every server may have database mirroring deployed, which means your performance monitoring solution may be missing some critical pieces of information with regards to monitoring database mirroring.

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  • Windows system monitoring and profiling

    - by Aris
    I have several dozen 64-bit Windows 2003 servers in a high performance environment with very bursty system utilization. I am looking for a tool (or tools) to monitor and analyze system performance (eg, CPU utilization, bandwidth, etc). This tool can either query servers from a central location (SNMP) or require installation of a component on each server. It should poll on a 1-second interval. It should be able to generate pretty graphs which show trends over time. As a nice-to-have, it should be able to send out emails or IMs when certain thresholds are exceeded. The tools I have investigated so far, including Solarwinds and PRTG, are not designed to poll this frequently. They seem to be designed for a ~30-second interval. Solarwinds wouldn't go lower than 3-sec, and PRTG chokes at 1-sec. They both default to 1-min. All three tools seem more focused on outage monitoring and reporting than metric collection. Given the bursty nature of our applications, such infrequent polling would result in a very inaccurate picture of performance. I am considering rolling my own solution using perfmon. This would be a lot of work, and seems like reinventing the wheel. Are there any tools out there that meet my needs?

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  • Monitor file selection in explorer (like clipboard monitoring) in C#

    - by Christian
    Hi, I am trying to create a little helper application, one scenario is "file duplication finder". What I want to do is this: I start my C# .NET app, it gives me an empty list. Start the normal windows explorer, select a file in some folder The C# app tells me stuff about this file (e.g. duplicates) How can I monitor the currently selected file in the "normal" windows explorer instance. Do I have to start the instance using .NET to have a handle of the process. Do I need a handle, or is there some "global hook" I can monitor inside C#. Its a little bit like monitoring the clipboard, but not exactly the same... Any help is appreciated (if you don't have code, just point me to the right interops, dlls or help pages :-) Thanks, Chris EDIT 1 (current source, thanks to Mattias) using SHDocVw; using Shell32; public static void ListExplorerWindows() { foreach (InternetExplorer ie in new ShellWindowsClass()) DebugExplorerInstance(ie); } public static void DebugExplorerInstance(InternetExplorer instance) { Debug.WriteLine("DebugExplorerInstance ".PadRight(30, '=')); Debug.WriteLine("FullName " + instance.FullName); Debug.WriteLine("AdressBar " + instance.AddressBar); var doc = instance.Document as IShellFolderViewDual ; if (doc != null) { Debug.WriteLine(doc.Folder.Title); foreach (FolderItem item in doc.SelectedItems()) { Debug.WriteLine(item.Path); } } }

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  • Testing for disk write

    - by Montecristo
    I'm writing an application for storing lots of images (size <5MB) on an ext3 filesystem, this is what I have for now. After some searching here on serverfault I have decided for a structure of directories like this: 000/000/000000001.jpg ... 236/519/236519107.jpg This structure will allow me to save up to 1'000'000'000 images as I'll store a max of 1'000 images in each leaf. I've created it, from a theoretical point of view seems ok to me (though I've no experience on this), but I want to find out what will happen when there will be directories full of files in there. A question about creating this structure: is it better to create it all in one go (takes approx 50 minutes on my pc) or should I create directories as they are needed? From a developer point of view I think the first option is better (no extra waiting time for the user), but from a sysadmin point of view, is this ok? I've thought I could do as if the filesystem is already under the running application, I'll make a script that will save images as fast as it can, monitoring things as follows: how much time does it take for an image to be saved when there is no or little space used? how does this change when the space starts to be used up? how much time does it take for an image to be read from a random leaf? Does this change a lot when there are lots of files? Does launching this command sync; echo 3 | sudo tee /proc/sys/vm/drop_caches has any sense at all? Is this the only thing I have to do to have a clean start if I want to start over again with my tests? Do you have any suggestions or corrections?

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  • Macbook Pro Hard Drive won't shop up on disk startup

    - by Kristal
    I have a macbook pro from 2007. It came with an installation CD for 10.4.8. The first problem is that it won't even recognize the installation CD even though the CD seems perfectly fine. So I used another installation CD just to get me to the Disc Utility dialogue box. I went through the steps to erase the hard drive. However when I attempted to reboot the machine using Disc Startup there was no option for me to select the hard drive. Of course, since I don't have the appropriate installation disk in it won't let me install anything. What are my options? Do I need to ask Apple to send me a new installation CD for this computer? And why wouldn't the hard drive show up in the Startup options?

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  • Hard Disk Space Changes

    - by Write.
    I am currently running on Windows 7 x64, and have observe that my hard disk space is acting a little weird. Currently, my harddisk has 3 partitions, C:, D:, E:. Previously, before I delete a huge folder (30gb of data) from my D: drive, my C: drive has about 1gb left, while my E: drive has about 5 gb left. After deleting the 30gb of data (from D: drive), my space in D: drive has been recovered (but not sure if it's fully recovered), my C: drive which only had about 1gb left increased to 3. While my E: drive which had 5gb left dropped to 1. I was wondering if it has something to do with the fragmentations and whatsoever I always hear about in harddisk. Has anyone encountered similar issues or have an explanation to why it could be happening?

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  • Automating Disk Cleanup on Windows using commands

    - by Ram
    Hi, I asked this question on MSDN forum but there was no response.. Maybe I had posted in the wrong forum... So I'm posting it again here, hoping that someone might be able to help me out here... I am trying to run Disk Cleanup in the command prompt (and through a C# program) and so I went through all the available options from this link : http://support.microsoft.com/kb/315246 While I am just trying to understand what I can do, it would be good if someone could explain why the drive option /d cannot be set while specifying /sagerun:n Or is it possible, by some way, to run /sagerun for a specific drive? Pls suggest... Thanks, Ram

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  • How to increase the disk cache of Windows 7

    - by Mark Christiaens
    Under Windows 7 (64 bit), I'm reading through 9000 moderately sized files. In total, there is more than 200 MB of data. Using Java (JDK 1.6.21) I'm iterating over the files. The first 1400 or so go at full speed but then speed drops off to 4ms per file. It turns out that the main cost is incurred simply by opening the files. I'm opening the files using new FileInputStream (and of course closing them in time to avoid file leaks). After some investigating, I see that Windows' disk cache is using only 100 MB or so of RAM although I have 8 GiB available. I've tried increasing the cache size using the CacheSet tool but any values I provide are considered out of range. I've also tried enabling the LargeSystemCache registry key but (after rebooting) the CacheSet tool still indicates I'm using 100 MB of cache (and doesn't increase during the test run). Does anybody have any suggestions to "encourage" Windows 7 to cache my 9000 files?

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  • Disk quota problem in Windows Server SBS 2003

    - by deddebme
    I have got a new job and the existing SBS 2003 domain setup is unsecure (i.e. everyone is a domain admin etc etc). There are lots of problem due to inexperienced "network admin", and I am trying to fix them one by one. There exist one issue which I found quite weird, that the "Quota" tab exists in the C:(NTFS) drive but not the D:(NTFS) drive. I played around with gpedit to enable disk quota (it was "not configured" before), but still I can't see that tab. Have you seen this problem before? How did you solve it?

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  • Disk space profiling in Unix

    - by user1677770
    I'm looking for a tool to summarize how disk space is being used on very large partitions. Our file system is around 950TB, mostly broken up into 20TB partitions. There are some really nice graphical tools for visualising these file spaces: http://www.disksavvy.com/disksavvy_screenshots.html http://methylblue.com/filelight/ But I'm really not sure how well they will scale. Does anybody have any experience of these tools and can make any recommendations? Even something that parses and summarises a really big du output would be a good start.

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  • Automating Disk Cleanup on Windows using commandline

    - by Ram
    I asked this question on the MSDN forums but there was no response. Maybe someone might be able to help me out here. I am trying to run Disk Cleanup in the command prompt (and through a C# program) and so I went through all the available options from this link: http://support.microsoft.com/kb/315246 While I am just trying to understand what I can do, it would be good if someone could explain why the drive option /d cannot be set while specifying /sagerun:n Or is it possible, by some way, to run /sagerun for a specific drive? Thanks.

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  • Disk quota problem in Windows Server SBS 2003

    - by deddebme
    I have got a new job and the existing SBS 2003 domain setup is unsecure (i.e. everyone is a domain admin etc etc). There are lots of problem due to inexperienced "network admin", and I am trying to fix them one by one. There exist one issue which I found quite weird, that the "Quota" tab exists in the C:(NTFS) drive but not the D:(NTFS) drive. I played around with gpedit to enable disk quota (it was "not configured" before), but still I can't see that tab. Have you seen this problem before? How did you solve it?

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  • Disk Utility Restore causes "Could not validate resource - Invalid Argument"

    - by Yahoo
    I have a problem with Disk Utility on Mac OS X 10.6. I have an image of Windows that I would like to use as a bootable volume on a pen drive or external hard drive. The thing is: When I try to restore the volume from the image I get an error: "Restore Failure: Could not validate resource - Invalid Argument" I read some information about that error on the Internet. I converted the image into .iso (Mac OS Extended/ISO (Joliet) Hybrid Image) format and then got this error: "Restore Failure: Could not find any scan information. The source image needs to be imagescanned before it can be restored." When I try to scan the image for Restore, I get the first message. I really read a lot of information about this topic on the Internet, but I haven't found the solution. I tried both ISO and DMG formats; I don't know which is best.

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  • Backup virtual hard disk

    - by Harshil Sharma
    I have a VM created in VMWare Player. It's VHD is currently sized 17 GB, split among multiple 2 GB files. The host OS is Windows 8. I use CrashPlan in host OS for file backup. The problem is, whenever I use the VM, CrashPlan detects all parth of VHD as altered and backs up the 17 GB VHD. WHat I want is a software that can run on host OS (Windows 8), treat the VHD as a physical hard disk and create incremental backups of the VHD, includeing all files, programs and the OS

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  • Xen Disk Performence Issues

    - by user98651
    I'm currently using Xen PV on CentOS 5 with my domU's as flat files running on a hardware RAID controlled (write cache enabled) formatted with XFS. On the dom0 I can get about 500MB/s in a 2GB dd write from /dev/zero however on the domU's I'm lucky if I get 10MB/s (it is usually around half that). I've tried changing the disk scheduling to NOOP on the domU's, changed some mount parameters and tweaked the performance allocations of both the dom0 (prioritize CPU) and domU's (increase RAM and VCPU allocations). None of these steps have produced any noticeable change in performance. My instinct here is that it is not a hardware problem, due to the solid performance of the dom0. Any ideas on what might be causing this problem? I'm considering moving to LVM based domU's.

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  • openSuse full disk encryption

    - by djechelon
    I'm a proud Suser. I'm about to reinstall 12.2 on my ASUS N76VZ (UEFI x64 laptop). Since I'm very sensitive about laptop security against theft or unwanted inspection, I chose to use BitLocker with USB dongle in Windows 7. When installing Suse the last time I found that only the home partition (separated from root) was capable of being encrypted. Does Suse offer a full disk encryption solution like BitLocker that I haven't discovered yet? Or is encrypting home partition the only way to protect data? Encrypting only home is feasible as one stores personal data in home, but I still would like to encrypt the whole thing! Also, using a hardware token (no TPM available) for unlocking is preferred to password, if possible! Thanks

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  • Is rsync --delete safe in case of disk failure

    - by enedene
    I have two data hard drives on my Linux server and I use second as a backup for a first drive. I use rsync for that purpose. An example would be: rsync -r -v --delete /media/disk1/ /media/disk2/ What this does is that it copies every file/directory from /media/disk1/ to /media/disk2/ but also deletes any difference. For example, lets say that files A and B but not file C are on disk1, and on disk2 there is no A and B files, but there is C. The result would be that after the command on disk2 I'd have files A and B, but file C would be deleted, just like on disk1. Now, a rather disastrous scenario had crossed my mind; what if disk1 dies, system continues to work since system files are on my system disk, but when rsync tries to backup my data on disk2 from broken disk1, it deletes all the files from disk2 because it can't read anything on disk1. Is this a possible scenario, or is there a protection from it build in rsync?

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  • How to increase the disk cache of Windows 7

    - by Mark Christiaens
    Under Windows 7 (64 bit), I'm reading through 9000 moderately sized files. In total, there is more than 200 MB of data. Using Java (JDK 1.6.21) I'm iterating over the files. The first 1400 or so go at full speed but then speed drops off to 4ms per file. It turns out that the main cost is incurred simply by opening the files. I'm opening the files using new FileInputStream (and of course closing them in time to avoid file leaks). After some investigating, I see that Windows' disk cache is using only 100 MB or so of RAM although I have 8 GiB available. I've tried increasing the cache size using the CacheSet tool but any values I provide are considered out of range. I've also tried enabling the LargeSystemCache registry key but (after rebooting) the CacheSet tool still indicates I'm using 100 MB of cache (and doesn't increase during the test run). Does anybody have any suggestions to "encourage" Windows 7 to cache my 9000 files?

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  • Skype Disk Full Error...

    - by commradepolski
    I have searched around online for an answer to this one without any luck. Every couple of days, on my PC I get an error with Skype, that says Disk Full. I have plenty of HD space so I know that is not the issue. I am able to resolve the problem temporarily by killing the skype process and restarting skype. Does anyone know of a solution to this problem to stop it from happening? I am running Skype 4.2.0.169.

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  • Can't find disk usage in one directory

    - by Xster
    Similar questions are asked frequently but no suggested answers solved my issue. I have some disk space usage that I can't find as well. In df Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 144183992 136857180 2652 100% / udev 2013316 4 2013312 1% /dev tmpfs 808848 876 807972 1% /run none 5120 0 5120 0% /run/lock none 2022116 76 2022040 1% /run/shm overflow 1024 0 1024 0% /tmp I checked the inodes, I checked lsof for +L1 or deleted files, I rebooted, I checked for files hidden behind mounts but none of them were the issue. It grows periodically and I'm running out of things to delete to feed the beast. It's all in the home directory of the only user I have. In du in ~ du -h --max-depth=1 192K ./.nv 2.1M ./.gconf 12K ./Pictures 1.6M ./.launchpadlib 12K ./Public 24K ./.TemporaryItems 8.9M ./.cache 12K ./Network Trash Folder 28K ./.vnc 11M ./.AppleDB 48K ./.subversion 1.9G ./.xbmc 8.0K ./.AppleDesktop 12K ./.dbus 81M ./.mozilla 12K ./Music 160K ./.gnome2 44K ./Downloads 692K ./.zsh 236K ./.AppleDouble 64K ./.pulse 4.0K ./.gvfs 1.4M ./.adobe 44K ./.pki 44K ./.compiz-1 168K ./.config 1.4M ./.thumbnails 12K ./Templates 912K ./.gstreamer-0.10 8.0K ./.emacs.d 92K ./Desktop 1.3M ./.local 12K ./Ubuntu One 12K ./Documents 296K ./.fontconfig 12K ./.qt 12K ./.gnome2_private 20K ./.ssh 20K ./.mission-control 12K ./Videos 12K ./Temporary Items 640K ./.macromedia 124G . I can't find a way to figure out how it got to that 124G in that directory. There are no mount points in home.

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