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  • Total RAM % from perfmon Windows Server 2008 R2

    - by Xaxum
    I am trying to find a good way to get available RAM percentage from perfmon. I can get Available Mbytes but I can't find any way to get the total installed memory on the server or what is in use via perfmon. I can obviously alert on GB but each of my servers have different total RAM so not a great alert. The way I understand % Committed Bytes is this includes page files on disk so this is not a good indicator. Any help would be appreciated.

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  • Allowing Apache in Ubuntu to access files in NTFS hard drive

    - by lyrae
    I have LAMP running in Ubuntu. However, my files are located on a separate NTFS hard drive (/media/shared/mysite/). going to http://localhost gives me a 403 how can i, securely, allow apache to read/write the NTFS disk? 'shared' is currently being mounted when system boots. here's the entry in fstab: /dev/sda1 /media/shared ntfs-3g quiet,defaults,locale=en_US.utf8,umask=000 0 0

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  • How to mount LUKS partition securely on server

    - by Ency
    I'm curious if it is possible to mount a partition encrypted by cryptsetup with LUKS securely and automatically on Ubuntu 10.0.4 LTS. For example, if I use the key for the encrypted partition, than that key has to be presented on a device that is not encrypted and if someone steals my disk they'll be able to find the key and decrypt the partition. Is there any safe way to mount an encrypted partition? If not, does anything exist to do what I want?

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  • How does data I/O takes place on USB Flash Memory ?

    - by user35704
    I want to know how is data I/O takes place on flash drives which are typically EEPROM's . I thought so as I was writing a C Program that involves file handling . For a normal HDD , that would involve returning the file pointer and reading or writing data to the disk which would be done by read/write HEAD . While in EEPROM's there is no read/write head , as it's works on mnemonic commands , So how come does the C file handling program works when I apply it to a file on flash drive ?

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  • centos freezes with this error kernel: ata1.00: exception Emask 0x0 SAct 0x7fffffff SErr 0x0 action 0x0

    - by lakshman
    0 down vote favorite share [fb] share [tw] I am using centOs 5.5 version with raid 1 configuration the server freezes and goes to non response . the only thing i found on messages file is kernel: ata1.00: exception Emask 0x0 SAct 0x7fffffff SErr 0x0 action 0x0 The server is built recently Please let us know what is the problem the hard disk details are Model Number: ST500NM0011 Serial Number: Z1M02LT7 Firmware Revision: SN02

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  • "Upgrading" SQL Server 2008 180-day Evaluation to Licenced Standard Edition

    - by alsan
    Hello, I run into the same issue as someone who posted this question on experts-exchange.com (couldn't read the answer though as I don't have an account there): {Quote Begin} I noticed that the 180-day Evaluation version of SQL Server 2008 is the Enterprise version. Is there going to be any problem "upgrading" the Evaluation Enterprise version to a licensed STANDARD version (and how much additional stuff is going to be left inactive on my disk and, more importantly, in my registry, etc. if I do so)? {Quote End} Any advice is appreciated.

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  • How to monitor an Amazon EC2 instance

    - by sektor
    Is there a way to monitor ec2 instances without using cloudwatch? I ask this since ec2 instances are basically VPS's, and using output from commands like top, vmstat, htop in scripts may not give the clear picture as the CPU cycles are shared between other instances as well. What should one keep in mind while monitoring CPU usage on a VPS?, should one have alerts based on top load or % of CPU used by user processes coupled with other factors like processes waiting on disk io, hardware interrupts?

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  • Using SSH, transfer webURL to remote machine

    - by AlanTuring
    Hi so i was doing some research in the library so i could use some pictures later on my Desktop computer in my room. I have space on my Lab account which i usually SSH into, and i was wondering if URL's can be directly transferred over to a remote machine and saved on the hard disk. I was thinking something like this: scp http://click.si.edu/images/truncatedurl.jpg /home3/etc.../filename.jpg is this possible? Thanks in advance.

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  • few questions on clone zilla

    - by user23950
    I'm trying to clone my windows xp installation. If I back it up using clone zilla and the my xp machine is infected by virus/spyware would I also be bringing the whole mess when I try to back it up. Do I need the whole partition/ whole disk if I use an external hard drive to backup. Would the data be formatted on the partition that I choose?

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  • Boot win7 from laptop after booting win 8 to go from usb

    - by user1687031
    Just successfully installed and ran windows 8 to go on an external usb hdd. After shutdown and removing the usb hard disk, tried to start my laptop which has a single windows 7 system, but failed to boot and even repair trials didn't succeed. It seems that win 8 affected the strucure of the laptop hard drive which results in corruption in its main win 7 partition. How to fix that and avoid future problems of the same type? thanks.

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  • New harddrives failing within weeks.

    - by Jason Kealey
    I've experienced 8 hard disk failures in 3 months and have tried many things to solve the issue permanently but I have failed. I would like to know if you have any advice for me. System was running Win XP on an Asus P5W-DH Deluxe. I have setup a RAID-1 array. I started out with 2 x 500 GB 7200RPM Western Digital drives. One died. I took it out to RMA it. On the same day, the router was fried. Assumed a power surge occurred; connected an older UPS to protect the system. Once I got my hands on an identical disk, I installed it. The RAID array was rebuilt. A few days later, the other one died. Assumed the rebuild caused it to fail. Took it out for RMA. Before the other one arrived, the remaining one died. I then discovered I could re-enable them using the Intel Matrix Storage Manager. I re-enabled both and the system seemed fine for a week, until both died again. I got two new 1.5 TB 7200RPM Seagate drives and re-installed Windows 7. Also replaced the UPS and power supply. They both died again. The voltage on the plug is stable between 120 and 122V as per the UPS. None of the other devices have had any problems (monitors, etc.). At this point, I see two options: a) electrical issue in the house that was, for some reason, not blocked by the UPS. b) something else inside the system causing surges? motherboard? onboard raid controller? Failures happen fairly quickly, between 2 and 14 days after I fix the previous issue. I just gotten a new computer (Core i7) to replace it. If it is stable, I can determine that b) was the problem. If it fries its hard drive again, I can determine that it is an electrical issue in the house. Do you have any other thoughts? Any tools I can run on the drives that failed to get more information about the original SMART event history?

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  • slow startup of event viewer on windows 7 but fast on server 2008

    - by Tim
    Hi, Since switching to Windows 7 for my desktop I've started to get really p***ed off at the length of time it takes to start the event viewer to display the application event log (typically 20-30 secs or disk griding - presumably to load and cache all the events) I've just noticed that on server 2008 R2 it seems instantaneous. Is my experience typical? Is there any setting I can tweak to make it fast on Windows 7 as well? Tim

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  • KVM-Guest does not boot: qemudParsePCIDeviceStrs

    - by markus
    I have a Server running Ubuntu 10.10 Server-Edition kvm, and libvirt (both ubuntu-native packages) HDD-Partitioning was done with LVM. Then I created some VMs with Virt-Manager and assigned LVM-Volumes to the VMs. Now the VMs do not boot. Virt-Manager shows a CPU-Usage of 100% for this Guest and the VNC-Connection states Booting from Hard Disk The VM-specific logfiles do not show any abnormality only syslog shows a warning warning : qemudParsePCIDeviceStrs:1422 : Unexpected exit status '1', qemu probably failed What can I do to find the error?

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  • MS Publisher 2003 - hangs when saving to desktop

    - by Chris
    We have a win 7 home prem pc, amd cpu, 8G ram, plenty of free disk space. Whenever user is working in publisher 20003, and tries to save a publisher 2003 document to the desktop, the save as dialog hangs and takes 2-3 minutes to display the desktop save location. I've tested excel 2003, it has no problems immediately displaying the desktop save as location and saving the file.

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  • 7-Zip compression on multi-core computers

    - by Peter Mortensen
    Does 7-Zip take advantage of multiprocessor or multi-core systems when compressing? For example, would there be a close to 16 times speed-up on a 16 core system assuming no disk or memory bottlenecks? Or is it is limited to 2 threads (2 times speed-up on systems with more than one CPU or core)?

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  • MongoDB and datasets that don't fit in RAM no matter how hard you shove

    - by sysadmin1138
    This is very system dependent, but chances are near certain we'll scale past some arbitrary cliff and get into Real Trouble. I'm curious what kind of rules-of-thumb exist for a good RAM to Disk-space ratio. We're planning our next round of systems, and need to make some choices regarding RAM, SSDs, and how much of each the new nodes will get. But now for some performance details! During normal workflow of a single project-run, MongoDB is hit with a very high percentage of writes (70-80%). Once the second stage of the processing pipeline hits, it's extremely high read as it needs to deduplicate records identified in the first half of processing. This is the workflow for which "keep your working set in RAM" is made for, and we're designing around that assumption. The entire dataset is continually hit with random queries from end-user derived sources; though the frequency is irregular, the size is usually pretty small (groups of 10 documents). Since this is user-facing, the replies need to be under the "bored-now" threshold of 3 seconds. This access pattern is much less likely to be in cache, so will be very likely to incur disk hits. A secondary processing workflow is high read of previous processing runs that may be days, weeks, or even months old, and is run infrequently but still needs to be zippy. Up to 100% of the documents in the previous processing run will be accessed. No amount of cache-warming can help with this, I suspect. Finished document sizes vary widely, but the median size is about 8K. The high-read portion of the normal project processing strongly suggests the use of Replicas to help distribute the Read traffic. I have read elsewhere that a 1:10 RAM-GB to HD-GB is a good rule-of-thumb for slow disks, As we are seriously considering using much faster SSDs, I'd like to know if there is a similar rule of thumb for fast disks. I know we're using Mongo in a way where cache-everything really isn't going to fly, which is why I'm looking at ways to engineer a system that can survive such usage. The entire dataset will likely be most of a TB within half a year and keep growing.

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  • I accidentally made my new hard drive (the non system drive) my primary partition

    - by qwerty2
    Hi all, When installing a new hard drive, I accidentally formatted it using 'Disk Management' and set it up as my primary active partition, even though it isn't the system drive. Then, when I restarted my machine, Windows wouldn't boot, citing a missing or corrupt SYSTEM folder. Can anyone help me re-enable the system hard drive as my primary active partition? Any help would be greatly appreciated.

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  • iotop for Linux kernel 2.6.18

    - by Lightsauce
    So it has to come to my attention that iotop isn't availalbe for 2.6.18 since it's less than 2.6.20 and requires Python 2.6+. I've done some research and came across this article: http://lserinol.blogspot.com/2009/09/io-usage-per-process-on-linux.html According to this, if these process have io stats in /proc/pid#/io (where pid# is the process #) it's doable regardless of the kernel version. So, in reality, I could upgrade Python to 2.6 and test out iotop. However, my flavor of Linux, CentOS release 5.5 (Final), only supports Python 2.4.3-44.el5 currently. If I were to do uninstall from yum, it doesn't look so pretty. It ends up wanting to uninstall 235 packages, most of which are very important! I read in one place, online (I forget the URL from yesterday), that you can install Python 2.6+ parallel to this one, and have the rpm install for iotop use that. Well, I didn't choose that route. I figured, what the heck, lets write iotop (not copying it, but reverse engineering it without actually looking at it's code/it in use) in bash. I thought it would just grab the /proc/pid#/io file and parse stats. So I wrote a script to grab the top 10 rchar, wchar, read_bytes, and write_bytes by collecting all these stats from all the /proc/pid#/io files, sorting them by each metric, then grabbing the top 10 highest values. The conclusion, the data seems completely useless. Does anybody know any resources for advanced Linux where I can figure out how to take these /proc/pid#/ directories and figure out what the heck they are doing with io on the disk? My main goal is to figure out what exactly is causing high load on my disk. I just know it's on the / partition (/dev/sda2 in this case), and I'm not really sure how to narrow it down without the help of iotop. If I run iostat to grab metrics for 1 minute, every second, the first result it gives me shows a high 'kB_read/s', so that makes me think, it's reading mostly. However, if I watch the update it gives me every second, it's actually just showing values for kB_wrtn/s. This makes me think the initial value iostat gives me is misleading.

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  • Minimize writes to SSD disks with Windows 7

    - by mfn
    Most people use their SSD as their primary system installation disk with Windows 7. W7 already has a lot of optimizations for SSDs, both in terms of performance and lifetime. Minimizing writes increases the lifetime of SSDs, so post each suggestion as an answer and let others vote on them.

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  • Installing Cygwin, what distro do I use?

    - by user2699451
    I have a fresh install of Windows and a Linux OS that I can't access, how do I fix this? I do not have the .iso/disk for Linux anymore. So I figured, I can install Cygwin and through that install Grub, but I am used to Linux Mint, which uses apt-get. I have used CentOS before which uses rpm, but how do I install and use packages in the Cygwin terminal, and is it possible to install Grub through Cygwin?

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  • Windows 7 reboot and freezing, possible power problems?

    - by mikelbring
    My Gateway LX Series desktop is about 6-8 months old. When I bought it, it had Windows Vista. I then put the RC version of Windows 7 on it. About 3 months after I bought it, it would randomly start to reboot, actually just shut off. I monitored the temperature levels and they seemed normal. So I installed a fresh Windows 7 Ultimate OEM 64bit. It actually got worse and would reboot more frequently. I then contacted Gateway and they said my machine was built for Windows Vista (made me chuckle), and told me to update my BIOS. So I did, and it was fixed for a good couple months. Recently, it started to do it again. Now I noticed early on it was doing it most often, if not every time when I was either watching a flash video or playing a flash game. So I decided to download the drivers again and I also downloaded my motherboard drivers. Seemed to be okay. A week later it started doing it again. And now it's doing it even more frequently. Sometimes I would turn it on, login into Windows and *BAM!* it would shut off. Now I am at the point where I can hardly get it to turn on. It would freeze at the point where it says "Starting Windows", with the Windows logo. Sometimes it would say "Checking disk for consistency" or whatever and freeze there (not shut off, just freeze). I even got the prompt to launch startup repair. But that also freezes when it says starting Windows. It does not really freeze, just never loads up. I am kind of lost as to what's going on. I have a few ideas but nothing I want to pursue (graphics card? hard drive?). Another thing I did try was to boot into a live disk of Ubuntu and try to launch every program I could and get on the internet but I never got it to reboot. So it sounds like to me it's a Windows thing, but I have no idea. I am just stuck and would like to see if any one has any ideas or could lead me in the right direction.

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