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• What is 'System Usage Specification' ?

  - by rohit k.

  My software is a video-audio converter and video cutter. I have used Qt(compiled from source) and ffmpeg (compiled from source). I have to prepare System Usage Specification outline and Specify Usage patterns of the system and indicate it using Run charts / Histograms. I am told to use Winrunner for this purpose. I don't know exactly what to do. Please help.

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• Proper pidfile usage

  - by Moev4

  I am unclear on the need and the usage of a pid-file and I wanted to know what is the correct usage of a pidfile and what are the best practices surrounding it.

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• ActiveMerchant Integration usage example?

  - by giorgian

  Where can I find a complete example of ActiveMerchant Integrations usage? I can see tons of examples of Gateways' usage, but couldn't see how an Integration should be used (e.g. what do you do in the return_url and cancel_return_url controller actions?)

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• How to treat CoreData entities with low memory usage

  - by Emmettoc

  Hello, I tried CoreData for iPhone app, but it's memory-hogging when entity instances are fetched. After they are released, memory usage doesn't decrease at all. Is there any way to treat them in a low memory usage. Thank you.

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• What does CPU Time consist of? [closed]

  - by Sid

  What does CPU time exactly consist of? For instance, is the time taken to access a page from the RAM (at which point, the CPU is most likely idling) part of the CPU time? I'm not talking about fetching the page from the disk here, just fetching it from the RAM. Thanks

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• Can I get memory usage of processes running on the monitored server by newrelic REST API

  - by youlin

  according to the newrelic faq https://docs.newrelic.com/docs/server/server-monitor-faq, The Server Monitoring agent can report Top 20 processes that are using significant memory or I/O and I can view the memory usage of the processes on the newrelic portal page. However, I do not find any clue about how to get this metrics by newrelic REST API (I can get the CPU usage of processes by REST API). Is it possible to do this?

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• Is there memory usage profiler available?

  - by prosseek

  For time profiler for XYZ, I can just run 'time XYZ', or if I have the source code in C/C++, I even can use gprof to get profiled results. Is there any similar tool for memory usage? Is there any tool I can use something like 'memory XYZ', to get info such as min/max/median memory usage? What tool do you use for memory profile with C++/Objective C/C#/Java?

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• DLL consumes 100 % CPU usage.

  - by Vikram

  A particular com dll which i created to do some operations, when loaded in memory it consumes 100% CPU usage. Because when i rename the dll or unload it CPU usage goes normal state. How to debug the issue?

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• Virtual Machine Manager 2012 is showing 0% CPU usage

  - by Mark Henderson

  When trying to do some science to answer this question, I took a Windows 7 guest on a Server 2008 R2 host being managed by SCVMM 2012 and ran Prime95 on it to just generate some CPU usage. Here's the Guest: The Hyper-V host shows 12%, which is 1/8 cores (which is what is allocated), so that's looking correct: But SCVMM is showing 0%: I have left the stress test running for a long time, thinking that maybe SCVMM averages out over a long time (I thought it was 9 minutes, but I've been known to be wrong; just don't tell my wife). Why is SCVMM showing 0% when everything else seems to disagree?

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• Why does mpstat show different values when I use the interval setting?

  - by Abe

  Here's the output I get when I run mpstat: $mpstat Linux 3.2.0-30-generic (my-laptop-C650) 09/17/2012 _x86_64_ (2 CPU) 05:32:01 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle 05:32:01 PM all 9.16 0.08 2.69 2.00 0.00 0.04 0.00 0.00 86.02 And here's what I get when I run it with a one-second interval: $mpstat 1 05:31:51 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle 05:31:52 PM all 1.52 0.00 1.01 0.00 0.00 0.00 0.00 0.00 97.47 05:31:53 PM all 2.04 0.00 1.02 0.00 0.00 0.00 0.00 0.00 96.94 05:31:54 PM all 1.50 0.00 1.50 0.00 0.00 0.00 0.00 0.00 97.00 Why does the first process show the processor as 86% idle, and the second show it as ~97% idle? I've tried this in a bunch of different configurations, and it's not a real difference in CPU usage -- unless mpstat itself is making the difference. Which number should I trust?

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• Very High Interrupt CPU usage in Win2k3 VM on vSphere

  - by Darragh

  Hi, I've been testing some software in a server virtual environment and I've noticed I get a huge amount of CPU usage on the Interrupts process. My question is, how does this relate to the virtual hardware platform as the rate is allot lower in a real system. Some how the hypervizor scheduler works hard to over come this problem but not as well as on real hardware does. Obvious things are high I/O and disk access but this application mostly just sits and works in memory allot. If anyone has experienced the same, please let me know. thanks in advance Screenshot: Process Explorer

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• php-cgi cpu usage is super high

  - by Ryan Thompson

  I am getting constantly high and wildly fluctuating CPU usage % for php-cgi commands as seen via "top" on my Centos server.. I have a server density account and it seems that this is a common trend: User - PID - CPU % - MEM % - VSZ - RSS - TT - Stat - Started - Time - Command 500 - 6389 - 22.4 - 3 - 271136 - 32380 - ? - S - 20:26 - 0:40 - /usr/bin/php-cgi Seems there are about 6 or so of those records in my processes list at any given check-in. Any ideas what's causing this? I have fast_cgi installed and the module is loading.. Not sure why it isn't handling this though. Any help would be greatly appreciated! Ryan

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• CentOS - massive usage on loopback interface

  - by Matthew Iselin

  Hi, I have a CentOS installation which is running fairly smoothly. Today I ran ifconfig mainly to see what sort of usage has been coming across the ethernet interface, and to also check my link speed. This is what I ended up seeing for the loopback device: lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:10301085132061223274 errors:0 dropped:0 overruns:0 frame:0 TX packets:13981054163812689233 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:11783901785008000095 (0.6 EiB) TX bytes:10333501021200548281 (0.9 EiB) This just feels completely wrong - almost an EiB of data? Any assistance in tracking down the source of these statistics would be greatly appreciated.

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• Disable usage of console-kit-daemon in Ubuntu

  - by Alex Marshall

  Hello, I administrate several Ubuntu 9.04 servers, and everytime I log in, I get the Landscape utility printout with server stats, etc. I really don't need this and it slows down my logins considerably. Can somebody please tell me how to disable message of the day as well as the landscape-sysin daemon ? I started tracking my logins using top, and when a user logs in, sshd shoots right up to 100% CPU usage, and I believe that landscape and the message of the day update daemon are the primary culprits. Does anybody else have any ideas as to what could be causing my horrible login times ?

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• High CPU usage when running a CentOS guest in VirtualBox

  - by sagi

  I am running CentOS 5.3 as a VirtualBox 3.0.0 guest running on Windows XP. The Windows host CPU usage is constantly at 50% although the CentOS guest is completely idle (i.e. 0.00 load average). I know this is a common problem related to the 1000Hz frequency that the CentOS kernel runs at, and previously a special kernel-vm packages were released to resolve the issue. However, these packages are out of date and the README says that they are not not necessary as of CentOS 5.3. I found out that there is supposedly a kernel parameter divider=10 that reduces the frequency to 100Hz with the standard kernel but it doesn't seem to have any effect when running inside VirtualBox. Is there any way to resolve the issue without resorting to a custom kernel?

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• Idle VMware Guests Resource Consumption

  - by Ravenor

  I want to setup a number of guests with multiple CPUs (4) and at least 4Gb ram running Ubuntu Linux. These machines will mostly be idle, but from time to time their workload will require all their resources, especially the CPU. The hosts are ESXi 5.x. The question is, am I right in thinking that the resource consumption of the machines when idle will be negligible? We know this true of disk and the CPU. The only concern left therefore is memory. Since ESX over-commits memory it makes sense that unused memory of any guest is paged out. If my thinking correct?

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• How to cope with runaway Flash plugin in Google Chrome browser?

  - by Norman Ramsey

  I'm using Google Chrome for Linux, version 5.0.307.11 (Official Build 39572) beta with the Linux Flash plugin version 10.0 r32. Quite often, the Flash plugin goes wild and pegs the CPU with about 95% usage. Laptop gets hot, battery drains. I can diagnose the problem with Chrome's little process monitor (shift-Esc), and I can even kill the plugin, but then when I actually want to use Flash on a page, I can't find a way to restart the plugin; I have to exit and restart Chrome, which with 30 tabs open is a huge hit. Does anyone know what causes this problem? Does anyone have a better workaround (or heaven forfend, a fix)? [I struct out both with search and with Google's help site for Chrome.]

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• Troubleshooting source of heavy resource-usage on a windows server 2008 running multiple sites

  - by batman_man

  Hi, I am running about 10 asp.net websites on a hosted virtual server. The server runs Server 2008 - each website is backed by its own database running on SQL server 2008 on the same box. Lately the box has seemed really slow. The only kind of discovery i could think of doing was looking in the task manager, where i can see w3wp and sqlserver.exe jumping to 40% cpu usage every 5-10 seconds. What are the steps i can take to determine which of my websites is taking these resources and or what database is getting hit the most? I have of course ssms installed on the machine as well. As you can tell, my sysadmin skills are very very limited - any help would be much appreciated.

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• 'inode table usage' spiking every morning at 8am

  - by Harry Wood

  I installed munin on my ubuntu server. It's showing my 'inode table usage' spiking every morning at 8am. It then rapidly curves down and settles over the course of several hours. What might cause this? I thought it might be something running in /etc/cron.daily but this was set to run at 6a.m. and I've changed it to 4am. The spike remains at 8am. I also enabled cron logging, but can't see anything getting launched at 8a.m. It's a virtual server hosted by memset. Could it be caused by something happening on the virtual host?

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• How to calculate power/energy taken by computer and screen

  - by r0ca

  I need to investigate how much power my linux machine uses per week. I can take a look at the PSU but I would like to know how to calculate the average use of power it takes. I also need to know how much power a CRT screen use per week. Do I need to check the PSU Watt unit and Screen Watt usage and just add both to have the results? P.S. My english is not good, sorry about that! P.P.S. My question is not related to: http://superuser.com/questions/9946/how-to-choose-a-ups-calculate-power-for-a-new-pc

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• Monitor HTTP usage on network from Linux free

  - by David

  I manage a small office network. I am looking to start monitoring/logging internet usage (website requests) for each user on a small network. All the windows clients are running through a switch to a BT router. I also have a linux (centos) machine which is connected as a client to the BT router as well. Is there any free software I can install on the linux box (or my own machine) to allow me to log and monitor websites requested by users kind of like browser history. Ideally, something that would collect each client's browser history in 1 place. Thanks

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• Memory cache Ubuntu 9.10 server x86 doesn't work as expected

  - by Matthijs

  We're using an Ubuntu 9.10 server to transfer Ghost-image files. We configured it only with Samba. And the DOS-clients connect to Samba. The latest updates are installed and so far the servers is running fine. When we image 10 pc's with the same image of 2 files of 2GB there's no disk activity. Everything is loaded in the RAM. There's 4GB in the server. But when we use 2 pc's with 2 different image files of 500 MB (8x) files then there's a lot of continuous disk activity. The speed is lower. So it seems that Ubuntu doesn't cache more then one big file. Are there settings to change this behaviour?

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• Audit Windows Server/Desktop Product Key usage

  - by neildeadman

  The company I work for has a fairly big domain of Windows Desktops and Servers. We also have standalone servers that are remote to our site but we have direct access to. We need to audit our license usage across all Windows machines (including some VMs). I have tried a few products downloaded, but the key returned is not the one used during installation. I have one product that gives the last 5 characters correctly but needs to be installed so its not really suitable. I also have tried some PowerShell scripts one of which is here Ideally I am looking for one that can be used over a network and if possible can audit Office keys too. I've just tried Jelly Bean and some other product key tools that all return BBBBB-BBBBB-BBBBB-BBBB-BBBBB as the product key.

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• ngen.exe is constantly using CPU

  - by teedyay

  I recently installed Windows 7. This was a clean install (i.e. not an upgrade from another version of Windows), but I did install a bunch of other programs. All mainstream applications - nothing wacky. Since then, my CPU usage has been constantly at around 50%. Task Manager shows me that ngen.exe is the culprit. It's not a long-running task: I can see that it gets a new PID at least once a second, so I guess something is constantly triggering it. It does it all the time, even when I have no applications running. Has anyone else seen this? How do I find out what's causing this?

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• Apache2 memory usage when uploading large files

  - by abhaga

  Hi, I am running apache2.2.12 along with PHP 5.2.10. PHP is configured to run as a separate process through fcgid. The problem is that when users upload a file, size of the apache process swells by almost the same amount. So if somebody tries to upload a 200 MB file, one of the child process swells to current size+200 MB. If 2 users simultaneously start uploading, my server crashes. Now it is the virtual memory size which is increasing but since I am on a OpenVZ based VPS, that is what counts. My questions are: Is it the normal Apache behavior or can I do something to fix this? If not, is there a more memory efficient way of handling big file uploads. Going by the current behavior, I will need 1 GB of free RAM for every apache child accepting a upload. Thanks! Abhaya -

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